{"title":"Hope RX4 Brake Pads","description":"\u003cp\u003eChoose the RX4+ \/ original RX4-SH group for HBSP323 with a 37 mm reference width, or the original RX4-SR group for HBSP359 with a 31 mm reference width. These are different shapes with separate product listings. Hope E4 listings are in the E4 collection.\u003c\/p\u003e\u003cp\u003eChoose the relevant shape card to see its compatible pads. Original RX4-SR \/ HBSP359 is available in Semi-Metallic and Enduro Ceramic. The wider compound selection for RX4+ \/ RX4-SH does not establish RX4-SR compatibility.\u003c\/p\u003e\u003cp\u003eCompare the compound ratings and riding guidance for your chosen shape, then check rotor compatibility and pack contents on the product page.\u003c\/p\u003e","products":[{"product_id":"hope-rx4-disc-brake-pads-sram-version-30mm","title":"HOPE RX4-SR (SRAM) – Enduro Ceramic Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Enduro Ceramic brake pads for original Hope RX4-SR (SRAM) calipers using the HBSP359 pad shape.\u003c\/p\u003e\n\u003cp\u003eMatch your existing pad shape and exact caliper model before ordering. The performance information describes the Enduro Ceramic friction compound.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompound:\u003c\/strong\u003e Enduro Ceramic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking plate:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad shape:\u003c\/strong\u003e Hope RX4-SR (SRAM) — HBSP359\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRiding:\u003c\/strong\u003e Warmer, dry rides on conventional bicycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack contents:\u003c\/strong\u003e 2 brake pads and 1 pad spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e 1 compatible brake caliper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach pack contains one pair of pads (2 pads) and 1 spring for one compatible caliper. For front and rear replacement, check both calipers and order the appropriate pack for each.\u003c\/p\u003e\n\u003ch2\u003eEnduro Ceramic\u003c\/h2\u003e\n\u003cp\u003eA ceramic option for warmer, dry rides on conventional bicycles. Part of the Gorilla Brakes Performance range.\u003c\/p\u003e\n\u003cp\u003eActual braking performance and wear depend on your brake setup, rotor, bedding-in and riding conditions.\u003c\/p\u003e\n\u003ch2\u003eAluminium or steel backing plates?\u003c\/h2\u003e\n\u003cp\u003eThese pads use a steel backing plate. The compound guidance describes the Enduro Ceramic friction material.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/gorillabrakes.com\/pages\/gorilla-brakes-compound-comparison\"\u003eExplore the full compound comparison and testing\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThese pads fit original Hope RX4-SR (SRAM) calipers using the HBSP359 shape. They do not fit Hope E4, RX4+ or RX4-SH calipers that use HBSP323. Match the exact caliper version and your existing pad outline before ordering. Hope’s pad guide lists a reference width of 31 mm for HBSP359.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eBrake family\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCompatible calipers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHope RX4-SR (SRAM)\u003c\/th\u003e\n\u003ctd\u003eOriginal RX4-SR calipers — HBSP359 pad shape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eE-bike recommendation\u003c\/h3\u003e\n\u003cp\u003eGorilla Brakes positions Enduro Ceramic in its Performance range for conventional bicycles. For e-bike riding, Gorilla Brakes recommends the Enduro Pro and Factory Racing brake pad ranges. Match the pad shape and complete brake setup to your bike and its total load.\u003c\/p\u003e\n\u003ch3\u003eRotor compatibility\u003c\/h3\u003e\n\u003cp\u003eThis compound is suitable for all bicycle disc brake rotor types, including rotors marked “resin pads only”.\u003c\/p\u003e\n\u003cp\u003eRotor diameter and thickness must meet your brake manufacturer’s specifications. Check rotor condition and minimum permitted thickness before fitting new pads.\u003c\/p\u003e\n\u003ch2\u003eFitting and bedding in\u003c\/h2\u003e\n\u003cp\u003eFollow the installation guide for your braking system, then complete the recommended bedding-in procedure before normal riding.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/how-to-install-gorilla-brakes-disc-brake-pads\"\u003eFitting and bedding in\u003c\/a\u003e · \u003ca href=\"\/pages\/bedding-in-new-brake-pads-guide\"\u003eBedding-in guide\u003c\/a\u003e\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":45131704009023,"sku":"N114-HOPE-RX4","price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/HOPE-rx4-30mm-sram-version-enduro-ceramic.jpg?v=1760978008"},{"product_id":"factory-racing-hope-rx4-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Factory Racing Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Factory Racing replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\n\u003cp\u003eMatch your existing pad shape and exact caliper model before ordering. The shared ratings describe the Factory Racing Hard friction compound.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompound:\u003c\/strong\u003e Factory Racing Hard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking plate:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad shape:\u003c\/strong\u003e Hope RX4+ \/ original RX4-SH — HBSP323 (37 mm reference width)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRiding:\u003c\/strong\u003e Dry and wet riding; compatible e-bike use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack contents:\u003c\/strong\u003e 2 brake pads and 1 pad spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e 1 compatible brake caliper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach pack contains one pair of brake pads (2 pads) and 1 pad spring for one compatible caliper. Order two packs for both brakes only after checking that both calipers use this pad shape.\u003c\/p\u003e\n\u003ch2\u003eFactory Racing Hard\u003c\/h2\u003e\n\u003cp\u003eStrong dry and wet braking, with a performance profile that also highlights lifespan, quietness and heat dissipation.\u003c\/p\u003e\n\u003cp\u003eFactory Racing Hard is shown as Factory Racing Green in the comparison data. Scores are approximate readings from the supplied chart; actual braking and wear depend on your brake setup and riding conditions.\u003c\/p\u003e\n\u003ch3\u003eCompound ratings out of 10\u003c\/h3\u003e\n\u003cp\u003eThese scores describe the friction compound.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDry braking: ≈9.5 out of 10\u003c\/li\u003e\n\u003cli\u003eWet braking: ≈7.5 out of 10\u003c\/li\u003e\n\u003cli\u003eLifespan: ≈9 out of 10\u003c\/li\u003e\n\u003cli\u003eQuietness: ≈8 out of 10\u003c\/li\u003e\n\u003cli\u003eHeat dissipation: ≈8 out of 10\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eApproximate ratings out of 10 from the supplied Factory Racing compound chart. Higher ratings indicate stronger performance in that category; a higher quietness rating means quieter braking.\u003c\/p\u003e\n\u003ch2\u003eFactory Racing Hard: braking power\u003c\/h2\u003e\n\u003cp\u003eThese pads use a steel backing plate. The ratings shown on this page describe the Factory Racing Hard friction compound.\u003c\/p\u003e\n\u003cp\u003eBraking power versus rotor temperature in the published comparison. The graph includes several pad, rotor and backing plate configurations; it does not measure backing plate cooling time.\u003c\/p\u003e\n\u003cp\u003eFollow the Factory Racing Green curve for the Hard compound. In the Shimano XT RT86 rotor comparison, its highest plotted output was approximately 1,010 W. Values are approximate reconstructions from the supplied graph. This result describes the tested pad and rotor setup, not a maximum power rating or a fitment test.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/gorillabrakes.com\/pages\/gorilla-brakes-compound-comparison\"\u003eExplore the full compound comparison and testing\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccaption\u003eCompatible brake calipers\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eBrake family\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCompatible calipers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHope RX4+\u003c\/th\u003e\n\u003ctd\u003eRX4+ mineral-oil and DOT versions using HBSP323\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOriginal Hope RX4-SH\u003c\/th\u003e\n\u003ctd\u003eOriginal RX4-SH (Shimano) using HBSP323\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eE-bike use\u003c\/h3\u003e\n\u003cp\u003eFactory Racing Hard is an e-bike-rated compound. Use this pad shape only with the compatible calipers listed here, and match the complete brake setup to your bike and total load.\u003c\/p\u003e\n\u003ch3\u003eRotor compatibility\u003c\/h3\u003e\n\u003cp\u003eThis compound is suitable for all bicycle disc brake rotor types, including rotors marked “resin pads only”.\u003c\/p\u003e\n\u003cp\u003eRotor diameter and thickness must meet your brake manufacturer’s specifications. Check rotor condition and minimum permitted thickness before fitting new pads.\u003c\/p\u003e\n\u003ch2\u003eFitting and bedding in\u003c\/h2\u003e\n\u003cp\u003eFollow the installation guide for your braking system, then complete the recommended bedding-in procedure before normal riding.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/how-to-install-gorilla-brakes-disc-brake-pads\"\u003eFitting and bedding in\u003c\/a\u003e · \u003ca href=\"\/pages\/bedding-in-new-brake-pads-guide\"\u003eBedding-in guide\u003c\/a\u003e\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":51630216315263,"sku":"BP-59E-SP-59-RX4","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-factory-racing-hope-rx4-plus-disc-brake-pads.jpg?v=1757519405"},{"product_id":"nrs-hope-rx4-brake-pads","title":"HOPE RX4+ \/ RX4-SH – NRS Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes NRS replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\n\u003cp\u003eMatch your existing pad shape and exact caliper model before ordering. The performance information describes the NRS ONE friction compound.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompound:\u003c\/strong\u003e NRS ONE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking plate:\u003c\/strong\u003e Stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad shape:\u003c\/strong\u003e Hope RX4+ \/ original RX4-SH — HBSP323 (37 mm reference width)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRiding:\u003c\/strong\u003e XC, light trail and everyday riding for lighter riders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack contents:\u003c\/strong\u003e 2 friction pads with an integrated spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e 1 compatible brake caliper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe two friction pads and spring form one NRS ONE assembly for one compatible caliper. The spring is integrated, not a separate loose component.\u003c\/p\u003e\n\u003ch2\u003eNRS ONE\u003c\/h2\u003e\n\u003cp\u003eA soft organic compound for lighter riders, XC, light trail and everyday riding, with smooth, predictable braking control.\u003c\/p\u003e\n\u003cp\u003eBraking feel, noise and wear depend on your brake setup, rotor, installation and riding conditions. Follow the brake manufacturer’s fitting and bedding-in instructions.\u003c\/p\u003e\n\u003ch2\u003eAluminium or steel backing plates?\u003c\/h2\u003e\n\u003cp\u003eNRS ONE combines stainless-steel backing with an integrated spring in a one-piece assembly. The compound guidance describes the soft organic friction material.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/gorillabrakes.com\/pages\/gorilla-brakes-compound-comparison\"\u003eExplore the full compound comparison and testing\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccaption\u003eCompatible brake calipers\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eBrake family\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCompatible calipers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHope RX4+\u003c\/th\u003e\n\u003ctd\u003eRX4+ mineral-oil and DOT versions using HBSP323\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOriginal Hope RX4-SH\u003c\/th\u003e\n\u003ctd\u003eOriginal RX4-SH (Shimano) using HBSP323\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRiding recommendation\u003c\/h3\u003e\n\u003cp\u003eGorilla Brakes recommends NRS ONE for lighter riders and light use. It does not recommend this soft organic compound for e-bikes, enduro, downhill or heavier riders. For e-bike riding, Gorilla Brakes recommends the Enduro Pro and Factory Racing brake pad ranges. Match the pad shape and complete brake setup to your bike and its total load.\u003c\/p\u003e\n\u003ch3\u003eRotor compatibility\u003c\/h3\u003e\n\u003cp\u003eThis compound is suitable for all bicycle disc brake rotor types, including rotors marked “resin pads only”.\u003c\/p\u003e\n\u003cp\u003eRotor diameter and thickness must meet your brake manufacturer’s specifications. Check rotor condition and minimum permitted thickness before fitting new pads.\u003c\/p\u003e\n\u003ch2\u003eFitting and bedding in\u003c\/h2\u003e\n\u003cp\u003eFollow the installation guide for your braking system, then complete the recommended bedding-in procedure before normal riding.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/how-to-install-gorilla-brakes-disc-brake-pads\"\u003eFitting and bedding in\u003c\/a\u003e · \u003ca href=\"\/pages\/bedding-in-new-brake-pads-guide\"\u003eBedding-in guide\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCan I return used NRS ONE backplates for recycling?\u003c\/h2\u003e\n\u003cp\u003eYes. Gorilla Brakes offers £10 credit on your next order when used NRS backplates are returned through its recycling programme. A free return label is available on request. Credit is processed after the return is received; the programme’s conditions apply.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/gorillabrakes.com\/pages\/gorilla-brakes-brake-pad-recycling-program\"\u003eNRS ONE recycling programme and return-label details\u003c\/a\u003e\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":54846902305151,"sku":"R-11 Hope RX4 NRS brake pads","price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/NRS-Hope-E4-brake-pads.jpg?v=1757454547"},{"product_id":"sintered-brake-pads-hope-rx4","title":"HOPE RX4+ \/ RX4-SH – Sintered Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Sintered replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\n\u003cp\u003eMatch your existing pad shape and exact caliper model before ordering. The performance information describes the Sintered friction compound.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompound:\u003c\/strong\u003e Sintered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking plate:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad shape:\u003c\/strong\u003e Hope RX4+ \/ original RX4-SH — HBSP323 (37 mm reference width)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRiding:\u003c\/strong\u003e Cold, wet and muddy conditions; winter commuting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack contents:\u003c\/strong\u003e 2 brake pads and 1 pad spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e 1 compatible brake caliper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach pack contains one pair of pads (2 pads) and 1 spring for one compatible caliper. For front and rear replacement, check both calipers and order the appropriate pack for each.\u003c\/p\u003e\n\u003ch2\u003eSintered\u003c\/h2\u003e\n\u003cp\u003eStrong wet-weather braking and durable performance for cold, wet and muddy rides. A good choice for winter commuting and everyday riding in poor weather.\u003c\/p\u003e\n\u003cp\u003ePublished results describe the tested pad, rotor and brake setup. Graph values are approximate; actual braking and wear depend on your setup and riding conditions.\u003c\/p\u003e\n\u003ch2\u003eSintered: braking power\u003c\/h2\u003e\n\u003cp\u003eThese pads use a steel backing plate.\u003c\/p\u003e\n\u003cp\u003eBraking power versus rotor temperature in the published comparison. The graph includes several pad, rotor and backing plate configurations; it does not measure caliper temperature or backing plate cooling time.\u003c\/p\u003e\n\u003cp\u003eFollow the Gorilla Sintered curve. Its highest plotted output in the Shimano XT RT86 rotor comparison was approximately 1,020 W. Values are approximate reconstructions from the supplied graph. This result describes the tested pad and rotor setup, not a maximum power rating or a fitment test.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/gorillabrakes.com\/pages\/gorilla-brakes-compound-comparison\"\u003eExplore the full compound comparison and testing\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccaption\u003eCompatible brake calipers\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eBrake family\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCompatible calipers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHope RX4+\u003c\/th\u003e\n\u003ctd\u003eRX4+ mineral-oil and DOT versions using HBSP323\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOriginal Hope RX4-SH\u003c\/th\u003e\n\u003ctd\u003eOriginal RX4-SH (Shimano) using HBSP323\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eE-bike recommendation\u003c\/h3\u003e\n\u003cp\u003eSintered pads can be used on compatible e-bikes when permitted by the brake and rotor manufacturers. Sintered pads generate a lot of heat, which can transfer to the caliper faster than with other compounds in our range. For high-heat applications, Gorilla Brakes recommends the Enduro Pro and Factory Racing compounds.\u003c\/p\u003e\n\u003ch3\u003eRotor compatibility\u003c\/h3\u003e\n\u003cp\u003eUse Sintered pads only with rotors approved for metallic or sintered pads. Do not use them with rotors marked “resin pads only”.\u003c\/p\u003e\n\u003cp\u003eRotor diameter and thickness must meet your brake manufacturer’s specifications. Check rotor condition and minimum permitted thickness before fitting new pads.\u003c\/p\u003e\n\u003ch2\u003eFitting and bedding in\u003c\/h2\u003e\n\u003cp\u003eFollow the installation guide for your braking system, then complete the recommended bedding-in procedure before normal riding.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/how-to-install-gorilla-brakes-disc-brake-pads\"\u003eFitting and bedding in\u003c\/a\u003e · \u003ca href=\"\/pages\/bedding-in-new-brake-pads-guide\"\u003eBedding-in guide\u003c\/a\u003e\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":55609469337983,"sku":"N96-HOPE-RX4-SIN","price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-sintered-brake-pads-hope-rx4-37mm.jpg?v=1750451546"},{"product_id":"hope-rx4-sram-30-mm-semi-metallic-disc-brake-pads-gorilla-brakes","title":"HOPE RX4-SR (SRAM) – Semi-Metallic Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Semi-Metallic brake pads for original Hope RX4-SR (SRAM) calipers using the HBSP359 pad shape.\u003c\/p\u003e\n\u003cp\u003eMatch your existing pad shape and exact caliper model before ordering. The performance information describes the Semi-Metallic friction compound.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompound:\u003c\/strong\u003e Semi-Metallic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking plate:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePad shape:\u003c\/strong\u003e Hope RX4-SR (SRAM) — HBSP359\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRiding:\u003c\/strong\u003e Commuting, road, gravel and lighter trails\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack contents:\u003c\/strong\u003e 2 brake pads and 1 pad spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e 1 compatible brake caliper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach pack contains one pair of pads (2 pads) and 1 spring for one compatible caliper. For front and rear replacement, check both calipers and order the appropriate pack for each.\u003c\/p\u003e\n\u003ch2\u003eSemi-Metallic\u003c\/h2\u003e\n\u003cp\u003eA versatile everyday compound for commuting, road, gravel and lighter trails. Part of the Gorilla Brakes Performance range for conventional bicycles.\u003c\/p\u003e\n\u003cp\u003eActual braking performance and wear depend on your brake setup, rotor, bedding-in and riding conditions.\u003c\/p\u003e\n\u003ch2\u003eAluminium or steel backing plates?\u003c\/h2\u003e\n\u003cp\u003eThese pads use a steel backing plate. The compound guidance describes the standard Semi-Metallic friction material.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/gorillabrakes.com\/pages\/gorilla-brakes-compound-comparison\"\u003eExplore the full compound comparison and testing\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThese pads fit original Hope RX4-SR (SRAM) calipers using the HBSP359 shape. They do not fit Hope E4, RX4+ or RX4-SH calipers that use HBSP323. Match the exact caliper version and your existing pad outline before ordering. Hope’s pad guide lists a reference width of 31 mm for HBSP359.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eBrake family\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCompatible calipers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHope RX4-SR (SRAM)\u003c\/th\u003e\n\u003ctd\u003eOriginal RX4-SR calipers — HBSP359 pad shape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eE-bike recommendation\u003c\/h3\u003e\n\u003cp\u003eGorilla Brakes positions standard Semi-Metallic in its Performance range for conventional bicycles. For e-bike riding, Gorilla Brakes recommends the Enduro Pro and Factory Racing brake pad ranges. Match the pad shape and complete brake setup to your bike and its total load.\u003c\/p\u003e\n\u003ch3\u003eRotor compatibility\u003c\/h3\u003e\n\u003cp\u003eThis compound is suitable for all bicycle disc brake rotor types, including rotors marked “resin pads only”.\u003c\/p\u003e\n\u003cp\u003eRotor diameter and thickness must meet your brake manufacturer’s specifications. Check rotor condition and minimum permitted thickness before fitting new pads.\u003c\/p\u003e\n\u003ch2\u003eFitting and bedding in\u003c\/h2\u003e\n\u003cp\u003eFollow the installation guide for your braking system, then complete the recommended bedding-in procedure before normal riding.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/how-to-install-gorilla-brakes-disc-brake-pads\"\u003eFitting and bedding in\u003c\/a\u003e · \u003ca href=\"\/pages\/bedding-in-new-brake-pads-guide\"\u003eBedding-in guide\u003c\/a\u003e\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":56253234938239,"sku":"N115-HOPE-RX4","price":10.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/HOPE-RX4-SRAM-30-mm_Semi-Metallic-Disc-Brake-Pads.jpg?v=1760978558"},{"product_id":"hope-rx4-plus-rx4-sh-enduro-ceramic-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Enduro Ceramic Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Enduro Ceramic replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994122097023,"sku":"N99-HOPE-RX4PLUS-SH-ENDURO-CERAMIC","price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-enduro-ceramic-hope-e4-rx4-brake-pads_e2abcce5-2d6b-4bc6-81fc-b48913554375.jpg?v=1793188922"},{"product_id":"hope-rx4-plus-rx4-sh-enduro-pro-ultimate-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Enduro Pro Ultimate Disc Brake Pads | Gorilla Brakes UK","description":"\u003cp\u003eGorilla Brakes Enduro Pro Ultimate replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994125308287,"sku":"N105-HOPE-RX4PLUS-SH-ENDUROULT","price":23.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-enduro-pro-ultimate-hope-e4-rx4_f29f16af-8c7b-4a49-adf4-bf3312f2ae53.jpg?v=1793188935"},{"product_id":"hope-rx4-plus-rx4-sh-factory-racing-stealth-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Factory Racing Stealth Disc Brake Pads | Gorilla Brakes UK","description":"\u003cp\u003eGorilla Brakes Factory Racing Stealth replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994125439359,"sku":"BP-59T-SP-59-RX4PLUS-SH","price":15.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-factory-racing-stealth-hope-e4-rx4_67ab24c7-fc01-400c-803b-92497e1a6ddd.jpg?v=1793188937"},{"product_id":"hope-rx4-plus-rx4-sh-semi-metallic-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Semi-Metallic Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Semi-Metallic replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994125635967,"sku":"N97-SM-HOPE-RX4PLUS-SH","price":10.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-hope-e4-semi-metallic_ec0bbe35-8887-4f27-ae2c-3d48279f40cc.jpg?v=1793188939"},{"product_id":"hope-rx4-plus-rx4-sh-enduro-pro-resin-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Enduro Pro Resin Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Enduro Pro Resin replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994125799807,"sku":"N103-GB-EPR-HOPE-RX4PLUS-SH","price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-enduro-pro-resin-hope-e4-rx4_7331d132-5ee7-48c6-8cc4-08bf747acd16.jpg?v=1793188942"},{"product_id":"hope-rx4-plus-rx4-sh-factory-racing-organic-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Factory Racing Organic Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Factory Racing Organic replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994126094719,"sku":"BP-59Q-SP-59-RX4PLUS-SH-Org","price":11.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-hope-e4-rx4-organic-disc-brake-pads_ccafa429-ab06-4675-8b94-09c0ce160ea7.jpg?v=1793188944"},{"product_id":"hope-rx4-plus-rx4-sh-enduro-pro-semi-metallic-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Enduro Pro Semi-Metallic Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Enduro Pro Semi-Metallic replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994126619007,"sku":"N104-HOPE-RX4PLUS-SH-END-PRO-SM","price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/gorilla-brakes-enduro-pro-semi-metallic-hope-e4-rx4_c5638b2f-b3f5-446d-bf81-bc18666c4697.jpg?v=1793188946"},{"product_id":"hope-rx4-plus-rx4-sh-ceramic-brake-pads","title":"HOPE RX4+ \/ RX4-SH – Ceramic Disc Brake Pads | Gorilla Brakes","description":"\u003cp\u003eGorilla Brakes Ceramic replacement disc brake pads for road and gravel bikes with Hope RX4+ or original RX4-SH (Shimano) calipers. These use the HBSP323 shape with a 37 mm reference width.\u003c\/p\u003e\u003cp\u003eFor Hope RX4+ and original RX4-SH (Shimano) calipers using HBSP323 with a 37 mm reference width. Check the exact caliper version and complete pad outline. Not for original RX4-SR (SRAM), which uses the smaller HBSP359 shape with a 31 mm reference width. The two shapes are not interchangeable.\u003c\/p\u003e","brand":"Gorilla Brakes","offers":[{"title":"Default Title","offer_id":58994126848383,"sku":"N98-HOPE-RX4PLUS-SH-CER","price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9831\/3279\/files\/Ceramic-disc-brake-pads-for-hop-e4-rx4_f3900470-bf3a-4f0c-b748-309985f265bc.jpg?v=1793188948"}],"url":"https:\/\/gorillabrakes.com\/collections\/hope-rx4-brake-pads.oembed?page=2","provider":"Gorilla Brakes","version":"1.0","type":"link"}