Service 4-piston hydraulic disc brakes properly with a compact, slot-together workshop tool system designed for modern MTB and e-MTB calipers. The Gorilla Brakes Modular Disc Brake Service Tool Kit combines piston retraction, piston cleaning support, and caliper alignment into one tidy modular unit—built for controlled workshop use, not brute-force prying.
Service 4-piston hydraulic disc brakes properly with a compact, slot-together workshop tool system designed for modern MTB and e-MTB calipers.
Built by riders who work on brakes. If you swap pads often, fight piston imbalance, or chase rotor rub after refitting a wheel, this kit is designed to make those jobs faster, cleaner, and more consistent—without overcomplicating your toolbox.
What’s Included (3 Tools, 1 Modular System)
1) Dual Piston Retraction Levers
Designed to reset opposing pistons evenly on 4-piston calipers. Helps reduce the common issue of one piston moving more than the other during pad changes.
Benefit: more controlled piston reset and smoother pad installation
Use case: pad swaps, wheel changes, post-bleed piston reset
2) 4-Piston Cleaning Support Tool
Holds pistons at a consistent, correct extension for cleaning and inspection. Ideal for routine maintenance on high-mileage bikes and full-power e-MTBs.
Benefit: cleaner pistons = better return and reduced sticking
Use case: piston wipe-down, seal area cleaning (with appropriate cleaner)
3) Caliper Alignment Tool
Helps centre the caliper over the rotor to reduce rub after installing pads or refitting a wheel.
Benefit: quicker rub-free alignment and quieter braking
Use case: post-pad change alignment, rotor/caliper rub troubleshooting
Compatibility
Designed around most modern MTB and e-MTB 4-piston hydraulic disc brake calipers, including:
Shimano 4-piston: Deore, SLX, XT, XTR, Saint, Zee
SRAM: Code, Guide RE, Motive
Hope: 4-piston systems
And most modern 4-piston calipers with similar piston layouts
Note: This kit is designed for 4-piston calipers. If you’re unsure about fitment, match your caliper type and piston count before ordering.
Materials & Construction
This kit is FDM (Fused Deposition Modelling) 3D printed using PLA (Polylactic Acid), a plant-based bioplastic (corn/sugarcane derived). PLA is lightweight and rigid, making it ideal for controlled workshop tooling.
Lightweight but rigid for consistent handling
3D printed for precision geometry and modular design
Workshop-grade use—not intended as a heavy-duty pry bar
Modular Slot-Together Design
Each piece slots together into one compact unit for storage and transport. No loose tools in your toolbox—everything stays together between services.
Storage Guidance
PLA performs reliably in normal workshop environments, but like any polymer it should be treated with care:
Store away from high heat (do not leave in hot cars or near heaters)
Avoid high humidity for long-term storage
Keep clean and dry between uses
Simple Workshop Guarantee
If there’s a manufacturing defect or a problem under normal controlled workshop use, we’ll put it right.
Pro Workshop Tip
For best results, clean pistons regularly and retract evenly. Consistent piston movement improves lever feel, reduces rub, and helps pads bed in properly—especially on powerful 4-piston MTB and e-MTB brakes.
Yes. The tool is designed to work with Shimano 4-piston hydraulic calipers including Deore, SLX, XT, XTR, Saint and Zee models. It supports even piston retraction, piston cleaning and caliper alignment on standard Shimano 4-piston MTB and e-MTB brake systems.
Yes. It is compatible with SRAM 4-piston calipers including Motive, Code, Guide RE and Maven. The dual piston reset design allows balanced pressure across opposing pistons, which is particularly useful when servicing high-power SRAM trail and gravity brakes.
Yes. The tool is suitable for Hope 4-piston hydraulic calipers commonly used on MTB and enduro bikes. It assists with controlled piston reset, cleaning access and accurate caliper centring over the rotor.
The tool is specifically designed for 4-piston calipers. It is not intended for 2-piston road or gravel calipers. Always confirm your brake uses a 4-piston opposing layout before purchase.
4-piston calipers require balanced and even retraction to prevent uneven pad wear and inconsistent lever feel. A tool designed specifically for Shimano, SRAM and Hope 4-piston systems helps ensure proper piston reset and accurate caliper alignment during servicing.
Racing stealth pads once bedded in they made a massive improvement over the standard pads very pleased highly recommend
Hi there! Thanks for leaving us a review. We're so glad to hear that our Shimano MT Series (B-Type) - Factory Racing Stealth Disc Brake Pads have made a massive improvement for you. We pride ourselves on providing high-quality products, so we're happy to know we've met your expectations. Thanks for recommending us! Happy riding!
Hi I received this product very quick and my boy said he's well happy with brakes. Thank-you gorilla
Hi there! Thanks for leaving us a review. We're glad to hear that your boy is happy with the brakes. It's always our goal to provide quick and efficient service. Thank you for choosing Gorilla Brakes!
