Take a closer look at Gorilla Brakes Factory Racing Stealth pads — designed for quiet braking, smooth modulation and dependable braking performance.
Compatible with selected Tektro heavy-duty 2-piston e-bike, cargo-bike, touring and commuter brake calipers requiring the extra-thick 5mm E11.11 or P21.11 pad format.
Gorilla Brakes Factory Racing Stealth 5mm Pads combine our high-performance Factory Racing friction compound with an acoustic damping layer designed to reduce vibration and unwanted braking noise. Developed for the increased weight and braking demands of e-bikes, cargo bikes and utility cycles, they deliver powerful braking, progressive control and consistent performance under load.
These pads use the 5mm E11.11/P21.11-compatible pad profile. They are thicker than standard Tektro 2-piston pads, so the exact brake model and caliper position must be checked before ordering.
✅ Compatibility Chart
Brake System
Compatible Model
Important Information
Auriga
HD-E540, HD-T540
2-piston cargo and e-bike system
Auriga
HD-E541
Parking-lock e-bike variant
Auriga
HD-E546, HD-E547
Heavy-duty e-bike variants
Auriga Twin
HD-E545, HD-T545
Twin-caliper trike and cargo system
Auriga SUB / E-Comp
HD-T390, HD-M390, HD-E395
Compatible 5mm 2-piston systems
Gemini
HD-M3520, HD-T3520
2-piston e-bike systems
Gemini
HD-M530
Rear caliper only
Tektro Orion / HD Series
HD-M6020, HD-T6020
2-piston 5mm pad system
Tektro HD Series
HD-M5120
2-piston 5mm pad system
⚠️ Please note: On a Tektro HD-M530 brake system, these 5mm 2-piston pads fit the rear caliper only. The HD-M530 front caliper is a 4-piston design that requires the separate 5mm Q13RS-format brake pad.
Auriga Twin owners: This product contains enough pads for one caliper. A twin-caliper system normally requires two pairs for a complete pad replacement.
🔥 Compound Type: Factory Racing Stealth
The Factory Racing Stealth Compound is designed to provide strong, predictable braking while minimising noise and vibration. Its multi-layer construction combines a high-performance friction material with acoustic damping, making it particularly well suited to heavier e-bikes, cargo bikes, trikes and frequently used utility cycles.
Feature
Performance Benefit
Stealth acoustic damping layer
Helps reduce braking noise and vibration
Factory Racing friction compound
Powerful braking with progressive modulation
Heat-resistant construction
Consistent performance during repeated braking
5mm heavy-duty pad format
Designed for compatible cargo and e-bike calipers
Precision fit
Compatible with the listed E11.11 and P21.11 applications
📏 Pad Specification
Pad format
E11.11/P21.11-compatible
Overall thickness
5mm
Caliper type
Compatible Tektro 2-piston calipers
Compound
Factory Racing Stealth
Application
E-bike, cargo bike, trike, touring and utility use
📦 What’s Included
1 × Pair of 5mm brake pads
1 × Spring clip
Enough pads for one 2-piston caliper
Eco-friendly recyclable packaging
🌍 Ideal For
Electric commuter and touring bikes
Cargo bikes carrying additional weight
Electric trikes using Tektro Auriga Twin brakes
Utility and delivery bikes exposed to frequent braking
Riders seeking powerful braking with reduced noise and vibration
🔍 Check Before Ordering
Confirm that your brake model appears in the compatibility chart above
Check that your original pads use the 5mm E11.11 or P21.11 profile
For the HD-M530, order these pads for the rear caliper only
Do not use these pads in standard-thickness Tektro or TRP 2-piston calipers
Gorilla Brakes is trusted by riders worldwide, with over 13,000 verified positive feedback ratings.
We also work closely with race teams and sponsored riders to validate performance in real-world conditions.
Great brake pads. They wear quite fast but the braking power is excellent - that’s the trade off I guess.
Thanks for the feedback. SRAM Maven brakes do tend to wear through brake pads much faster than many other braking systems.
A full sintered compound can last longer, but Maven brakes can be very sensitive to harder metallic pads and may produce significant vibration resonance and that familiar loud squeal. As you said, our Factory Racing compound is a great compromise, offering excellent braking power, good modulation and much better noise control, although the trade-off is slightly faster wear.
Awesome stopping power, a noticeable improvement over standard.
Hi Mark, we're thrilled to hear you're enjoying the improved stopping power! Thanks for sharing your experience with the Shimano MT Series pads. Ride safe!
