Modular 4-Piston Disc Brake Service Tool Kit (3D Printed)

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.