SRAM Red AXS Disc Brake Caliper Piston Service Kit

You likely need a service if you notice inconsistent lever feel, sluggish piston retraction, or if the brakes feel 'sticky' even after a standard bleed. If you see fluid weeping around the caliper pistons or debris buildup that cleaning won't resolve, this kit is the correct next step.

No, this specific kit is engineered exclusively for SRAM Red AXS disc brake calipers. It is not compatible with Force, Rival, or older mechanical-hydraulic systems, as the piston dimensions and seal tolerances are specific to the Red AXS architecture.

This is an advanced maintenance task that requires specific tools, including a bleed kit and potentially a piston press. If you are comfortable performing hydraulic brake bleeds and have experience with caliper disassembly, you can do this at home; otherwise, we recommend having a professional mechanic handle it to ensure safety.

This kit is designed to service one caliper. If you are planning to refresh both your front and rear brakes, you will need to purchase two of these kits.

Not necessarily. A mushy lever is most often caused by air trapped in the hydraulic line, which requires a standard brake bleed. If you have already performed a proper bleed and the lever feel remains inconsistent or spongy, then internal seal degradation is the likely culprit, and this kit will help.