4X 22mm Brake Piston Replacement Kit For Mountain Bikes With Sealing Rings Built Tough With High Temp Aluminum Alloy To Stop Side Leakage Fits M675 M785 M8100 M9020 M9100 Calipers R7070 R8070 R9170 RS785 RS805

Brake Piston Kit for Mountain Bike Calipers - 2 Pistons ✔️ Aluminum alloy, high-temp seal, 2 pistons, 21.9×9 mm / 0.86×0.35 in

This brake piston replacement kit is designed for hydraulic disc brake calipers used on mountain bikes. It fits multiple caliper models, and includes pistons, seals, and rings to rebuild the hydraulic area and stop side leakage. Built from aluminum alloy with high temperature resistance, it’s made to endure braking heat and maintain consistent stopping power.

✅ Pistons: 2 pieces
✅ Piston sealing rings: 2 pieces
✅ Disc brake sealing rings: 2 pieces
✅ Small sealing rings: 4 pieces (4 pack)
✅ Size: 21.9 mm × 9 mm (0.86 in × 0.35 in)
✅ Material: Aluminum alloy, high temperature resistant
✅ Color options: Black, Red, Blue
✅ Caliper compatibility: M675, M785, M8100, M9020, M9100, R7070, R8070, R9170, RS785, RS805

💡 What is a brake piston replacement kit used for in mountain bike hydraulic brakes?

- It helps seal the piston to prevent side leakage and restore braking power. - It is designed to fit a range of calipers such as M675, M785, M9100, M9020, R7070, RS785, RS805. - It includes pistons, piston sealing rings, disc brake sealing rings, and small seals for a full rebuild. - It uses aluminum alloy with high-temperature resistance for durability. ✝️