🚲 Don't Let Leaks Slow You Down!
This Bicycle Hydraulic Brake Caliper Piston Oil Leakage Repair Parts Maintenance Upgrade Kit is designed for Shimano SLX, XT, and XTR models. It features high-temperature resistance, precision machining, and includes all necessary seals and o-rings for a complete repair. Weighing only 0.15 oz, this lightweight kit is essential for maintaining peak brake performance.
| Color | Black |
| Size | Universal |
| Length | 8.8 millimeters |
| Material Type | polyester |
| Brand | EXNAVI |
| Manufacturer | EXNAVI |
| Manufacturer reference | EX21988 |
| Package Dimensions | 10.16 x 7.62 x 1.27 cm; 9 g |
| ASIN | B08HD94YKC |
O**R
Worked Perfectly for GRX 810 (BR-RX810) Disc Calipers
I needed to replace the pistons in my GRX disc caliper as one cracked after pushing my brakes past their limit on a very tough (read dumb) ride. The caliper disassembly and rebuild was straightforward with the pistons and piston seals. I did not use the kit’s smaller o-rings. After a couple of fluid bleeds, the brakes pumped up nicely and my original lever feel has been restored. I do not see any leaks or reason to believe they will start leaking.Although my measurements show the EXNAVI pistons as 0.01mm larger than the OEM version, be mindful that 0.01 is within the error of this type of measurement tool and technique. I run a machine shop and have done a ton of mechanical repairs in all sorts of machines over the years and had no qualms about dropping these replacement pistons in. Although I can’t specifically pinpoint the exact material these are made of, it does appear to be a ceramic. I would even say that the surface finish appears to be smoother than the OEM pistons - perhaps that’s a good thing?Overall, If I ever need to repair another caliper, I would have no hesitation to buy this kit again.
A**Y
Works great on R9170 calipers!
The pistons fit perfectly inside the R9170 existing seals. I did not try to replace the original seals with the included ones so I can’t vouch for the fitment but overall I am super happy with the product and ease of installation!
R**O
Pistones de freno hidráulico
Hace dos meses que los tengo y asta ahora funcionan bien.
K**N
Replacement Ceramic piston for Shimano XT BR-M8000 Calipers
Hey,So I broke my piston, and it got jammed in the caliper. This kit provided 2 new replacement calipers, and they are perfect!There is 1 "O" ring missing for my brake calipers, so don't throw your rubber rings away until you complete the rebuild.Great kit! and now they work great!Thanks
C**R
Great, especially during parts shortage
I used these off-label to replace a broken ceramic piston in a BR RS505. The flat ring and piston fit perfectly. The o-ring for the caliper fluid channel is too small for the 505, but the outer rubber washer does fit on the bolt.
Trustpilot
3 weeks ago
5 days ago
