Shimano slx m7000 disc brake caliperthe brake caliper features a short stroke servo wave mechanism for quick pad engagement and more power for aggressive riding shim less mounting system allows for quick setting up oversized 22mm twin phenolic pistons are optimised for heat insulation light weight and stiffness features oversized 22mm glass fibre phenolic pistons optimised for heat insulation light weight and stiffness opposed 2 piston design reduces leading effect and optimal pad wear inc