Shimano Deore XT BR-M8200 Disc Brake Caliper The Best Braking If you're looking for the best braking performance out there, then look no further than Shimano XT. XT brakes have been the pinnacle of braking performance for mountain bikes for many years now. The Shimano Deore XT BR-M8200 Disc Brake Caliper takes the extremely powerful caliper and makes it even better. This updated version comes with high-performance resin pistons that are much more durable than ceramic pistons. The M8200 comes with 2 pistons that are best for XC and trail riding. Features Brand-new low-viscosity mineral oil and seal architecture High-performance resin pistons that are more durable than ceramic pistons2 pistons for XC and trail riding | Shimano | Deore Xt Br-M8200 Disc Brake Caliper Two Piston, Front Or Rear