Shimano rt76 disc rotor 6 boltshimano developed this xt disc brake rotor to get the best performance from your brake, whilst also prolonging brake pad life. This is achieved thanks to its advanced pad contact surface, which aids pad clearance. It also offers a cooling effect on the pads and brake caliper, preventing the dreaded ldquobrake faderdquo towards the end of a long descent on the trails.precision cut disc rotorprecision cut from stainless steel, this disc rotor improves braking performance in muddy conditions whilst aiding cooling under high load. A large forged alloy spider on the shimano xt rt76 6 bolt rotor supports its surface and works to decrease overall weight increase rigidity.reasons to buy get the best performance from your brake. Prolong your brake pad life. Reduced heat build up. Superior braking in muddy conditions.features material stainless steel and forged alloy mount 6 bolt compatibility all shimano mtb disc brakes deore, slx, xt or xtr large forged alloy spider supports rotor surface, increasing rigidity and reducing weight comes complete with mounting hardware sold individually weight 138g 160mmmanufacturer reference codes 160mm smrt76s 180mm smrt76m 203mm smrt76la 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.