The lever principle tells us that the further the brake clamp is away from the disc, the stronger the braking force is generated and the less pedal force is required. Lightweight split brake disc reduces the weight of the disc; The marking disc design helps to draw away the brake dust generated at high temperature friction, to avoid them remaining between the brake skin and the brake disc, reducing the friction coefficient; SAVANINI increase the brake disc adopts GG20 standard high carbon alloy cast iron marking disc carbon content 3.5% after aging heat treatment to prevent high temperature deformation of the brake disc, featuring high toughness friction coefficient high temperature resistance not easy deformation can be used on the track, the closing head adopts lightweight forged high performance aluminum alloy material to effectively reduce the spring weight, improve the comfort of control. CNC high precision turning, full floating stainless steel closed head screws, free expansion and contraction to eliminate gravity without shaking.