This is basically a second helmet inside your helmet

Weight: Approx 522g

Cons: The GR-501's rate a 2 out of 11 stiffness rating means that they aren't the most efficient pedallers out there

5" - 1 1/8"

Galfer Shark Centrelock Disc Brake Rotor - 160mm - Centrelock - 1.8mm PLP|Model Year This is basically a secondGalfer's shark fins, together with the rotors small internal round holes allow the operating temperature of the disc to be reduced to ensure consistent braking power. Specs: 160mm 1. 8mm thick 121g 180mm 2. 0mm thick 127g 203mm 2. 0mm thick 174g 223mm 2. 0mm thick 237g The key features of the Shark design are: Small round holes in the rotor to increase the dissipation area of the disk. Exterior Wave design and big windows to increase grip and keep the