Brake Rotor Floating Wave Brake Rotor Floating Wave, Harley Davidson, Front, Rotor Diameter(Outer) 300mm, Inner Diameter 138,5mm, Thickness 5mm Lower weight of the unsprung masses. Better heat dissipation. More braking power Excellent resistance to corrosion. Less tendency to warp. Maintains cleaner the contact surface pad-disc. Improve and personalize the motorcycle esthetic.