Galespeed Kawasaki”OVERSIZED” ZX-4RR / ZX-4R front brake rotor (left).These are 310mm and not direct stock replacements. You must buy the spacer kit listed below to use these OVERSIZED ROTORS. The Galespeed oversize rotors increase overall braking performance, run cooler with improved stability over a wider range of temperatures and have improved rider feel at the lever during trail braking. Note: This listing is for the left side only.

310mm Size (20mm larger than stock) :This rotor can only be used with the separately listed spacer and bolt kit listed below.
The “CROSS Lock” disc design
Outer disc and inner disc are fixed in vertical direction, to reduce the backlash in rotation direction and absorb the heat expansion
GALESPEED original “Dual-bite” clip reduces the backlash in axial direction
Fully CNC machined forged aluminum made inner disc lightened to the maximum,yet still high stiffness
Ventilation holes are drilled with the suitable diameter and in the suitable places, to achieve the best heat ventilation.

Fitment:ZX-4RR / ZX-4R 2023 +