Graves Motorsports Captive Rear Wheel Spacer Kits. Built using R&D from the WORKS Graves team bikes. These spacer kits replace your wheels oem spacers with push in interlocking wheel spacers that stay in place. Great for quick change wheels, endurance racing and smooth wheels changing in general.
We have fitment for Kawasaki = ZX-4RR, Ninja 400, ZX--6R and ZX-10R / Yamaha = R3, R6, R7 and R1
www.gravesport.com