Using Evotech Performance's experience and innovative design, Evotech Rear Spindle Bobbins for the Kawasaki Ninja ZX-10R offer robust protection for your motorcycle. The nylon bobbin head is strengthened by an aluminium inner, and held in place using a stainless steel through-rod. Should an incident occur, the bobbin is expected to take impact first and should rotate to reduce stress and minimise damage on the rear wheel.