Our 500 series differential bore 4 piston caliper continues to be unmatched for performance and value. Utilizing a smaller diameter piston at the lead-in of the rotor and a larger piston on the trailing side provides optimum friction dynamics by equalizing the heat distrution throughout the brake pad to rotor interface. In addition, the differential bor ratio and total volumetric displacement are correctly sized to promote the best brake caliper response and brake lever feel. We also employ dualpiston seals providing each piston with 2 layers of protection from contamination promoting long term leak proof operation. In addition, this sealing system improves piston pullback which reduces brake pad drag on the rotor. Recent improvements include a specially designed brake pad retainer providing quiet operation and an improved brake pad compound promoting longer life and less pad dust.
* Will Not Fit Springers 1988up.
* Will Not Fit V-Rod 2006up.