RSD has taken the best of brake caliper technology, high quality precision machining and trademark RSD styling to create the next step up in braking power for your V-Twin. With GP racing architecture and weight distribution, the extra rigidity maximizes your effort at the brake lever, stopping you faster with more feel. RSD brake calipers coupled with RSD Radial master cylinders are the ultimate V-twin braking system providing unparalleled feel and power.