Urban brake - the universal brake for max. 4x80mm (size Small), 4x90mm (size Medium) or 3x110mm (Size Large) setups A lot of skates come without brake. We at Powerslide care about your safety and developed several kinds of universal brakes that can be easily added to your current skates. The urban brake can be used on most common frames in the market. The brake includes all necessary hardware and fits all common 4x80mm or smaller (Small), 4x 84mm or 4x90mm (Medium) and 3x110mm (Large) frames. It takes about two minutes to assemble the brake. The brake pad is made of long lasting NR SBR material, a mix of natural and artificial rubber blends.