The Slim by Four is a BMX-specific brake pad with a symmetrical shape designed for both forwards and backwards braking. A custom inner frame helps to stiffen the pad and prevents excessive braking power from being lost to flex. SPECS - Clear and Gum colored “Soft” compound pads provide extra grip on powder coated rims. - Black “Normal” compound Slim-By-Four pads are the most popular pad choice for most riders.