Can we increase the aerodynamic penetration of the racing bike? You bet we can. Our SLR series wheels improve aerodynamics thanks to the wider channel (21 mm for SLR42 and 19 mm for SLR38) and 38 and 42-mm optimized profiles. The thickness of the carbon profile is different in different parts of the rim area, thicker where the spoke and the nipple are inserted. The rim is tubeless ready.