For finding the better speed and performance, we tried to make the wheels unique. We designed a new brake surface technology, called "ArrowTech". Engraving the many arrow shape nicks with CNC technical machined on the brake surface, it offers the damping capacity and increasing the braking force, even on the wet road. What's more, the SWR's 19mm internal width is for running wider tires at reduced air pressure. Also with Aerodynamic shape and light material which offers precise movement and control. With our carbon fiber engineering, and producing rims in 100% handcraft. CRODER SWR wheel series could fuels your spirit.