This is a high-quality alloy rim that is tougher than most, with added protection at the bead-walls for impact resistance and reduced sidewall cuts. The nipple/spoke bed is oriented to the spoke direction to reduce weakness caused by a bend in the spoke at the nipple hole. The PHASE30 is made with premium alloy, extruded and carefully formed for consistent shape. It is then fusion welded and ground for a strong, precise finish. Chromag's fusion welding system leaves a perfect seamless joint that becomes the strongest section of the rim, ensuring that your rim won’t split at the seam if you have an impact there.