DT Swiss XRC 310 Rim - 29" Disc Carbon Tubeless Hookless 28HDT Swiss XRC 310 Rim 29" Disc Carbon Tubeless Hookless 28H. The XRC 310 carbon rim allows riders to break records not backs. For riders committed to constant improvement the XRC 310 is your gateway to the top. Enjoy snappy acceleration and finely tuned agility driving you to the forefront of the pack. A cutting edge technique maximizes carbon layer compression resulting in DTs lightest carbon MTB rim to date. Now the opportunity is yours to set and