- R stands for rally - Asymmetric rims and same length spokes for nearly even left/right tension - 30mm ID, 34mm OD double wall 6069 aluminum rim (40% stronger than 6061) - Tubeless ready rims, tires mount easily without a compressor - Wide bearing stance for reduced radial loading - Hub end caps are easily replaced to fit virtually any axle standard - 120-point, 6x3-pawl system engages every 3 degrees - International Standard 6-bolt disc rotor mount