Boasting a 30mm internal rim width and increased strength, the Aeffect R is built to shred aggressive all-mountain trails and Enduro races. In addition to a great rim, the Aeffect R incorporates a new Race Face Trace hub design with full cartridge bearings for extended life and durability. The hub also boasts a competitive 9.2-degrees of engagement using a durable the 3 pawl design. These hubs are tough, think a clydesdale with a motor kind of tough. Aeffect wheels can handle almost anything you can throw at them.