Ultimate Cross Country Race wheelset. 26mm wide asymmetric rims, built on Vittoria’s new SwitchIT 2 MTB hub, with Centerlock disc mount (convertible with 6-bolt adapter), SRAM or Shimano cassette body available. New SwitchIT 2 freewheel design with 4 integrated pawls @ 12degree engagement angle. The patented Speedlock rim-bed profile securely supports tubeless tires even at low pressure.