WH-MT66-29 wheels*Available Sept. 2012 The new WH-MT66-29 wheel set delivers quality, dependability and sets the standard for 29er wheel stiffness and weight balance with purpose built 24x28H lacing balancing front vs. rear wheel loads. The wheels feature a new tubeless-compatible 19C rim structure that is UST and standard tire compatible. The 29” wheel set is available in 135mm QR or 142x12mm E-thru rear spacing and front 15mm E-thru.