With its 24mm internal rim width, the Race Face Aeffect-SL 29" rear wheel is optimized for the rigors of cross country and trail riding. In addition to a great rim, the Aeffect-SL incorporates the 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, 3-pawl design. This hub is tough - think a Clydesdale with a motor kind of tough - and can handle whatever you dish out on the trails. Aluminum rim with 24mm internal width optimized for cross country and trail riding 28 straight pull, double-butted spokes in 3x lacing pattern for strength and reliability 12x142mm thru-axle hub configuration Tubeless ready Shimano-compatible cassette body 6-bolt disc rotor compatible Brushed finish with water transfer graphics Front and rear Aeffect-SL wheels utilize just one spoke length for easier maintenance -- 5 extra spokes are included with rear wheel