From Trailhead to Podium The lightest and fastest mountain bike wheels we make, the XC-27s are made for cross-country speed, pure and simple. Highlights The internal width of a 27mm hookless carbon rim creates a stronger, more stable footprint, creating speed and confidence Built with DT Swiss Aerolite spokes for reduced weight and increased strength Built with our custom straight pull HollowGram hub shell and reliable sealed cartridge bearings for ease of service and performance At 1350g a pair the XC-SL 27 is impressively lightweight and durable A limited lifetime warranty to give you peace of mind Lefty Ocho, 2.0, Supermax & Boost compatible