Fits 26″, 27.5″(650B) & 700C Wheels with Disc Brakes The Super Tourist DX2.0 is Topeak’s toughest tubular aluminum rear rack designed for heavy-duty, long distance touring and is specifically developed for bikes equipped with disc brakes. The integrated Side Bar provides a lower pannier attachment point, allowing more space for cargo on the rack top. This rack is QuickTrack compatible for use with any MTX TrunkBag, rear basket and pannier bag.