Fits 26″ 27.5″(650B) & 700C Wheels w/ Disc Brakes Topeak’s toughest tubular aluminum rear rack designed for heavy-duty long distance touring. Specifically developed for bikes equipped with disc brakes. Integrated side bar provides a lower pannier attachment point-allowing more space for cargo on the rack top. QuickTrack compatible for use with any MTX TrunkBag rear basket and pannier bag.