29er (bicycle)

29er (bicycle)

29ers or two-niners are mountain bikes that are built to use 700c or 622 mm ISO (inside rim diameter) wheels, commonly called 29" wheels. Most mountain bikes use ISO 559 mm wheels, commonly called 26" wheels. The ISO 622 mm wheel is typically also used for road-racing, trekking, cyclo-cross, touring and hybrid bicycles. In some countries, mainly in Continental Europe, ISO 622 mm wheels are commonly called 28" wheels or "28 Incher".