The Rapid Rob tire is a top choice for rookies. The old dream-pairing reunited, based on the former profile of the Racing Ralph and for many years it has proved an attractive entry-level model tire for off-road. Item Specifications: Flat Protection: Tread, Color: Black, Defined Color: Black, ISO Width (mm): 53, ISO Diameter: 622 / Road / 29", Tire Intended Use: Mountain, Tire Diameter: 29", Tire Bead: Wire, Labeled Size: 29 x 2.10, Tire Type: Clincher,