Bickerton /Tern 20" 406 Wheels Pair Q-release Cassette type freehub, Shimano/Sram etc. compatible. Doublewall Silver rims with Silver stainless steel spokes, 20 Front 28 Rear. Rear Q-release Hub Silver suit 8/9/10 speed, Front Q-release Hub Silver. Hub Width 135mm Rear, 74mm Front. Q-release Skewers supplied.