Shimano R501 wheelset General specifications: Colour: black, red Bicycle type: racing bike Size: 28 inch ETRTO size: 622x15C Number of speeds: suitable for 8/9/10-speed Brake type: rim brake Position: set Set weight: 1889 grams Rim specifications: Material: aluminium Rim height: 24 mm Rim width outside: 20.8 mm Rim width inside: 15 mm Valve hole: 6.5 mm Equipped with rim flange: yes Spoke specifications: Number front: 20 Number rear: 24 Spoke thickness: 14G (2 mm) Spoke length front: 278 mm Spoke length rear: 286 mm Material: Stainless steel Front hub specifications: Material: aluminium Axle type: 9 x 100 mm quick release Axle length: 108 mm Quick release length: 133 mm Rear hub specifications: Material: aluminium Freehub material: steel Axle type: 10 x 130 mm quick release Length axle: 141 mm Length quick release: 163 mm Contents: 1 Front wheel 1 Rear wheel 2 Rim tapes 2 Quick releases