TOM rear wheel General specifications: Colour: black Inch size: 28 ETRTO size: 19-622 Weight: 3040 grams Brake type: coaster brake Type of bicycle: city bike Rim specifications: Width: 24.3 mm Inner width: 19 mm Height: 17 mm Material: aluminium Equipped with rim flange: no Valve hole: 8 mm Spoke specifications: Number: 36 Thickness: 2.3 mm Material: Stainless steel Hub specifications: Installation width: 130 mm Material: steel Number of gears: 8 Gear hub: Shimano Nexus Axle length: 180 mm