TOM rear wheel General specifications: Colour: silver Inch size: 28 inch Bicycle type: city bike Brake type: roller brake Position: rear Rim specifications: Type: Ryde ZAC2000 Material: aluminium Outer width: 24.6 mm Inner width: 19 mm Rim height: 21.5 mm Rim flange: yes Rim flange height: 10.5 mm Valve hole: 8.5 mm Spoke specifications: Number: 36 Spoke thickness: 13G (2.34 mm) Material: Stainless steel Hub specifications: Hub type: Shimano FH-IM70 Installation width: 110 mm Gears: 8/9V Axle length: 160 mm Material: steel