Roland back wheel General specifications: Colour: silver Material: aluminium Size: 24 inch Type of bike: children's bike Brake type: rim brake Position: behind Weight: 1060 grams Specifications rim: Width: 24.6 mm Inside width: 18.6 mm Height: 15.6 mm Valve hole: 8.2 mm With rim flange: yes Specifications spokes: Number of spokes: 36 Spoke thickness: 13G (2.3 mm) Specifications hub: Type: freewheel Installation width: 110 mm Axle length: 160 mm Material: steel