Roland front wheel General specifications: Color: silver Inch size: 20 x 1.75 inch Bicycle type: children's bicycle Brake type: roller brake Weight: 1750 grams The front wheel has a roller brake connection. The front wheel is supplied without the roller brake plate. Rim specifications: Width: 24.6 mm Height: 15.5 mm Material: aluminum Valve hole: 8.5 mm Equipped with rim flange: no Spoke specifications: Number: 36 Spoke thickness: 13G (2.3 mm) Material: steel Front hub specifications: Front hub type: Shimano Nexus (DH-C600-3R-N) Installation width: 95 mm Axle length: 145 mm Material: steel