Front wheel spacer Sold individually Ffor Motovox MBX10 and MBX11 Mini Bikes May fit other models This front wheel inner spacer for the MBX10 and MBX11 mini bikes is available by itself This is an OEM replacement part from Motovox and the spacer is 1-19/32″ in overall length and has an inner diameter measurement of 1/2″. This front wheel inner spacer for the MBX10 and MBX11 mini bikes is available by itself. This is an OEM replacement part from Motovox and the spacer is 1-19/32″ in overall length and has an inner diameter measurement of 1/2″. Specifications Length: 1-19/32″ Inner Diameter: 1/2″