Made from alloy. Excellent quality strong wheels and good rubber soft grip tyres. Tyres will require gluing to the wheel. These will fit some 1.10 models however not all. Please check the measurements below before ordering to ensure a fit. Hex hub 12mm measured across the flats. Hex hub 12mm measured across the flats. M12 socket. Outer diameter 64.55mm. Inner diameter 45.4mm. 26.56mm wide. 10mm offset.