Motorbike MX Tyres. Scooter Tyres. Hubcentric wheel spacers Kits. Bolts (Imperial). Locking Wheel Bolts. The spacers are a nice one piece billet aluminium with a 4x100 PCD with a centre bore of 56.1mm the bolts are 43mm Thread with a Tapered Seat for OEM Alloy Wheels.