Wheel bolts for HGVs: specification, torque, and safety
Wheel bolts on HGVs are safety-critical fasteners. Getting the specification wrong creates a serious risk of wheel detachment. The correct bolt has the right thread diameter and pitch, the right shank length for the wheel flange thickness, the right seat angle (conical or flat) for the wheel, and the correct material grade for the axle load.
On most European HGVs, M22 x 1.5 is the standard front steer axle thread and M20 x 1.5 is common on rear drive axles, but this varies by manufacturer and model. Do not assume: cross-reference the existing bolt part number or the chassis specification before ordering.
Frequently Asked Questions
How do I know which wheel bolt specification fits my HGV?
The thread diameter, thread pitch, shank length, and seat type must all match the hub and wheel specification. The easiest approach is to take the OE part number from an existing bolt. If that is not available, consult the chassis manufacturer's workshop manual or call us on 01527 598 000 with the make, model, and axle position.
What torque should HGV wheel nuts be tightened to?
Torque values are specified by the chassis manufacturer and vary by axle type and bolt size. Common values are in the range of 500 to 650Nm for rear axle wheel nuts on heavy-duty trucks, but always use the manufacturer's specified value for the specific application.
Should I replace all wheel bolts or just the damaged ones?
If bolts are being replaced because of age or corrosion across the hub, replace the full set to ensure uniform clamping. Never mix old and new bolts in the same hub.
How often should wheel bolts be inspected on an HGV?
DVSA walking-around check guidance recommends checking wheel fixings as part of the daily vehicle check. Bolts should be inspected for corrosion, cracking, or thread damage at every scheduled service. Any bolt showing damage or that has been removed and refitted multiple times should be replaced.
