Wheel Center Bore
Tires & Wheels · 7 specs
Direct Answer
The Wheel Center Bore (measured in millimeters to 0.1 mm precision) is the machined center opening on the back of a wheel designed to fit snugly over the vehicle's raised wheel hub snout. Ensuring the wheel is mounted 'hub-centrically' (bearing vehicle weight on the center hub collar rather than the lug bolts), preventing high-speed vibrations.
Source: SAE J109 / ETRTO / Vehicle Manufacturer Engineering Blueprints · Last reviewed Aug 28, 2026
Specs
| Hub-Centric Engineering Function | Center hub collar centers the wheel with zero eccentricity and supports vehicle radial shear loads |
| Volkswagen / Audi (VAG MQB) | 57.1 mm center bore (VW Golf, Jetta, GTI, Audi A3, TT) |
| Audi / Mercedes-Benz / BMW G-Chassis | 66.6 mm / 66.56 mm center bore (Audi A4/A6/S4 MLB platform, Mercedes C/E-Class, modern BMW) |
| BMW Classic (E & F Chassis) | 72.6 mm (standard BMW hub) | BMW E39 5-Series exception: 74.1 mm |
| Subaru / Toyota GT86 | 56.1 mm center bore |
| Honda / Acura / Nissan | 64.1 mm (Honda/Acura) | 66.1 mm (Nissan/Infiniti) | 60.1 mm (Toyota standard) |
| Hub-Centric Rings (Spigot Rings) | Machined aluminum or polycarbonate adapter rings (e.g. 73.1mm aftermarket wheel bore -> 57.1mm VW hub) |
Why Lug-Centric Mounting Vibrates
Aftermarket wheels are intentionally manufactured with oversized center bores (such as 73.1 mm) to fit multiple vehicle brands. Mounting a 73.1 mm wheel onto a 57.1 mm VW hub relying solely on conical lug bolts ('lug-centric') results in slight micro-misalignment off-axis, causing annoying steering wheel vibrations at 60–80 mph (100–130 km/h). Installing precision aluminum hub-centric rings eliminates the gap completely.