Measurement & Verification

What needs to be measured–and why A wheel stud or wheel bolt has two thread dimensions: Nominal diameter: the approximate outside diameter of the male threads. Thread pitch: the d...

A 5-lug wheel’s PCD is the diameter of the imaginary circle that passes through the centers of its five lug holes. It is usually written as 5 × [diameter], such as 5 × 114.3 mm. Be...

A donor wheel is safe only if its load capacity meets the load expected at that wheel and it fits the vehicle correctly. Diameter, bolt pattern, and appearance do not establish loa...

What to measure–and why To verify a wheel spacer’s advertised thickness, measure the distance between its two flat mounting faces: the face that contacts the vehicle hub and the fa...

An adapter’s label tells you the conversion it is intended to provide; measuring the adapter tells you whether the part in your hands matches that conversion. Check both bolt patte...

Used-wheel photos can help you screen a listing, read some specifications, and spot visible damage. They cannot prove that a wheel is straight, leak-free, structurally sound, or co...

Wheel width is the distance between the wheel’s tire bead-seat surfaces, not the full distance across its outer lips. Getting that distinction right matters: width, together with o...

Center-cap clearance depends on two things: how far the cap extends behind the wheel’s mounting face, and how far the vehicle’s hub or axle hardware projects beyond the hub’s wheel...

What you need to measure–and why The vehicle hub diameter is the outside diameter of the raised cylindrical pilot on the hub. That pilot fits inside the wheel’s center bore and hel...

A hub-centric ring must match two separate diameters: its outside diameter (OD) fits the wheel’s center bore, and its inside diameter (ID) fits over the vehicle’s hub pilot. Measur...