Decision Tools & Data

Seller-provided wheel specifications are useful only if they are complete, internally consistent, and matched to the correct vehicle fitment requirements. Before treating a listing...

Calculator Says It Fits: What Still Requires a Physical Test A fitment calculator can show that a wheel is theoretically compatible with a vehicle. It cannot prove that the assembl...

The decision: what offset will the wheel have after the spacer? For a conventional spacer installed between the wheel and hub, calculate effective offset with: \[ \text{Effective o...

Two websites can list different wheel specifications without either being completely wrong. One may report the manufacturer’s nominal dimensions, another may contain a user measure...

What the effective offset tells you Effective offset is the wheel’s offset after an adapter or spacer changes the location of the wheel mounting face. It is used to estimate where ...