When to use it
Use it before switching to wider wheels, changing offset, adding spacers, lowering a vehicle, or comparing two wheel and tire packages for clearance risk.
Free wheel fitment calculator
Free Rim Offset Calculator
A rim offset calculator compares wheel width and offset to estimate inner clearance, outer poke, backspacing, and track width changes before you buy or mount a new setup.
Formula
half width +/- offset = inner clearance and poke
Use it to compare a daily driver, carpool vehicle, or project car setup before committing to wheels that may rub.
Compare wheel fitment
Enter the current and new wheel width and offset to estimate inner clearance, outer poke, backspacing, and track width changes.
Fitment callout
Aggressive fitment
9.05 mm less inner clearance; 29.05 mm more outer poke.
- Inner change
- 9.05 mm
- Outer poke
- 29.05 mm
- Track width
- 58.1 mm
- New backspace
- 6.13 in
Current backspacing5.77 in
New front spacing3.37 in
Inner lip position155.65 mm from hub
Outer lip position85.65 mm from hub
RideVillage rim offset comparison: 9.05 mm less inner clearance, 29.05 mm more outer poke, 58.1 mm track width change, and aggressive fitment.
What it includes
The estimate includes inner lip position, outer lip position, inner clearance change, outer poke, track width change, backspacing, and a fitment recommendation.
Keep rides coordinated
RideVillage helps families coordinate school and activity carpools with shared schedules, fair rotations, swaps, and reminders once the vehicle setup is ready.
Start a carpoolRim Offset Calculator FAQ
What is a rim offset calculator?
A rim offset calculator compares two wheel setups and estimates how far the new wheel moves toward the suspension, how much farther it pokes outward, and how backspacing changes.
How does wheel offset affect fitment?
More positive offset usually moves the wheel inward toward the suspension. Lower or negative offset usually pushes the wheel outward toward the fender.
What is inner clearance?
Inner clearance is the space between the inside of the wheel or tire and nearby suspension, brake, or body components. Losing too much clearance can cause rubbing.
Should I test fit aggressive wheel offsets?
Yes. Any setup with large poke, reduced inner clearance, wider tires, lowered suspension, or unknown brake clearance should be test fitted before regular driving.