Rim & Tire Size Calculator

See how changing your tire size affects your car’s performance. Our wheel size calculator is the most comprehensive tire comparison tool suitable for passenger cars, SUVs, and Vans.

Our standard fitment data includes:

- Vehicle description and attributes
- Original Equipment tire and wheel fitment for cars and LCV’s
- Aftermarket / Optional (manufacturer optional sizes) tire and wheel fitments
- Run-flat, Commercial Tires, Steel Rims and Recommended for winter fitment markers
- Load Index and Speed Rating

- Offset value (ET)
- Vehicle Generation, Production Years
- Vehicle Region
- Power
- Engine type, fuel type, engine code
- Trim Levels / Options
- Center Bore
- Thread Size

- Wheel Fasteners (lock type: lug nuts / bolts)
- Wheel Torque Tightening
- Tire Pressure
- Vehicle Images
- Aftermarket upsteps for both wheel and tire
- Winter-wheel downsizing