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.

Key features:
  • - Comparison between two tire (tyres) sizes, either can be metric or imperial (US)
  • - List of possible tire equivalents and alternatives
  • - Option to change suspension parameters (fender clearance, scrub radius, suspension clearance, wheel well clearance)
  • - Car Performance option: find out how changing your tire size affects your car’s performance using text explanations
  • - Tire Plus / Minus sizing option
  • - The ability to use only those tire sizes that are on sale. Non-existent tire sizes will not be offered for selection
  • - Using Tire Designations: ISO Metric, LT High Flotation
Note: Dimensions displayed are calculated using industry-standard tire sizing specifications:
  • • ISO 4000-1, ISO 4000-2 Passenger car tyres and rims / Tyres / Rims
  • • ISO 8855 Road vehicles / Vehicle dynamics and road-holding ability