Calculator disclaimer

Dimensions are not a fitment guarantee

Tire and wheel outputs use nominal dimensions. Actual fitment depends on wheel width, offset, suspension, arch and brake clearance, load rating, speed rating, construction and manufacturer requirements. Have modifications verified by a qualified professional. A percentage threshold in a calculator is not a safety approval.

Comfort is qualitative

Sidewall comparisons describe geometric differences and possible trade-offs. They do not measure comfort, grip, braking distance or handling. There is no universal numerical comfort improvement associated with a size change.

Costs are scenarios

Fuel and ownership results are informational estimates based on your inputs. They do not forecast prices, depreciation, reliability or investment returns. Taxes, incentives, finance and other unmodelled costs can materially change the outcome.

Check the source data

Use the vehicle placard, manual and manufacturer specifications for your exact market and variant. No model-specific compatibility or specification database is currently published here.