TIRE & WHEEL LAB
Tire Alternatives Finder
Find dimensionally similar sizes. Start with diameter, then check the wheel and vehicle requirements with a tire professional.
Your results
LIVE CALCULATIONResults will appear here when JavaScript loads. See the worked example below for a reference calculation.
How this calculator works
Each candidate is filtered by |candidate diameter ÷ original diameter − 1| × 100 ≤ your selected limit. Results are sorted by absolute diameter difference.
Read the full methodology for definitions, conversion factors and limitations.
Worked example
215/55 R16 is 11 mm taller than 205/55 R16, a 1.74% difference. It appears with a 2% filter but not a 1% filter.
Before you act on the result
Tire and wheel dimensions cannot confirm fitment. Check wheel width, offset, suspension and wheel arch clearance, load and speed ratings, and manufacturer recommendations. Ask a qualified tire professional to verify modifications. Actual tire measurements vary with construction, pressure, load and wear.
Frequently asked questions
Are all suggested sizes sold?
No. This is a geometric search across metric size combinations, not a stock catalogue. Confirm that the exact size, load rating and speed rating are available.
Is the 3% limit a safety standard?
No. It is a search filter, not a universal approval threshold. Your manufacturer may specify much tighter limits, particularly for AWD vehicles.