Observed arrival · 2026-10-30
TireSpan’s tire and wheel calculators
A browser-based set of calculators compares tire sizes and wheel width and offset, with downloadable results.
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- For
- Drivers comparing tire sizes or wheel offsets
- Worth noticing
- Offset guidance defines outward as positive and warns that nominal positions do not establish clearance to vehicle parts.
Field notes
The tire comparison shows diameter, width, sidewall, circumference, and revolutions per distance, alongside a theoretical speed table. A separate wheel section defines inner distance as width ÷ 2 + ET and outer distance as width ÷ 2 − ET, while cautioning that these nominal measurements do not establish actual vehicle clearance. The page offers JSON export and says saved comparisons stay in the current browser.
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Editorial observations of this landing page, not a rating.
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✦PrettyNotable craft visible
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