Tire Size Chart — Metric & Inches

What it does

A table of commercial metric sizes grouped by rim (15–22") plus common flotation sizes. Each row is overall height, width, sidewall and revs per mile from the same ISO 4000-1 engine as the tire size calculator — not a second formula.

How to use it

Jump to a rim section. The metric name opens the calculator with that size loaded. “Shop” goes to the catalog size page when the slug is a real /tires/{digits} route. Stock is decided there, not here.

How to read the result

275/60R20 is 275 mm section width, sidewall = 60% of that width, radial construction, 20" rim. The inch column is exact unloaded geometry (32.99x10.83R20), not a size you can order. Revs per mile are theoretical, on an unloaded tire.