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275/70R18 in inches

A 275/70R18 is 33.16 in (842.2 mm) tall and 10.83 in (275 mm) wide, with a 7.58 in sidewall on an 18 in wheel. By calculated diameter it's a 33-inch tire, 0.16 in over 33 in.

By David Owen. Published 3 November 2026.

in, mphmm, km/h

These are size-code figures only. Whether a size fits, clears and carries your load depends on your vehicle and the tire, so check with a tire shop.

Makers' own measured figures for this size run 33.19 to 33.62 in tall and 617 to 626 revolutions per mile (calculated: 608). The calculated figures come from the size code alone; real tires vary by brand and tread design.

Is the 275/70R18 a 33-inch tire?

By calculated diameter, yes: 33.16 in rounds to 33. See every 33-inch tire in metric.

On an 18 in wheel, the nearest catalogue sizes by calculated diameter are 235/80R18 (32.80 in) below and 325/60R18 (33.35 in) above.

Searched comparisons with the 275/70R18

Diameter change is the second size against the first, as each comparison is searched.

Compare the 275/70R18 with any size in the calculator