Home275/55R20 vs 275/60R20

275/55R20 vs 275/60R20

The 275/60R20 is 32.99 in tall: 1.08 in (3.4%) taller than the 275/55R20 at 31.91 in. At an indicated 60 mph you'd be doing 62.0 mph.The 275/60R20 is 838.0 mm tall: 27.5 mm (3.4%) taller than the 275/55R20 at 810.5 mm. At an indicated 100 km/h you'd be doing 103.4 km/h.

By David Owen. Published 3 November 2026.

in, mphmm, km/h

Each figure is rounded separately, so related figures can differ in the last digit.

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.

What changes

The width stays at 10.83 in; the aspect ratio goes from 55 to 60. Each sidewall goes from 5.95 in to 6.50 in, and with one sidewall above the wheel and one below, the overall diameter goes from 31.91 in to 32.99 in.

Makers' own measured diameters run 31.89 to 32.13 in for the 275/55R20 and 32.99 to 33.03 in for the 275/60R20, against the calculated 31.91 in and 32.99 in. Real tires vary by brand and tread design; the figures in the table come from the size code alone.

Speedometer and odometer

A speedometer that read true on the 275/55R20 reads low on the 275/60R20: an indicated 60 mph is a true 62.0 mph.A speedometer that read true on the 275/55R20 reads low on the 275/60R20: an indicated 100 km/h is a true 103.4 km/h.

The odometer records about 9,670 miles for every 10,000 you drive.The odometer records about 9,670 km for every 10,000 you drive.

Ground clearance and size class

Ground clearance at the axle rises by 0.54 in: half the diameter change, unloaded.Ground clearance at the axle rises by 13.8 mm: half the diameter change, unloaded. By calculated diameter the 275/55R20 is a 32-inch tire and the 275/60R20 a 33-inch tire.

See every 32-inch and 33-inch size in metric.

Same change, other sizes

2 other searched pairs make the same change in diameter, width and sidewall:

• 275/65R18 vs 275/70R18
• 275/60R20 vs 275/65R20

Other comparisons with these sizes

• 275/55R20 vs 285/55R20
• 275/60R20 vs 285/60R20
• 275/60R20 vs 295/60R20
• 265/50R20 vs 275/55R20

Compare other sizes in the calculator