Home255/75R17 vs 265/70R17

255/75R17 vs 265/70R17

The 265/70R17 is 31.61 in tall: 0.45 in (1.4%) shorter than the 255/75R17 at 32.06 in. At an indicated 60 mph you'd be doing 59.2 mph.The 265/70R17 is 802.8 mm tall: 11.5 mm (1.4%) shorter than the 255/75R17 at 814.3 mm. At an indicated 100 km/h you'd be doing 98.6 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

Width and aspect ratio both change (255/75 to 265/70). The 265/70R17 is 0.39 in wider, but each sidewall is 0.23 in shorter, so it ends up 0.45 in shorter overall.

Makers' own measured diameters run 32.0 to 32.28 in for the 255/75R17 and 31.57 to 31.97 in for the 265/70R17, against the calculated 32.06 in and 31.61 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 255/75R17 reads high on the 265/70R17: an indicated 60 mph is a true 59.2 mph.A speedometer that read true on the 255/75R17 reads high on the 265/70R17: an indicated 100 km/h is a true 98.6 km/h.

The odometer records about 10,140 miles for every 10,000 you drive.The odometer records about 10,140 km for every 10,000 you drive.

Ground clearance and size class

Ground clearance at the axle drops by 0.23 in: half the diameter change, unloaded.Ground clearance at the axle drops by 5.8 mm: half the diameter change, unloaded. By calculated diameter both are 32-inch tires.

See every 32-inch size in metric.

Other comparisons with these sizes

• 265/70R17 vs 285/70R17
• 265/70R17 vs 275/70R17
• 265/70R17 vs 285/75R17
• 265/70R17 vs 265/75R17
• 245/75R17 vs 265/70R17

Compare other sizes in the calculator