Home265/60R18 vs 265/65R18

265/60R18 vs 265/65R18

The 265/65R18 is 31.56 in tall: 1.04 in (3.4%) taller than the 265/60R18 at 30.52 in. At an indicated 60 mph you'd be doing 62.1 mph.The 265/65R18 is 801.7 mm tall: 26.5 mm (3.4%) taller than the 265/60R18 at 775.2 mm. At an indicated 100 km/h you'd be doing 103.4 km/h.

By David Owen.

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 10.43 in; the aspect ratio goes from 60 to 65. Each sidewall goes from 6.26 in to 6.78 in, and with one sidewall above the wheel and one below, the overall diameter goes from 30.52 in to 31.56 in.

Makers' own measured diameters run 30.5 to 30.60 in for the 265/60R18 and 31.5 to 31.6 in for the 265/65R18, against the calculated 30.52 in and 31.56 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 265/60R18 reads low on the 265/65R18: an indicated 60 mph is a true 62.1 mph.A speedometer that read true on the 265/60R18 reads low on the 265/65R18: 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 0.52 in: half the diameter change, unloaded.Ground clearance at the axle rises by 13.3 mm: half the diameter change, unloaded. By calculated diameter the 265/60R18 is a 31-inch tire and the 265/65R18 a 32-inch tire.

See every 31-inch and 32-inch size in metric.

Same change, other sizes

The same change in diameter, width and sidewall has its own page: 265/70R17 vs 265/75R17.

Other comparisons with these sizes

• 265/60R18 vs 275/65R18

Compare other sizes in the calculator