Home225/65R17 vs 235/65R17

225/65R17 vs 235/65R17

The 235/65R17 is 29.03 in tall: 0.51 in (1.8%) taller than the 225/65R17 at 28.52 in. At an indicated 60 mph you'd be doing 61.1 mph.The 235/65R17 is 737.3 mm tall: 13.0 mm (1.8%) taller than the 225/65R17 at 724.3 mm. At an indicated 100 km/h you'd be doing 101.8 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

Only the section width changes, from 8.86 in to 9.25 in. The aspect ratio is a percentage of the width, so each sidewall grows with it, by 0.25 in, and the 235/65R17 ends up 0.51 in taller overall.

Makers' own measured diameters run 28.5 in for the 225/65R17 and 29.06 to 29.1 in for the 235/65R17, against the calculated 28.52 in and 29.03 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 225/65R17 reads low on the 235/65R17: an indicated 60 mph is a true 61.1 mph.A speedometer that read true on the 225/65R17 reads low on the 235/65R17: an indicated 100 km/h is a true 101.8 km/h.

The odometer records about 9,820 miles for every 10,000 you drive.The odometer records about 9,820 km for every 10,000 you drive.

Ground clearance and size class

Ground clearance at the axle rises by 0.26 in: half the diameter change, unloaded.Ground clearance at the axle rises by 6.5 mm: half the diameter change, unloaded. By calculated diameter both are 29-inch tires.

Same change, other sizes

The same change in diameter, width and sidewall has its own page: 275/65R18 vs 285/65R18.

Compare other sizes in the calculator