Home285/75R16 vs 305/70R16

285/75R16 vs 305/70R16

The 305/70R16 is 32.81 in tall: 0.02 in (0.1%) shorter than the 285/75R16 at 32.83 in. At an indicated 60 mph you'd be doing 60.0 mph.The 305/70R16 is 833.4 mm tall: 0.5 mm (0.1%) shorter than the 285/75R16 at 833.9 mm. At an indicated 100 km/h you'd be doing 99.9 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 (285/75 to 305/70). The 305/70R16 is 0.79 in wider, but each sidewall is 0.01 in shorter, so it ends up 0.02 in shorter overall.

Makers' own measured diameters run 32.8 to 33.07 in for the 285/75R16 and 32.79 to 33.02 in for the 305/70R16, against the calculated 32.83 in and 32.81 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 285/75R16 reads high on the 305/70R16: an indicated 60 mph is a true 60.0 mph.A speedometer that read true on the 285/75R16 reads high on the 305/70R16: an indicated 100 km/h is a true 99.9 km/h.

The odometer records about 10,010 miles for every 10,000 you drive.The odometer records about 10,010 km for every 10,000 you drive.

Ground clearance and size class

Ground clearance at the axle drops by 0.01 in: half the diameter change, unloaded.Ground clearance at the axle drops by 0.3 mm: half the diameter change, unloaded. By calculated diameter both are 33-inch tires.

See every 33-inch size in metric.

Other comparisons with these sizes

• 265/75R16 vs 285/75R16

285/75R16 in inches.

Compare other sizes in the calculator