31x10.50R16 vs 265/75R16

265/75R16 is 0.65 in (16.5 mm) taller than 31x10.50R16, a +2.10% diameter difference. With the speedometer set for 31x10.50R16, an indicated 60 mph is 61.3 mph on 265/75R16.

Is this a safe swap?

Diameter difference +2.10%: within the ±3% guideline

By overall diameter alone, 265/75R16 falls inside the ±3% range commonly used as a guideline when replacing 31x10.50R16. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

Side profile and tread width, drawn to the same scale.

31x10.50R16 vs 265/75R16 differences
Measurement	31x10.50R16	265/75R16	Difference	% diff
Overall diameter	31.00 in (787.4 mm)	31.65 in (803.9 mm)	+0.65 in (+16.5 mm)	+2.10%
Sidewall height	7.50 in (190.5 mm)	7.82 in (198.8 mm)	+0.32 in (+8.3 mm)	+4.33%
Section width	10.50 in (266.7 mm)	10.43 in (265.0 mm)	−0.07 in (−1.7 mm)	−0.64%
Circumference	97.39 in (2,473.7 mm)	99.43 in (2,525.5 mm)	+2.04 in (+51.8 mm)	+2.10%
Revolutions per mile	651	637	−13	−2.05%

True speed with the speedometer calibrated for 31x10.50R16
Indicated	Actual on 31x10.50R16	Actual on 265/75R16	Difference
30 mph	30.0 mph	30.6 mph	+0.6 mph
60 mph	60.0 mph	61.3 mph	+1.3 mph
75 mph	75.0 mph	76.6 mph	+1.6 mph

Ride-height change: 265/75R16 raises the vehicle by 0.32 in (8.3 mm) at the axle (half the +16.5 mm diameter difference).

265/75R16 is 0.65 in taller than 31x10.50R16 and 2 mm narrower, a 2.10% difference in overall diameter.

With the speedometer calibrated for 31x10.50R16, an indicated 60 mph is actually 61.3 mph on 265/75R16, and revolutions per mile change from 651 to 637.

Both sizes mount on 16-inch wheels.

Size pages

Other comparisons with 31x10.50R16

Other comparisons with 265/75R16

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.