TireSizesFinder

31x10.50R15 vs 265/70R16

265/70R16 is 0.39 in (10.0 mm) shorter than 31x10.50R15, a −1.27% diameter difference. With the speedometer set for 31x10.50R15, an indicated 60 mph is 59.2 mph on 265/70R16.

Is this a safe swap?

Diameter difference −1.27%: within the ±3% guideline

By overall diameter alone, 265/70R16 falls inside the ±3% range commonly used as a guideline when replacing 31x10.50R15. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 31x10.50R15 (31.00 in) vs 265/70R16 (30.61 in)31x10.50R1531.00 in × 10.50 in265/70R1630.61 in × 10.43 in
Side profile and tread width, drawn to the same scale.
31x10.50R15 vs 265/70R16 differences
Measurement31x10.50R15265/70R16Difference% diff
Overall diameter31.00 in (787.4 mm)30.61 in (777.4 mm)−0.39 in (−10.0 mm)−1.27%
Sidewall height8.00 in (203.2 mm)7.30 in (185.5 mm)−0.70 in (−17.7 mm)−8.71%
Section width10.50 in (266.7 mm)10.43 in (265.0 mm)−0.07 in (−1.7 mm)−0.64%
Circumference97.39 in (2,473.7 mm)96.15 in (2,442.3 mm)−1.24 in (−31.4 mm)−1.27%
Revolutions per mile651659+8+1.29%
True speed with the speedometer calibrated for 31x10.50R15
IndicatedActual on 31x10.50R15Actual on 265/70R16Difference
30 mph30.0 mph29.6 mph−0.4 mph
60 mph60.0 mph59.2 mph−0.8 mph
75 mph75.0 mph74.0 mph−1.0 mph

Ride-height change: 265/70R16 lowers the vehicle by 0.20 in (5.0 mm) at the axle (half the −10.0 mm diameter difference).

265/70R16 is 0.39 in shorter than 31x10.50R15 and 2 mm narrower, a 1.27% difference in overall diameter.

With the speedometer calibrated for 31x10.50R15, an indicated 60 mph is actually 59.2 mph on 265/70R16, and revolutions per mile change from 651 to 659.

265/70R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 31x10.50R15.

Size pages

Other comparisons with 31x10.50R15

Other comparisons with 265/70R16

Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.