TireSizesFinder

265/75R16 vs 255/75R17

255/75R17 is 0.41 in (10.4 mm) taller than 265/75R16, a +1.29% diameter difference. With the speedometer set for 265/75R16, an indicated 60 mph is 60.8 mph on 255/75R17.

Is this a safe swap?

Diameter difference +1.29%: within the ±3% guideline

By overall diameter alone, 255/75R17 falls inside the ±3% range commonly used as a guideline when replacing 265/75R16. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 265/75R16 (31.65 in) vs 255/75R17 (32.06 in)265/75R1631.65 in × 10.43 in255/75R1732.06 in × 10.04 in
Side profile and tread width, drawn to the same scale.
265/75R16 vs 255/75R17 differences
Measurement265/75R16255/75R17Difference% diff
Overall diameter31.65 in (803.9 mm)32.06 in (814.3 mm)+0.41 in (+10.4 mm)+1.29%
Sidewall height7.82 in (198.8 mm)7.53 in (191.3 mm)−0.30 in (−7.5 mm)−3.77%
Section width10.43 in (265.0 mm)10.04 in (255.0 mm)−0.39 in (−10.0 mm)−3.77%
Circumference99.43 in (2,525.5 mm)100.72 in (2,558.2 mm)+1.29 in (+32.7 mm)+1.29%
Revolutions per mile637629−8−1.28%
True speed with the speedometer calibrated for 265/75R16
IndicatedActual on 265/75R16Actual on 255/75R17Difference
30 mph30.0 mph30.4 mph+0.4 mph
60 mph60.0 mph60.8 mph+0.8 mph
75 mph75.0 mph76.0 mph+1.0 mph

Ride-height change: 255/75R17 raises the vehicle by 0.20 in (5.2 mm) at the axle (half the +10.4 mm diameter difference).

255/75R17 is 0.41 in taller than 265/75R16 and 10 mm narrower, a 1.29% difference in overall diameter.

With the speedometer calibrated for 265/75R16, an indicated 60 mph is actually 60.8 mph on 255/75R17, and revolutions per mile change from 637 to 629.

255/75R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 265/75R16.

Size pages

Other comparisons with 265/75R16

Other comparisons with 255/75R17

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