245/75R16 vs 265/65R17

265/65R17 is 0.09 in (2.4 mm) taller than 245/75R16, a +0.31% diameter difference. With the speedometer set for 245/75R16, an indicated 60 mph is 60.2 mph on 265/65R17.

Is this a safe swap?

Diameter difference +0.31%: under 1%

By overall diameter alone, 265/65R17 is a near match for 245/75R16; the speedometer changes by less than 1%. 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.

245/75R16 vs 265/65R17 differences
Measurement	245/75R16	265/65R17	Difference	% diff
Overall diameter	30.47 in (773.9 mm)	30.56 in (776.3 mm)	+0.09 in (+2.4 mm)	+0.31%
Sidewall height	7.23 in (183.8 mm)	6.78 in (172.3 mm)	−0.45 in (−11.5 mm)	−6.26%
Section width	9.65 in (245.0 mm)	10.43 in (265.0 mm)	+0.79 in (+20.0 mm)	+8.16%
Circumference	95.72 in (2,431.3 mm)	96.02 in (2,438.8 mm)	+0.30 in (+7.5 mm)	+0.31%
Revolutions per mile	662	660	−2	−0.31%

True speed with the speedometer calibrated for 245/75R16
Indicated	Actual on 245/75R16	Actual on 265/65R17	Difference
30 mph	30.0 mph	30.1 mph	+0.1 mph
60 mph	60.0 mph	60.2 mph	+0.2 mph
75 mph	75.0 mph	75.2 mph	+0.2 mph

Ride-height change: 265/65R17 raises the vehicle by 0.05 in (1.2 mm) at the axle (half the +2.4 mm diameter difference).

265/65R17 is 0.09 in taller than 245/75R16 and 20 mm wider, a 0.31% difference in overall diameter.

With the speedometer calibrated for 245/75R16, an indicated 60 mph is actually 60.2 mph on 265/65R17, and revolutions per mile change from 662 to 660.

265/65R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 245/75R16.

Size pages

Other comparisons with 245/75R16

Other comparisons with 265/65R17

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