265/70R15 vs 275/60R17

275/60R17 is 0.39 in (9.8 mm) taller than 265/70R15, a +1.30% diameter difference. With the speedometer set for 265/70R15, an indicated 60 mph is 60.8 mph on 275/60R17.

Is this a safe swap?

Diameter difference +1.30%: within the ±3% guideline

By overall diameter alone, 275/60R17 falls inside the ±3% range commonly used as a guideline when replacing 265/70R15. 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.

265/70R15 vs 275/60R17 differences
Measurement	265/70R15	275/60R17	Difference	% diff
Overall diameter	29.61 in (752.0 mm)	29.99 in (761.8 mm)	+0.39 in (+9.8 mm)	+1.30%
Sidewall height	7.30 in (185.5 mm)	6.50 in (165.0 mm)	−0.81 in (−20.5 mm)	−11.05%
Section width	10.43 in (265.0 mm)	10.83 in (275.0 mm)	+0.39 in (+10.0 mm)	+3.77%
Circumference	93.01 in (2,362.5 mm)	94.22 in (2,393.3 mm)	+1.21 in (+30.8 mm)	+1.30%
Revolutions per mile	681	672	−9	−1.29%

True speed with the speedometer calibrated for 265/70R15
Indicated	Actual on 265/70R15	Actual on 275/60R17	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.8 mph	+0.8 mph
75 mph	75.0 mph	76.0 mph	+1.0 mph

Ride-height change: 275/60R17 raises the vehicle by 0.19 in (4.9 mm) at the axle (half the +9.8 mm diameter difference).

275/60R17 is 0.39 in taller than 265/70R15 and 10 mm wider, a 1.30% difference in overall diameter.

With the speedometer calibrated for 265/70R15, an indicated 60 mph is actually 60.8 mph on 275/60R17, and revolutions per mile change from 681 to 672.

275/60R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 265/70R15.

Size pages

Other comparisons with 265/70R15

Other comparisons with 275/60R17

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