TireSizesFinder

265/70R16 vs 265/60R18

265/60R18 is 0.09 in (2.2 mm) shorter than 265/70R16, a −0.28% diameter difference. With the speedometer set for 265/70R16, an indicated 60 mph is 59.8 mph on 265/60R18.

Is this a safe swap?

Diameter difference −0.28%: under 1%

By overall diameter alone, 265/60R18 is a near match for 265/70R16; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 265/70R16 (30.61 in) vs 265/60R18 (30.52 in)265/70R1630.61 in × 10.43 in265/60R1830.52 in × 10.43 in
Side profile and tread width, drawn to the same scale.
265/70R16 vs 265/60R18 differences
Measurement265/70R16265/60R18Difference% diff
Overall diameter30.61 in (777.4 mm)30.52 in (775.2 mm)−0.09 in (−2.2 mm)−0.28%
Sidewall height7.30 in (185.5 mm)6.26 in (159.0 mm)−1.04 in (−26.5 mm)−14.29%
Section width10.43 in (265.0 mm)10.43 in (265.0 mm)0.00 in (0.0 mm)0.00%
Circumference96.15 in (2,442.3 mm)95.88 in (2,435.4 mm)−0.27 in (−6.9 mm)−0.28%
Revolutions per mile659661+2+0.28%
True speed with the speedometer calibrated for 265/70R16
IndicatedActual on 265/70R16Actual on 265/60R18Difference
30 mph30.0 mph29.9 mph−0.1 mph
60 mph60.0 mph59.8 mph−0.2 mph
75 mph75.0 mph74.8 mph−0.2 mph

Ride-height change: 265/60R18 lowers the vehicle by 0.04 in (1.1 mm) at the axle (half the −2.2 mm diameter difference).

265/60R18 is 0.09 in shorter than 265/70R16 and the same width, a 0.28% difference in overall diameter.

With the speedometer calibrated for 265/70R16, an indicated 60 mph is actually 59.8 mph on 265/60R18, and revolutions per mile change from 659 to 661.

265/60R18 mounts on a 18-inch wheel, a plus-2 fitment from the 16-inch wheel of 265/70R16.

Size pages

Other comparisons with 265/70R16

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