TireSizesFinder

225/70R15 vs 225/65R16

225/65R16 is 0.11 in (2.9 mm) taller than 225/70R15, a +0.42% diameter difference. With the speedometer set for 225/70R15, an indicated 60 mph is 60.3 mph on 225/65R16.

Is this a safe swap?

Diameter difference +0.42%: under 1%

By overall diameter alone, 225/65R16 is a near match for 225/70R15; 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: 225/70R15 (27.40 in) vs 225/65R16 (27.52 in)225/70R1527.40 in × 8.86 in225/65R1627.52 in × 8.86 in
Side profile and tread width, drawn to the same scale.
225/70R15 vs 225/65R16 differences
Measurement225/70R15225/65R16Difference% diff
Overall diameter27.40 in (696.0 mm)27.52 in (698.9 mm)+0.11 in (+2.9 mm)+0.42%
Sidewall height6.20 in (157.5 mm)5.76 in (146.3 mm)−0.44 in (−11.2 mm)−7.14%
Section width8.86 in (225.0 mm)8.86 in (225.0 mm)0.00 in (0.0 mm)0.00%
Circumference86.08 in (2,186.5 mm)86.44 in (2,195.7 mm)+0.36 in (+9.1 mm)+0.42%
Revolutions per mile736733−3−0.41%
True speed with the speedometer calibrated for 225/70R15
IndicatedActual on 225/70R15Actual on 225/65R16Difference
30 mph30.0 mph30.1 mph+0.1 mph
60 mph60.0 mph60.3 mph+0.3 mph
75 mph75.0 mph75.3 mph+0.3 mph

Ride-height change: 225/65R16 raises the vehicle by 0.06 in (1.4 mm) at the axle (half the +2.9 mm diameter difference).

225/65R16 is 0.11 in taller than 225/70R15 and the same width, a 0.42% difference in overall diameter.

With the speedometer calibrated for 225/70R15, an indicated 60 mph is actually 60.3 mph on 225/65R16, and revolutions per mile change from 736 to 733.

225/65R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 225/70R15.

Size pages

Other comparisons with 225/70R15

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