215/70R14 vs 235/60R15

235/60R15 is 0.25 in (6.4 mm) taller than 215/70R14, a +0.97% diameter difference. With the speedometer set for 215/70R14, an indicated 60 mph is 60.6 mph on 235/60R15.

Is this a safe swap?

Diameter difference +0.97%: under 1%

By overall diameter alone, 235/60R15 is a near match for 215/70R14; 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.

215/70R14 vs 235/60R15 differences
Measurement	215/70R14	235/60R15	Difference	% diff
Overall diameter	25.85 in (656.6 mm)	26.10 in (663.0 mm)	+0.25 in (+6.4 mm)	+0.97%
Sidewall height	5.93 in (150.5 mm)	5.55 in (141.0 mm)	−0.37 in (−9.5 mm)	−6.31%
Section width	8.46 in (215.0 mm)	9.25 in (235.0 mm)	+0.79 in (+20.0 mm)	+9.30%
Circumference	81.21 in (2,062.8 mm)	82.00 in (2,082.9 mm)	+0.79 in (+20.1 mm)	+0.97%
Revolutions per mile	780	773	−8	−0.97%

True speed with the speedometer calibrated for 215/70R14
Indicated	Actual on 215/70R14	Actual on 235/60R15	Difference
30 mph	30.0 mph	30.3 mph	+0.3 mph
60 mph	60.0 mph	60.6 mph	+0.6 mph
75 mph	75.0 mph	75.7 mph	+0.7 mph

Ride-height change: 235/60R15 raises the vehicle by 0.13 in (3.2 mm) at the axle (half the +6.4 mm diameter difference).

235/60R15 is 0.25 in taller than 215/70R14 and 20 mm wider, a 0.97% difference in overall diameter.

With the speedometer calibrated for 215/70R14, an indicated 60 mph is actually 60.6 mph on 235/60R15, and revolutions per mile change from 780 to 773.

235/60R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 215/70R14.

Size pages

Other comparisons with 215/70R14

Other comparisons with 235/60R15

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