195/75R14 vs 235/60R15

235/60R15 is 0.59 in (14.9 mm) taller than 195/75R14, a +2.30% diameter difference. With the speedometer set for 195/75R14, an indicated 60 mph is 61.4 mph on 235/60R15.

Is this a safe swap?

Diameter difference +2.30%: within the ±3% guideline

By overall diameter alone, 235/60R15 falls inside the ±3% range commonly used as a guideline when replacing 195/75R14. 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.

195/75R14 vs 235/60R15 differences
Measurement	195/75R14	235/60R15	Difference	% diff
Overall diameter	25.52 in (648.1 mm)	26.10 in (663.0 mm)	+0.59 in (+14.9 mm)	+2.30%
Sidewall height	5.76 in (146.3 mm)	5.55 in (141.0 mm)	−0.21 in (−5.2 mm)	−3.59%
Section width	7.68 in (195.0 mm)	9.25 in (235.0 mm)	+1.57 in (+40.0 mm)	+20.51%
Circumference	80.16 in (2,036.1 mm)	82.00 in (2,082.9 mm)	+1.84 in (+46.8 mm)	+2.30%
Revolutions per mile	790	773	−18	−2.25%

True speed with the speedometer calibrated for 195/75R14
Indicated	Actual on 195/75R14	Actual on 235/60R15	Difference
30 mph	30.0 mph	30.7 mph	+0.7 mph
60 mph	60.0 mph	61.4 mph	+1.4 mph
75 mph	75.0 mph	76.7 mph	+1.7 mph

Ride-height change: 235/60R15 raises the vehicle by 0.29 in (7.5 mm) at the axle (half the +14.9 mm diameter difference).

235/60R15 is 0.59 in taller than 195/75R14 and 40 mm wider, a 2.30% difference in overall diameter.

With the speedometer calibrated for 195/75R14, an indicated 60 mph is actually 61.4 mph on 235/60R15, and revolutions per mile change from 790 to 773.

235/60R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 195/75R14.

Size pages

Other comparisons with 195/75R14

Other comparisons with 235/60R15

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