TireSizesFinder

225/70R14 vs 195/70R15

195/70R15 is 0.65 in (16.6 mm) shorter than 225/70R14, a −2.48% diameter difference. With the speedometer set for 225/70R14, an indicated 60 mph is 58.5 mph on 195/70R15.

Is this a safe swap?

Diameter difference −2.48%: within the ±3% guideline

By overall diameter alone, 195/70R15 falls inside the ±3% range commonly used as a guideline when replacing 225/70R14. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 225/70R14 (26.40 in) vs 195/70R15 (25.75 in)225/70R1426.40 in × 8.86 in195/70R1525.75 in × 7.68 in
Side profile and tread width, drawn to the same scale.
225/70R14 vs 195/70R15 differences
Measurement225/70R14195/70R15Difference% diff
Overall diameter26.40 in (670.6 mm)25.75 in (654.0 mm)−0.65 in (−16.6 mm)−2.48%
Sidewall height6.20 in (157.5 mm)5.37 in (136.5 mm)−0.83 in (−21.0 mm)−13.33%
Section width8.86 in (225.0 mm)7.68 in (195.0 mm)−1.18 in (−30.0 mm)−13.33%
Circumference82.94 in (2,106.8 mm)80.89 in (2,054.6 mm)−2.05 in (−52.2 mm)−2.48%
Revolutions per mile764783+19+2.54%
True speed with the speedometer calibrated for 225/70R14
IndicatedActual on 225/70R14Actual on 195/70R15Difference
30 mph30.0 mph29.3 mph−0.7 mph
60 mph60.0 mph58.5 mph−1.5 mph
75 mph75.0 mph73.1 mph−1.9 mph

Ride-height change: 195/70R15 lowers the vehicle by 0.33 in (8.3 mm) at the axle (half the −16.6 mm diameter difference).

195/70R15 is 0.65 in shorter than 225/70R14 and 30 mm narrower, a 2.48% difference in overall diameter.

With the speedometer calibrated for 225/70R14, an indicated 60 mph is actually 58.5 mph on 195/70R15, and revolutions per mile change from 764 to 783.

195/70R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 225/70R14.

Size pages

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