TireSizesFinder

205/50R15 vs 175/60R15

175/60R15 is 0.20 in (5.0 mm) taller than 205/50R15, a +0.85% diameter difference. With the speedometer set for 205/50R15, an indicated 60 mph is 60.5 mph on 175/60R15.

Is this a safe swap?

Diameter difference +0.85%: under 1%

By overall diameter alone, 175/60R15 is a near match for 205/50R15; 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: 205/50R15 (23.07 in) vs 175/60R15 (23.27 in)205/50R1523.07 in × 8.07 in175/60R1523.27 in × 6.89 in
Side profile and tread width, drawn to the same scale.
205/50R15 vs 175/60R15 differences
Measurement205/50R15175/60R15Difference% diff
Overall diameter23.07 in (586.0 mm)23.27 in (591.0 mm)+0.20 in (+5.0 mm)+0.85%
Sidewall height4.04 in (102.5 mm)4.13 in (105.0 mm)+0.10 in (+2.5 mm)+2.44%
Section width8.07 in (205.0 mm)6.89 in (175.0 mm)−1.18 in (−30.0 mm)−14.63%
Circumference72.48 in (1,841.0 mm)73.10 in (1,856.7 mm)+0.62 in (+15.7 mm)+0.85%
Revolutions per mile874867−7−0.85%
True speed with the speedometer calibrated for 205/50R15
IndicatedActual on 205/50R15Actual on 175/60R15Difference
30 mph30.0 mph30.3 mph+0.3 mph
60 mph60.0 mph60.5 mph+0.5 mph
75 mph75.0 mph75.6 mph+0.6 mph

Ride-height change: 175/60R15 raises the vehicle by 0.10 in (2.5 mm) at the axle (half the +5.0 mm diameter difference).

175/60R15 is 0.20 in taller than 205/50R15 and 30 mm narrower, a 0.85% difference in overall diameter.

With the speedometer calibrated for 205/50R15, an indicated 60 mph is actually 60.5 mph on 175/60R15, and revolutions per mile change from 874 to 867.

Both sizes mount on 15-inch wheels.

Size pages

Other comparisons with 205/50R15

Other comparisons with 175/60R15

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