TireSizesFinder

175/60R15 vs 175/65R15

175/65R15 is 0.69 in (17.5 mm) taller than 175/60R15, a +2.96% diameter difference. With the speedometer set for 175/60R15, an indicated 60 mph is 61.8 mph on 175/65R15.

Is this a safe swap?

Diameter difference +2.96%: within the ±3% guideline

By overall diameter alone, 175/65R15 falls inside the ±3% range commonly used as a guideline when replacing 175/60R15. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 175/60R15 (23.27 in) vs 175/65R15 (23.96 in)175/60R1523.27 in × 6.89 in175/65R1523.96 in × 6.89 in
Side profile and tread width, drawn to the same scale.
175/60R15 vs 175/65R15 differences
Measurement175/60R15175/65R15Difference% diff
Overall diameter23.27 in (591.0 mm)23.96 in (608.5 mm)+0.69 in (+17.5 mm)+2.96%
Sidewall height4.13 in (105.0 mm)4.48 in (113.8 mm)+0.34 in (+8.8 mm)+8.33%
Section width6.89 in (175.0 mm)6.89 in (175.0 mm)0.00 in (0.0 mm)0.00%
Circumference73.10 in (1,856.7 mm)75.26 in (1,911.7 mm)+2.16 in (+55.0 mm)+2.96%
Revolutions per mile867842−25−2.88%
True speed with the speedometer calibrated for 175/60R15
IndicatedActual on 175/60R15Actual on 175/65R15Difference
30 mph30.0 mph30.9 mph+0.9 mph
60 mph60.0 mph61.8 mph+1.8 mph
75 mph75.0 mph77.2 mph+2.2 mph

Ride-height change: 175/65R15 raises the vehicle by 0.34 in (8.8 mm) at the axle (half the +17.5 mm diameter difference).

175/65R15 is 0.69 in taller than 175/60R15 and the same width, a 2.96% difference in overall diameter.

With the speedometer calibrated for 175/60R15, an indicated 60 mph is actually 61.8 mph on 175/65R15, and revolutions per mile change from 867 to 842.

Both sizes mount on 15-inch wheels.

Size pages

Other comparisons with 175/60R15

Other comparisons with 175/65R15

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