285/60R20 vs 295/60R20

295/60R20 is 0.47 in (12.0 mm) taller than 285/60R20, a +1.41% diameter difference. With the speedometer set for 285/60R20, an indicated 60 mph is 60.8 mph on 295/60R20.

Is this a safe swap?

Diameter difference +1.41%: within the ±3% guideline

By overall diameter alone, 295/60R20 falls inside the ±3% range commonly used as a guideline when replacing 285/60R20. 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.

285/60R20 vs 295/60R20 differences
Measurement	285/60R20	295/60R20	Difference	% diff
Overall diameter	33.46 in (850.0 mm)	33.94 in (862.0 mm)	+0.47 in (+12.0 mm)	+1.41%
Sidewall height	6.73 in (171.0 mm)	6.97 in (177.0 mm)	+0.24 in (+6.0 mm)	+3.51%
Section width	11.22 in (285.0 mm)	11.61 in (295.0 mm)	+0.39 in (+10.0 mm)	+3.51%
Circumference	105.13 in (2,670.4 mm)	106.62 in (2,708.1 mm)	+1.48 in (+37.7 mm)	+1.41%
Revolutions per mile	603	594	−8	−1.39%

True speed with the speedometer calibrated for 285/60R20
Indicated	Actual on 285/60R20	Actual on 295/60R20	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.8 mph	+0.8 mph
75 mph	75.0 mph	76.1 mph	+1.1 mph

Ride-height change: 295/60R20 raises the vehicle by 0.24 in (6.0 mm) at the axle (half the +12.0 mm diameter difference).

295/60R20 is 0.47 in taller than 285/60R20 and 10 mm wider, a 1.41% difference in overall diameter.

With the speedometer calibrated for 285/60R20, an indicated 60 mph is actually 60.8 mph on 295/60R20, and revolutions per mile change from 603 to 594.

Both sizes mount on 20-inch wheels.

Size pages

Other comparisons with 285/60R20

Other comparisons with 295/60R20

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