TireSizesFinder

285/45R20 vs 295/45R20

295/45R20 is 0.35 in (9.0 mm) taller than 285/45R20, a +1.18% diameter difference. With the speedometer set for 285/45R20, an indicated 60 mph is 60.7 mph on 295/45R20.

Is this a safe swap?

Diameter difference +1.18%: within the ±3% guideline

By overall diameter alone, 295/45R20 falls inside the ±3% range commonly used as a guideline when replacing 285/45R20. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 285/45R20 (30.10 in) vs 295/45R20 (30.45 in)285/45R2030.10 in × 11.22 in295/45R2030.45 in × 11.61 in
Side profile and tread width, drawn to the same scale.
285/45R20 vs 295/45R20 differences
Measurement285/45R20295/45R20Difference% diff
Overall diameter30.10 in (764.5 mm)30.45 in (773.5 mm)+0.35 in (+9.0 mm)+1.18%
Sidewall height5.05 in (128.3 mm)5.23 in (132.8 mm)+0.18 in (+4.5 mm)+3.51%
Section width11.22 in (285.0 mm)11.61 in (295.0 mm)+0.39 in (+10.0 mm)+3.51%
Circumference94.56 in (2,401.7 mm)95.67 in (2,430.0 mm)+1.11 in (+28.3 mm)+1.18%
Revolutions per mile670662−8−1.16%
True speed with the speedometer calibrated for 285/45R20
IndicatedActual on 285/45R20Actual on 295/45R20Difference
30 mph30.0 mph30.4 mph+0.4 mph
60 mph60.0 mph60.7 mph+0.7 mph
75 mph75.0 mph75.9 mph+0.9 mph

Ride-height change: 295/45R20 raises the vehicle by 0.18 in (4.5 mm) at the axle (half the +9.0 mm diameter difference).

295/45R20 is 0.35 in taller than 285/45R20 and 10 mm wider, a 1.18% difference in overall diameter.

With the speedometer calibrated for 285/45R20, an indicated 60 mph is actually 60.7 mph on 295/45R20, and revolutions per mile change from 670 to 662.

Both sizes mount on 20-inch wheels.

Size pages

Other comparisons with 285/45R20

Other comparisons with 295/45R20

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