TireSizesFinder

275/45R20 vs 295/45R20

295/45R20 is 0.71 in (18.0 mm) taller than 275/45R20, a +2.38% diameter difference. With the speedometer set for 275/45R20, an indicated 60 mph is 61.4 mph on 295/45R20.

Is this a safe swap?

Diameter difference +2.38%: within the ±3% guideline

By overall diameter alone, 295/45R20 falls inside the ±3% range commonly used as a guideline when replacing 275/45R20. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 275/45R20 (29.74 in) vs 295/45R20 (30.45 in)275/45R2029.74 in × 10.83 in295/45R2030.45 in × 11.61 in
Side profile and tread width, drawn to the same scale.
275/45R20 vs 295/45R20 differences
Measurement275/45R20295/45R20Difference% diff
Overall diameter29.74 in (755.5 mm)30.45 in (773.5 mm)+0.71 in (+18.0 mm)+2.38%
Sidewall height4.87 in (123.8 mm)5.23 in (132.8 mm)+0.35 in (+9.0 mm)+7.27%
Section width10.83 in (275.0 mm)11.61 in (295.0 mm)+0.79 in (+20.0 mm)+7.27%
Circumference93.44 in (2,373.5 mm)95.67 in (2,430.0 mm)+2.23 in (+56.5 mm)+2.38%
Revolutions per mile678662−16−2.33%
True speed with the speedometer calibrated for 275/45R20
IndicatedActual on 275/45R20Actual on 295/45R20Difference
30 mph30.0 mph30.7 mph+0.7 mph
60 mph60.0 mph61.4 mph+1.4 mph
75 mph75.0 mph76.8 mph+1.8 mph

Ride-height change: 295/45R20 raises the vehicle by 0.35 in (9.0 mm) at the axle (half the +18.0 mm diameter difference).

295/45R20 is 0.71 in taller than 275/45R20 and 20 mm wider, a 2.38% difference in overall diameter.

With the speedometer calibrated for 275/45R20, an indicated 60 mph is actually 61.4 mph on 295/45R20, and revolutions per mile change from 678 to 662.

Both sizes mount on 20-inch wheels.

Size pages

Other comparisons with 275/45R20

Other comparisons with 295/45R20

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