285/40R20 vs 295/30R22
295/30R22 is 0.01 in (0.2 mm) shorter than 285/40R20, a −0.03% diameter difference. With the speedometer set for 285/40R20, an indicated 60 mph is 60.0 mph on 295/30R22.
Is this a safe swap?
Diameter difference −0.03%: under 1%
By overall diameter alone, 295/30R22 is a near match for 285/40R20; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.
| Measurement | 285/40R20 | 295/30R22 | Difference | % diff |
|---|---|---|---|---|
| Overall diameter | 28.98 in (736.0 mm) | 28.97 in (735.8 mm) | −0.01 in (−0.2 mm) | −0.03% |
| Sidewall height | 4.49 in (114.0 mm) | 3.48 in (88.5 mm) | −1.00 in (−25.5 mm) | −22.37% |
| Section width | 11.22 in (285.0 mm) | 11.61 in (295.0 mm) | +0.39 in (+10.0 mm) | +3.51% |
| Circumference | 91.03 in (2,312.2 mm) | 91.01 in (2,311.6 mm) | −0.02 in (−0.6 mm) | −0.03% |
| Revolutions per mile | 696 | 696 | 0 | +0.03% |
| Indicated | Actual on 285/40R20 | Actual on 295/30R22 | Difference |
|---|---|---|---|
| 30 mph | 30.0 mph | 30.0 mph | 0.0 mph |
| 60 mph | 60.0 mph | 60.0 mph | 0.0 mph |
| 75 mph | 75.0 mph | 75.0 mph | 0.0 mph |
Ride-height change: 295/30R22 lowers the vehicle by 0.00 in (0.1 mm) at the axle (half the −0.2 mm diameter difference).
295/30R22 is 0.01 in shorter than 285/40R20 and 10 mm wider, a 0.03% difference in overall diameter.
With the speedometer calibrated for 285/40R20, an indicated 60 mph is actually 60.0 mph on 295/30R22, and revolutions per mile change from 696 to 696.
295/30R22 mounts on a 22-inch wheel, a plus-2 fitment from the 20-inch wheel of 285/40R20.
Size pages
Other comparisons with 285/40R20
- 255/55R18 vs 285/40R20
- 235/60R18 vs 285/40R20
- 225/55R19 vs 285/40R20
- 275/45R19 vs 285/40R20
- 255/50R19 vs 285/40R20
- 285/45R19 vs 285/40R20
- 235/55R19 vs 285/40R20
- 285/35R20 vs 285/40R20
Other comparisons with 295/30R22
- 275/40R20 vs 295/30R22
- 245/45R20 vs 295/30R22
- 315/35R20 vs 295/30R22
- 255/45R20 vs 295/30R22
- 295/40R20 vs 295/30R22
- 325/30R21 vs 295/30R22
- 245/40R21 vs 295/30R22
- 285/35R21 vs 295/30R22
Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.