315/35R20 vs 295/30R22
295/30R22 is 0.29 in (7.3 mm) taller than 315/35R20, a +1.00% diameter difference. With the speedometer set for 315/35R20, an indicated 60 mph is 60.6 mph on 295/30R22.
Is this a safe swap?
Diameter difference +1.00%: within the ±3% guideline
By overall diameter alone, 295/30R22 falls inside the ±3% range commonly used as a guideline when replacing 315/35R20. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.
| Measurement | 315/35R20 | 295/30R22 | Difference | % diff |
|---|---|---|---|---|
| Overall diameter | 28.68 in (728.5 mm) | 28.97 in (735.8 mm) | +0.29 in (+7.3 mm) | +1.00% |
| Sidewall height | 4.34 in (110.3 mm) | 3.48 in (88.5 mm) | −0.86 in (−21.7 mm) | −19.73% |
| Section width | 12.40 in (315.0 mm) | 11.61 in (295.0 mm) | −0.79 in (−20.0 mm) | −6.35% |
| Circumference | 90.10 in (2,288.7 mm) | 91.01 in (2,311.6 mm) | +0.90 in (+22.9 mm) | +1.00% |
| Revolutions per mile | 703 | 696 | −7 | −0.99% |
| Indicated | Actual on 315/35R20 | Actual on 295/30R22 | Difference |
|---|---|---|---|
| 30 mph | 30.0 mph | 30.3 mph | +0.3 mph |
| 60 mph | 60.0 mph | 60.6 mph | +0.6 mph |
| 75 mph | 75.0 mph | 75.8 mph | +0.8 mph |
Ride-height change: 295/30R22 raises the vehicle by 0.14 in (3.6 mm) at the axle (half the +7.3 mm diameter difference).
295/30R22 is 0.29 in taller than 315/35R20 and 20 mm narrower, a 1.00% difference in overall diameter.
With the speedometer calibrated for 315/35R20, an indicated 60 mph is actually 60.6 mph on 295/30R22, and revolutions per mile change from 703 to 696.
295/30R22 mounts on a 22-inch wheel, a plus-2 fitment from the 20-inch wheel of 315/35R20.
Size pages
Other comparisons with 315/35R20
- 245/55R18 vs 315/35R20
- 225/60R18 vs 315/35R20
- 245/50R19 vs 315/35R20
- 225/55R19 vs 315/35R20
- 275/45R19 vs 315/35R20
- 295/35R20 vs 315/35R20
- 275/40R20 vs 315/35R20
- 245/45R20 vs 315/35R20
Other comparisons with 295/30R22
- 275/40R20 vs 295/30R22
- 245/45R20 vs 295/30R22
- 285/40R20 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.