295/40R20 dimensions
| Measure | Inches | Millimetres |
|---|---|---|
| Overall height | 29.29 in | 744 mm |
| Section width | 11.61 in | 295 mm |
| Sidewall height | 4.65 in | 118.0 mm |
| Wheel diameter | 20 in | 508 mm |
| Circumference | 92.0 in | 2,337 mm |
| Revolutions per mile | 688.5 |
The math
| Step | Math | Result |
|---|---|---|
| Sidewall | 295 × 40% = 118.0 mm ÷ 25.4 | 4.65 in |
| Overall height | 20 + 2 × 4.65 | 29.29 in |
| Width | 295 mm ÷ 25.4 | 11.61 in |
| Circumference | π × 29.29 | 92.0 in |
| Revs per mile | 63,360 ÷ 92.0 | 688.5 |
With a 4.6 in sidewall this is a medium sidewall: a balance of cushion and response. Real tires vary by brand and model, and the loaded radius under the vehicle is a bit smaller than this unloaded figure.
One step either way on a 20 in wheel
Each row changes one thing and shows the height change against 295/40R20, plus what 60 mph on the speedometer would really be if you swapped to that size.
| Change | Size | Height | Height change | 60 mph shows as | Verdict |
|---|---|---|---|---|---|
| Wider | 305/40R20 (compare) | 29.6 in | +1.1% | 60.6 mph | Close match |
| Narrower | 285/40R20 (compare) | 29.0 in | -1.1% | 59.4 mph | Close match |
| Taller sidewall | 295/45R20 (compare) | 30.5 in | +4.0% | 62.4 mph | Check clearance |
| Shorter sidewall | 295/35R20 (compare) | 28.1 in | -4.0% | 57.6 mph | Check clearance |
| Wider, shorter sidewall | 305/35R20 (compare) | 28.4 in | -3.0% | 58.2 mph | Check clearance |
| Narrower, taller sidewall | 285/45R20 (compare) | 30.1 in | +2.8% | 61.7 mph | Close match |
Calculated sizes within ±3% on other wheels
Plus and minus sizes that keep the overall height within about 3% (a rule of thumb from Discount Tire and 1010tires), widths within 30 mm. Calculated, not a list of tires on sale: check that a tire exists in that size.
19 in wheels (one wheel size smaller)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 325/40R19 (compare) | 29.2 in | -0.2% | +30 mm |
| 265/50R19 (compare) | 29.4 in | +0.5% | -30 mm |
| 295/45R19 (compare) | 29.5 in | +0.6% | +0 mm |
| 285/45R19 (compare) | 29.1 in | -0.7% | -10 mm |
21 in wheels (one wheel size larger)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 265/40R21 (compare) | 29.3 in | +0.2% | -30 mm |
| 305/35R21 (compare) | 29.4 in | +0.4% | +10 mm |
| 295/35R21 (compare) | 29.1 in | -0.6% | +0 mm |
| 275/40R21 (compare) | 29.7 in | +1.3% | -20 mm |
22 in wheels (two wheel sizes larger)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 265/35R22 (compare) | 29.3 in | +0.0% | -30 mm |
| 305/30R22 (compare) | 29.2 in | -0.3% | +10 mm |
| 315/30R22 (compare) | 29.4 in | +0.5% | +20 mm |
| 275/35R22 (compare) | 29.6 in | +1.0% | -20 mm |
Try it with your numbers
Compare 295/40R20 with another size · Convert to metric or find a 33 in size · Sizes that fit my wheel
Calculated from the size alone. Real tires vary a little by brand and model, and the loaded radius is a bit smaller. Confirm the wheel width range, clearance, load index and speed rating for your vehicle. See how to read a tire size, the load index chart and the speed rating chart.
Browse: all sizes in inches · 285/60R20 · 295/45R20.