Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-20 | 235/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.5) | 30.18 (766.5) | 1.5 (38) 5.2% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 90.1 (2288.65) | 94.8 (2408.03) | 4.7 (119.38) 5.2% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.09 (129.25) | 0.75 (19) 17.2% |
| Revolutions per mile (km) | 703.18 (436.94) | 668.32 (415.28) | -34.86 (-21.66) -5% |
235/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.04 mph (33.87 km/h) |
| 25 mph (40.23 km/h) | 26.3 mph (42.33 km/h) |
| 30 mph (48.28 km/h) | 31.56 mph (50.8 km/h) |
| 35 mph (56.33 km/h) | 36.83 mph (59.27 km/h) |
| 40 mph (64.37 km/h) | 42.09 mph (67.73 km/h) |
| 45 mph (72.42 km/h) | 47.35 mph (76.2 km/h) |
| 50 mph (80.47 km/h) | 52.61 mph (84.66 km/h) |
| 55 mph (88.51 km/h) | 57.87 mph (93.13 km/h) |
| 60 mph (96.56 km/h) | 63.13 mph (101.6 km/h) |
| 65 mph (104.61 km/h) | 68.39 mph (110.06 km/h) |
| 70 mph (112.65 km/h) | 73.65 mph (118.53 km/h) |
| 75 mph (120.7 km/h) | 78.91 mph (127 km/h) |
| 80 mph (128.75 km/h) | 84.17 mph (135.46 km/h) |
| 85 mph (136.79 km/h) | 89.43 mph (143.93 km/h) |
| 90 mph (144.84 km/h) | 94.69 mph (152.4 km/h) |
| 95 mph (152.89 km/h) | 99.96 mph (160.86 km/h) |
| 100 mph (160.93 km/h) | 105.22 mph (169.33 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1701 | 1976 | 2128 | 2222 | 2323 | 2396 | 2475 | 2569 | 2699 | 2830 | 2975 | 3090 | 3300 | 3532 | 3713 | 3829 | 3894 | 4132 | 4465 | 5189 |
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