Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-20 | 235/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.65 (753) | 30.18 (766.5) | 0.53 (13.5) 1.8% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 93.13 (2365.62) | 94.8 (2408.03) | 1.67 (42.41) 1.8% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 5.09 (129.25) | 0.27 (6.75) 5.5% |
| Revolutions per mile (km) | 680.31 (422.72) | 668.32 (415.28) | -11.98 (-7.45) -1.8% |
235/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.36 mph (32.76 km/h) |
| 25 mph (40.23 km/h) | 25.45 mph (40.95 km/h) |
| 30 mph (48.28 km/h) | 30.54 mph (49.15 km/h) |
| 35 mph (56.33 km/h) | 35.63 mph (57.34 km/h) |
| 40 mph (64.37 km/h) | 40.72 mph (65.53 km/h) |
| 45 mph (72.42 km/h) | 45.81 mph (73.72 km/h) |
| 50 mph (80.47 km/h) | 50.9 mph (81.91 km/h) |
| 55 mph (88.51 km/h) | 55.99 mph (90.1 km/h) |
| 60 mph (96.56 km/h) | 61.08 mph (98.29 km/h) |
| 65 mph (104.61 km/h) | 66.17 mph (106.48 km/h) |
| 70 mph (112.65 km/h) | 71.25 mph (114.67 km/h) |
| 75 mph (120.7 km/h) | 76.34 mph (122.86 km/h) |
| 80 mph (128.75 km/h) | 81.43 mph (131.06 km/h) |
| 85 mph (136.79 km/h) | 86.52 mph (139.25 km/h) |
| 90 mph (144.84 km/h) | 91.61 mph (147.44 km/h) |
| 95 mph (152.89 km/h) | 96.7 mph (155.63 km/h) |
| 100 mph (160.93 km/h) | 101.79 mph (163.82 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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