Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-20 | 235/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 30.18 (766.5) | 3.33 (84.5) 12.4% |
| Width inches (mm) | 5.71 (145) | 9.25 (235) | 3.54 (90) 62.1% |
| Circum. inches (mm) | 84.35 (2142.57) | 94.8 (2408.03) | 10.45 (265.46) 12.4% |
| Sidewall Height inches (mm) | 3.43 (87) | 5.09 (129.25) | 1.66 (42.25) 48.6% |
| Revolutions per mile (km) | 751.13 (466.73) | 668.32 (415.28) | -82.81 (-51.45) -11% |
235/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.48 mph (36.17 km/h) |
| 25 mph (40.23 km/h) | 28.1 mph (45.22 km/h) |
| 30 mph (48.28 km/h) | 33.72 mph (54.26 km/h) |
| 35 mph (56.33 km/h) | 39.34 mph (63.31 km/h) |
| 40 mph (64.37 km/h) | 44.96 mph (72.35 km/h) |
| 45 mph (72.42 km/h) | 50.58 mph (81.39 km/h) |
| 50 mph (80.47 km/h) | 56.2 mph (90.44 km/h) |
| 55 mph (88.51 km/h) | 61.81 mph (99.48 km/h) |
| 60 mph (96.56 km/h) | 67.43 mph (108.52 km/h) |
| 65 mph (104.61 km/h) | 73.05 mph (117.57 km/h) |
| 70 mph (112.65 km/h) | 78.67 mph (126.61 km/h) |
| 75 mph (120.7 km/h) | 84.29 mph (135.66 km/h) |
| 80 mph (128.75 km/h) | 89.91 mph (144.7 km/h) |
| 85 mph (136.79 km/h) | 95.53 mph (153.74 km/h) |
| 90 mph (144.84 km/h) | 101.15 mph (162.79 km/h) |
| 95 mph (152.89 km/h) | 106.77 mph (171.83 km/h) |
| 100 mph (160.93 km/h) | 112.39 mph (180.87 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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