Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/45-20 | 235/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.33 (719.5) | 30.18 (766.5) | 1.85 (47) 6.5% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 88.99 (2260.38) | 94.8 (2408.03) | 5.81 (147.65) 6.5% |
| Sidewall Height inches (mm) | 4.16 (105.75) | 5.09 (129.25) | 0.93 (23.5) 22.2% |
| Revolutions per mile (km) | 711.98 (442.4) | 668.32 (415.28) | -43.66 (-27.13) -6.1% |
235/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.31 mph (34.29 km/h) |
| 25 mph (40.23 km/h) | 26.63 mph (42.86 km/h) |
| 30 mph (48.28 km/h) | 31.96 mph (51.43 km/h) |
| 35 mph (56.33 km/h) | 37.29 mph (60.01 km/h) |
| 40 mph (64.37 km/h) | 42.61 mph (68.58 km/h) |
| 45 mph (72.42 km/h) | 47.94 mph (77.15 km/h) |
| 50 mph (80.47 km/h) | 53.27 mph (85.72 km/h) |
| 55 mph (88.51 km/h) | 58.59 mph (94.3 km/h) |
| 60 mph (96.56 km/h) | 63.92 mph (102.87 km/h) |
| 65 mph (104.61 km/h) | 69.25 mph (111.44 km/h) |
| 70 mph (112.65 km/h) | 74.57 mph (120.01 km/h) |
| 75 mph (120.7 km/h) | 79.9 mph (128.59 km/h) |
| 80 mph (128.75 km/h) | 85.23 mph (137.16 km/h) |
| 85 mph (136.79 km/h) | 90.55 mph (145.73 km/h) |
| 90 mph (144.84 km/h) | 95.88 mph (154.3 km/h) |
| 95 mph (152.89 km/h) | 101.21 mph (162.88 km/h) |
| 100 mph (160.93 km/h) | 106.53 mph (171.45 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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