Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-20 | 235/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.18 (766.5) | 33.88 (860.5) | 3.7 (94) 12.3% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 94.8 (2408.03) | 106.43 (2703.34) | 11.63 (295.31) 12.3% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 6.94 (176.25) | 1.85 (47) 36.4% |
| Revolutions per mile (km) | 668.32 (415.28) | 595.32 (369.91) | -73.01 (-45.36) -10.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.45 mph (36.13 km/h) |
| 25 mph (40.23 km/h) | 28.07 mph (45.17 km/h) |
| 30 mph (48.28 km/h) | 33.68 mph (54.2 km/h) |
| 35 mph (56.33 km/h) | 39.29 mph (63.23 km/h) |
| 40 mph (64.37 km/h) | 44.91 mph (72.27 km/h) |
| 45 mph (72.42 km/h) | 50.52 mph (81.3 km/h) |
| 50 mph (80.47 km/h) | 56.13 mph (90.34 km/h) |
| 55 mph (88.51 km/h) | 61.74 mph (99.37 km/h) |
| 60 mph (96.56 km/h) | 67.36 mph (108.4 km/h) |
| 65 mph (104.61 km/h) | 72.97 mph (117.44 km/h) |
| 70 mph (112.65 km/h) | 78.58 mph (126.47 km/h) |
| 75 mph (120.7 km/h) | 84.2 mph (135.5 km/h) |
| 80 mph (128.75 km/h) | 89.81 mph (144.54 km/h) |
| 85 mph (136.79 km/h) | 95.42 mph (153.57 km/h) |
| 90 mph (144.84 km/h) | 101.04 mph (162.6 km/h) |
| 95 mph (152.89 km/h) | 106.65 mph (171.64 km/h) |
| 100 mph (160.93 km/h) | 112.26 mph (180.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1515 | 1760 | 1895 | 1979 | 2069 | 2134 | 2205 | 2289 | 2405 | 2521 | 2650 | 2753 | 2940 | 3146 | 3307 | 3410 | 3468 | 3681 | 3978 | 4622 |
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