Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/65-18 | 235/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.56 (801.7) | 30.18 (766.5) | -1.39 (-35.2) -4.4% |
| Width inches (mm) | 10.43 (265) | 9.25 (235) | -1.18 (-30) -11.3% |
| Circum. inches (mm) | 99.16 (2518.61) | 94.8 (2408.03) | -4.35 (-110.58) -4.4% |
| Sidewall Height inches (mm) | 6.78 (172.25) | 5.09 (129.25) | -1.69 (-43) -25% |
| Revolutions per mile (km) | 638.98 (397.04) | 668.32 (415.28) | 29.34 (18.23) 4.6% |
235/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.12 mph (30.77 km/h) |
| 25 mph (40.23 km/h) | 23.9 mph (38.47 km/h) |
| 30 mph (48.28 km/h) | 28.68 mph (46.16 km/h) |
| 35 mph (56.33 km/h) | 33.46 mph (53.85 km/h) |
| 40 mph (64.37 km/h) | 38.24 mph (61.55 km/h) |
| 45 mph (72.42 km/h) | 43.02 mph (69.24 km/h) |
| 50 mph (80.47 km/h) | 47.8 mph (76.93 km/h) |
| 55 mph (88.51 km/h) | 52.59 mph (84.63 km/h) |
| 60 mph (96.56 km/h) | 57.37 mph (92.32 km/h) |
| 65 mph (104.61 km/h) | 62.15 mph (100.01 km/h) |
| 70 mph (112.65 km/h) | 66.93 mph (107.71 km/h) |
| 75 mph (120.7 km/h) | 71.71 mph (115.4 km/h) |
| 80 mph (128.75 km/h) | 76.49 mph (123.09 km/h) |
| 85 mph (136.79 km/h) | 81.27 mph (130.79 km/h) |
| 90 mph (144.84 km/h) | 86.05 mph (138.48 km/h) |
| 95 mph (152.89 km/h) | 90.83 mph (146.18 km/h) |
| 100 mph (160.93 km/h) | 95.61 mph (153.87 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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