Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/45-21 | 235/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.39 (771.9) | 30.18 (766.5) | -0.21 (-5.4) -0.7% |
| Width inches (mm) | 10.43 (265) | 9.25 (235) | -1.18 (-30) -11.3% |
| Circum. inches (mm) | 95.47 (2425) | 94.8 (2408.03) | -0.67 (-16.96) -0.7% |
| Sidewall Height inches (mm) | 4.69 (119.25) | 5.09 (129.25) | 0.39 (10) 8.4% |
| Revolutions per mile (km) | 663.65 (412.37) | 668.32 (415.28) | 4.68 (2.91) 0.7% |
235/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.86 mph (31.96 km/h) |
| 25 mph (40.23 km/h) | 24.83 mph (39.95 km/h) |
| 30 mph (48.28 km/h) | 29.79 mph (47.94 km/h) |
| 35 mph (56.33 km/h) | 34.76 mph (55.93 km/h) |
| 40 mph (64.37 km/h) | 39.72 mph (63.92 km/h) |
| 45 mph (72.42 km/h) | 44.69 mph (71.91 km/h) |
| 50 mph (80.47 km/h) | 49.65 mph (79.9 km/h) |
| 55 mph (88.51 km/h) | 54.62 mph (87.89 km/h) |
| 60 mph (96.56 km/h) | 59.58 mph (95.89 km/h) |
| 65 mph (104.61 km/h) | 64.55 mph (103.88 km/h) |
| 70 mph (112.65 km/h) | 69.51 mph (111.87 km/h) |
| 75 mph (120.7 km/h) | 74.48 mph (119.86 km/h) |
| 80 mph (128.75 km/h) | 79.44 mph (127.85 km/h) |
| 85 mph (136.79 km/h) | 84.41 mph (135.84 km/h) |
| 90 mph (144.84 km/h) | 89.37 mph (143.83 km/h) |
| 95 mph (152.89 km/h) | 94.34 mph (151.82 km/h) |
| 100 mph (160.93 km/h) | 99.3 mph (159.81 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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