Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/60-18 | 255/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.05 (763.2) | 30.04 (763) | -0.01 (-0.2) -0% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 94.4 (2397.66) | 94.37 (2397.04) | -0.02 (-0.63) -0% |
| Sidewall Height inches (mm) | 6.02 (153) | 5.02 (127.5) | -1 (-25.5) -16.7% |
| Revolutions per mile (km) | 671.21 (417.07) | 671.39 (417.18) | 0.18 (0.11) 0% |
255/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.99 mph (32.18 km/h) |
| 25 mph (40.23 km/h) | 24.99 mph (40.22 km/h) |
| 30 mph (48.28 km/h) | 29.99 mph (48.27 km/h) |
| 35 mph (56.33 km/h) | 34.99 mph (56.31 km/h) |
| 40 mph (64.37 km/h) | 39.99 mph (64.36 km/h) |
| 45 mph (72.42 km/h) | 44.99 mph (72.4 km/h) |
| 50 mph (80.47 km/h) | 49.99 mph (80.45 km/h) |
| 55 mph (88.51 km/h) | 54.99 mph (88.49 km/h) |
| 60 mph (96.56 km/h) | 59.98 mph (96.54 km/h) |
| 65 mph (104.61 km/h) | 64.98 mph (104.58 km/h) |
| 70 mph (112.65 km/h) | 69.98 mph (112.62 km/h) |
| 75 mph (120.7 km/h) | 74.98 mph (120.67 km/h) |
| 80 mph (128.75 km/h) | 79.98 mph (128.71 km/h) |
| 85 mph (136.79 km/h) | 84.98 mph (136.76 km/h) |
| 90 mph (144.84 km/h) | 89.98 mph (144.8 km/h) |
| 95 mph (152.89 km/h) | 94.98 mph (152.85 km/h) |
| 100 mph (160.93 km/h) | 99.97 mph (160.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1709 | 1985 | 2138 | 2232 | 2334 | 2407 | 2486 | 2581 | 2712 | 2843 | 2988 | 3104 | 3315 | 3548 | 3730 | 3846 | 3912 | 4151 | 4486 | 5213 |
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