Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-20 | 235/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.04 (763) | 30.03 (762.7) | -0.01 (-0.3) -0% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 94.37 (2397.04) | 94.33 (2396.09) | -0.04 (-0.94) -0% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 6.01 (152.75) | 0.99 (25.25) 19.8% |
| Revolutions per mile (km) | 671.39 (417.18) | 671.65 (417.35) | 0.26 (0.16) 0% |
235/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.99 mph (32.17 km/h) |
| 25 mph (40.23 km/h) | 24.99 mph (40.22 km/h) |
| 30 mph (48.28 km/h) | 29.99 mph (48.26 km/h) |
| 35 mph (56.33 km/h) | 34.99 mph (56.31 km/h) |
| 40 mph (64.37 km/h) | 39.98 mph (64.35 km/h) |
| 45 mph (72.42 km/h) | 44.98 mph (72.39 km/h) |
| 50 mph (80.47 km/h) | 49.98 mph (80.44 km/h) |
| 55 mph (88.51 km/h) | 54.98 mph (88.48 km/h) |
| 60 mph (96.56 km/h) | 59.98 mph (96.52 km/h) |
| 65 mph (104.61 km/h) | 64.97 mph (104.57 km/h) |
| 70 mph (112.65 km/h) | 69.97 mph (112.61 km/h) |
| 75 mph (120.7 km/h) | 74.97 mph (120.65 km/h) |
| 80 mph (128.75 km/h) | 79.97 mph (128.7 km/h) |
| 85 mph (136.79 km/h) | 84.97 mph (136.74 km/h) |
| 90 mph (144.84 km/h) | 89.96 mph (144.78 km/h) |
| 95 mph (152.89 km/h) | 94.96 mph (152.83 km/h) |
| 100 mph (160.93 km/h) | 99.96 mph (160.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1709 | 1986 | 2138 | 2233 | 2335 | 2407 | 2487 | 2582 | 2713 | 2844 | 2989 | 3106 | 3317 | 3549 | 3731 | 3848 | 3913 | 4153 | 4488 | 5215 |
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