Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/85-17 | 255/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.73 (831.3) | 35.07 (890.8) | 2.34 (59.5) 7.2% |
| Width inches (mm) | 9.25 (235) | 10.04 (255) | 0.79 (20) 8.5% |
| Circum. inches (mm) | 102.82 (2611.61) | 110.18 (2798.53) | 7.36 (186.92) 7.2% |
| Sidewall Height inches (mm) | 7.86 (199.75) | 9.04 (229.5) | 1.17 (29.75) 14.9% |
| Revolutions per mile (km) | 616.23 (382.91) | 575.07 (357.33) | -41.16 (-25.58) -6.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.43 mph (34.49 km/h) |
| 25 mph (40.23 km/h) | 26.79 mph (43.11 km/h) |
| 30 mph (48.28 km/h) | 32.15 mph (51.74 km/h) |
| 35 mph (56.33 km/h) | 37.51 mph (60.36 km/h) |
| 40 mph (64.37 km/h) | 42.86 mph (68.98 km/h) |
| 45 mph (72.42 km/h) | 48.22 mph (77.6 km/h) |
| 50 mph (80.47 km/h) | 53.58 mph (86.23 km/h) |
| 55 mph (88.51 km/h) | 58.94 mph (94.85 km/h) |
| 60 mph (96.56 km/h) | 64.29 mph (103.47 km/h) |
| 65 mph (104.61 km/h) | 69.65 mph (112.09 km/h) |
| 70 mph (112.65 km/h) | 75.01 mph (120.72 km/h) |
| 75 mph (120.7 km/h) | 80.37 mph (129.34 km/h) |
| 80 mph (128.75 km/h) | 85.73 mph (137.96 km/h) |
| 85 mph (136.79 km/h) | 91.08 mph (146.59 km/h) |
| 90 mph (144.84 km/h) | 96.44 mph (155.21 km/h) |
| 95 mph (152.89 km/h) | 101.8 mph (163.83 km/h) |
| 100 mph (160.93 km/h) | 107.16 mph (172.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1463 | 1700 | 1831 | 1912 | 1999 | 2061 | 2130 | 2211 | 2323 | 2435 | 2559 | 2659 | 2840 | 3039 | 3195 | 3294 | 3350 | 3556 | 3842 | 4465 |
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