Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/85-17 | 255/85-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.73 (831.3) | 34.07 (865.3) | 1.34 (34) 4.1% |
| Width inches (mm) | 9.25 (235) | 10.04 (255) | 0.79 (20) 8.5% |
| Circum. inches (mm) | 102.82 (2611.61) | 107.02 (2718.42) | 4.21 (106.81) 4.1% |
| Sidewall Height inches (mm) | 7.86 (199.75) | 8.53 (216.75) | 0.67 (17) 8.5% |
| Revolutions per mile (km) | 616.23 (382.91) | 592.01 (367.86) | -24.21 (-15.05) -3.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.82 mph (33.5 km/h) |
| 25 mph (40.23 km/h) | 26.02 mph (41.88 km/h) |
| 30 mph (48.28 km/h) | 31.23 mph (50.26 km/h) |
| 35 mph (56.33 km/h) | 36.43 mph (58.63 km/h) |
| 40 mph (64.37 km/h) | 41.64 mph (67.01 km/h) |
| 45 mph (72.42 km/h) | 46.84 mph (75.38 km/h) |
| 50 mph (80.47 km/h) | 52.04 mph (83.76 km/h) |
| 55 mph (88.51 km/h) | 57.25 mph (92.13 km/h) |
| 60 mph (96.56 km/h) | 62.45 mph (100.51 km/h) |
| 65 mph (104.61 km/h) | 67.66 mph (108.89 km/h) |
| 70 mph (112.65 km/h) | 72.86 mph (117.26 km/h) |
| 75 mph (120.7 km/h) | 78.07 mph (125.64 km/h) |
| 80 mph (128.75 km/h) | 83.27 mph (134.01 km/h) |
| 85 mph (136.79 km/h) | 88.48 mph (142.39 km/h) |
| 90 mph (144.84 km/h) | 93.68 mph (150.77 km/h) |
| 95 mph (152.89 km/h) | 98.89 mph (159.14 km/h) |
| 100 mph (160.93 km/h) | 104.09 mph (167.52 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1507 | 1750 | 1885 | 1968 | 2058 | 2122 | 2193 | 2276 | 2391 | 2507 | 2635 | 2737 | 2923 | 3129 | 3289 | 3391 | 3449 | 3661 | 3956 | 4597 |
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