Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/85-17 | 285/85-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.73 (831.3) | 36.07 (916.3) | 3.35 (85) 10.2% |
| Width inches (mm) | 9.25 (235) | 11.22 (285) | 1.97 (50) 21.3% |
| Circum. inches (mm) | 102.82 (2611.61) | 113.33 (2878.64) | 10.51 (267.04) 10.2% |
| Sidewall Height inches (mm) | 7.86 (199.75) | 9.54 (242.25) | 1.67 (42.5) 21.3% |
| Revolutions per mile (km) | 616.23 (382.91) | 559.06 (347.39) | -57.16 (-35.52) -9.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.04 mph (35.48 km/h) |
| 25 mph (40.23 km/h) | 27.56 mph (44.35 km/h) |
| 30 mph (48.28 km/h) | 33.07 mph (53.22 km/h) |
| 35 mph (56.33 km/h) | 38.58 mph (62.09 km/h) |
| 40 mph (64.37 km/h) | 44.09 mph (70.96 km/h) |
| 45 mph (72.42 km/h) | 49.6 mph (79.83 km/h) |
| 50 mph (80.47 km/h) | 55.11 mph (88.7 km/h) |
| 55 mph (88.51 km/h) | 60.62 mph (97.56 km/h) |
| 60 mph (96.56 km/h) | 66.13 mph (106.43 km/h) |
| 65 mph (104.61 km/h) | 71.65 mph (115.3 km/h) |
| 70 mph (112.65 km/h) | 77.16 mph (124.17 km/h) |
| 75 mph (120.7 km/h) | 82.67 mph (133.04 km/h) |
| 80 mph (128.75 km/h) | 88.18 mph (141.91 km/h) |
| 85 mph (136.79 km/h) | 93.69 mph (150.78 km/h) |
| 90 mph (144.84 km/h) | 99.2 mph (159.65 km/h) |
| 95 mph (152.89 km/h) | 104.71 mph (168.52 km/h) |
| 100 mph (160.93 km/h) | 110.22 mph (177.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1423 | 1653 | 1780 | 1859 | 1943 | 2004 | 2070 | 2149 | 2258 | 2367 | 2488 | 2585 | 2761 | 2954 | 3106 | 3203 | 3257 | 3457 | 3735 | 4341 |
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