Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/85-17 | 315/85-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.73 (831.3) | 38.08 (967.3) | 5.35 (136) 16.4% |
| Width inches (mm) | 9.25 (235) | 12.4 (315) | 3.15 (80) 34% |
| Circum. inches (mm) | 102.82 (2611.61) | 119.64 (3038.86) | 16.82 (427.26) 16.4% |
| Sidewall Height inches (mm) | 7.86 (199.75) | 10.54 (267.75) | 2.68 (68) 34% |
| Revolutions per mile (km) | 616.23 (382.91) | 529.59 (329.07) | -86.64 (-53.84) -14.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.27 mph (37.45 km/h) |
| 25 mph (40.23 km/h) | 29.09 mph (46.82 km/h) |
| 30 mph (48.28 km/h) | 34.91 mph (56.18 km/h) |
| 35 mph (56.33 km/h) | 40.73 mph (65.54 km/h) |
| 40 mph (64.37 km/h) | 46.54 mph (74.91 km/h) |
| 45 mph (72.42 km/h) | 52.36 mph (84.27 km/h) |
| 50 mph (80.47 km/h) | 58.18 mph (93.63 km/h) |
| 55 mph (88.51 km/h) | 64 mph (102.99 km/h) |
| 60 mph (96.56 km/h) | 69.82 mph (112.36 km/h) |
| 65 mph (104.61 km/h) | 75.63 mph (121.72 km/h) |
| 70 mph (112.65 km/h) | 81.45 mph (131.08 km/h) |
| 75 mph (120.7 km/h) | 87.27 mph (140.45 km/h) |
| 80 mph (128.75 km/h) | 93.09 mph (149.81 km/h) |
| 85 mph (136.79 km/h) | 98.91 mph (159.17 km/h) |
| 90 mph (144.84 km/h) | 104.72 mph (168.54 km/h) |
| 95 mph (152.89 km/h) | 110.54 mph (177.9 km/h) |
| 100 mph (160.93 km/h) | 116.36 mph (187.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1348 | 1566 | 1686 | 1761 | 1841 | 1898 | 1961 | 2036 | 2139 | 2242 | 2357 | 2449 | 2615 | 2799 | 2942 | 3034 | 3085 | 3275 | 3538 | 4112 |
Better Fuel Economy Factory Ratios Increased Power
