Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/85-17 | 245/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.73 (831.3) | 32.43 (823.8) | -0.3 (-7.5) -0.9% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 102.82 (2611.61) | 101.89 (2588.04) | -0.93 (-23.56) -0.9% |
| Sidewall Height inches (mm) | 7.86 (199.75) | 7.72 (196) | -0.15 (-3.75) -1.9% |
| Revolutions per mile (km) | 616.23 (382.91) | 621.84 (386.39) | 5.61 (3.49) 0.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.82 mph (31.9 km/h) |
| 25 mph (40.23 km/h) | 24.77 mph (39.87 km/h) |
| 30 mph (48.28 km/h) | 29.73 mph (47.84 km/h) |
| 35 mph (56.33 km/h) | 34.68 mph (55.82 km/h) |
| 40 mph (64.37 km/h) | 39.64 mph (63.79 km/h) |
| 45 mph (72.42 km/h) | 44.59 mph (71.77 km/h) |
| 50 mph (80.47 km/h) | 49.55 mph (79.74 km/h) |
| 55 mph (88.51 km/h) | 54.5 mph (87.72 km/h) |
| 60 mph (96.56 km/h) | 59.46 mph (95.69 km/h) |
| 65 mph (104.61 km/h) | 64.41 mph (103.66 km/h) |
| 70 mph (112.65 km/h) | 69.37 mph (111.64 km/h) |
| 75 mph (120.7 km/h) | 74.32 mph (119.61 km/h) |
| 80 mph (128.75 km/h) | 79.28 mph (127.59 km/h) |
| 85 mph (136.79 km/h) | 84.23 mph (135.56 km/h) |
| 90 mph (144.84 km/h) | 89.19 mph (143.53 km/h) |
| 95 mph (152.89 km/h) | 94.14 mph (151.51 km/h) |
| 100 mph (160.93 km/h) | 99.1 mph (159.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1582 | 1838 | 1980 | 2067 | 2162 | 2229 | 2303 | 2391 | 2512 | 2633 | 2768 | 2875 | 3071 | 3286 | 3454 | 3562 | 3623 | 3845 | 4155 | 4828 |
Better Fuel Economy Factory Ratios Increased Power
