Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/80-17 | 245/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.8 (807.8) | 30.5 (774.8) | -1.3 (-33) -4.1% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 99.91 (2537.78) | 95.83 (2434.11) | -4.08 (-103.67) -4.1% |
| Sidewall Height inches (mm) | 7.4 (188) | 6.75 (171.5) | -0.65 (-16.5) -8.8% |
| Revolutions per mile (km) | 634.15 (394.04) | 661.16 (410.83) | 27.01 (16.78) 4.3% |
245/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.18 mph (30.87 km/h) |
| 25 mph (40.23 km/h) | 23.98 mph (38.59 km/h) |
| 30 mph (48.28 km/h) | 28.77 mph (46.31 km/h) |
| 35 mph (56.33 km/h) | 33.57 mph (54.03 km/h) |
| 40 mph (64.37 km/h) | 38.37 mph (61.74 km/h) |
| 45 mph (72.42 km/h) | 43.16 mph (69.46 km/h) |
| 50 mph (80.47 km/h) | 47.96 mph (77.18 km/h) |
| 55 mph (88.51 km/h) | 52.75 mph (84.9 km/h) |
| 60 mph (96.56 km/h) | 57.55 mph (92.62 km/h) |
| 65 mph (104.61 km/h) | 62.34 mph (100.33 km/h) |
| 70 mph (112.65 km/h) | 67.14 mph (108.05 km/h) |
| 75 mph (120.7 km/h) | 71.94 mph (115.77 km/h) |
| 80 mph (128.75 km/h) | 76.73 mph (123.49 km/h) |
| 85 mph (136.79 km/h) | 81.53 mph (131.21 km/h) |
| 90 mph (144.84 km/h) | 86.32 mph (138.92 km/h) |
| 95 mph (152.89 km/h) | 91.12 mph (146.64 km/h) |
| 100 mph (160.93 km/h) | 95.91 mph (154.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1683 | 1955 | 2105 | 2198 | 2298 | 2370 | 2449 | 2542 | 2671 | 2799 | 2943 | 3057 | 3265 | 3494 | 3673 | 3787 | 3852 | 4088 | 4418 | 5134 |
Better Fuel Economy Factory Ratios Increased Power
