Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 245/50-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 26.65 (676.8) | 3.09 (78.6) 13.1% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 73.99 (1879.3) | 83.71 (2126.23) | 9.72 (246.93) 13.1% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 4.82 (122.5) | 2.05 (52) 73.8% |
| Revolutions per mile (km) | 856.35 (532.11) | 756.9 (470.32) | -99.45 (-61.8) -11.6% |
245/50-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.63 mph (36.42 km/h) |
| 25 mph (40.23 km/h) | 28.28 mph (45.52 km/h) |
| 30 mph (48.28 km/h) | 33.94 mph (54.62 km/h) |
| 35 mph (56.33 km/h) | 39.6 mph (63.73 km/h) |
| 40 mph (64.37 km/h) | 45.26 mph (72.83 km/h) |
| 45 mph (72.42 km/h) | 50.91 mph (81.94 km/h) |
| 50 mph (80.47 km/h) | 56.57 mph (91.04 km/h) |
| 55 mph (88.51 km/h) | 62.23 mph (100.14 km/h) |
| 60 mph (96.56 km/h) | 67.88 mph (109.25 km/h) |
| 65 mph (104.61 km/h) | 73.54 mph (118.35 km/h) |
| 70 mph (112.65 km/h) | 79.2 mph (127.46 km/h) |
| 75 mph (120.7 km/h) | 84.85 mph (136.56 km/h) |
| 80 mph (128.75 km/h) | 90.51 mph (145.66 km/h) |
| 85 mph (136.79 km/h) | 96.17 mph (154.77 km/h) |
| 90 mph (144.84 km/h) | 101.83 mph (163.87 km/h) |
| 95 mph (152.89 km/h) | 107.48 mph (172.98 km/h) |
| 100 mph (160.93 km/h) | 113.14 mph (182.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1926 | 2238 | 2410 | 2516 | 2631 | 2713 | 2803 | 2910 | 3057 | 3205 | 3369 | 3500 | 3738 | 4000 | 4205 | 4336 | 4410 | 4680 | 5057 | 5877 |
Better Fuel Economy Factory Ratios Increased Power
