Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/45-18 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.33 (668.7) | 26.68 (677.7) | 0.35 (9) 1.3% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 82.71 (2100.78) | 83.82 (2129.06) | 1.11 (28.27) 1.3% |
| Sidewall Height inches (mm) | 4.16 (105.75) | 4.34 (110.25) | 0.18 (4.5) 4.3% |
| Revolutions per mile (km) | 766.07 (476.01) | 755.9 (469.69) | -10.17 (-6.32) -1.3% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.27 mph (32.62 km/h) |
| 25 mph (40.23 km/h) | 25.34 mph (40.78 km/h) |
| 30 mph (48.28 km/h) | 30.4 mph (48.93 km/h) |
| 35 mph (56.33 km/h) | 35.47 mph (57.09 km/h) |
| 40 mph (64.37 km/h) | 40.54 mph (65.24 km/h) |
| 45 mph (72.42 km/h) | 45.61 mph (73.4 km/h) |
| 50 mph (80.47 km/h) | 50.67 mph (81.55 km/h) |
| 55 mph (88.51 km/h) | 55.74 mph (89.71 km/h) |
| 60 mph (96.56 km/h) | 60.81 mph (97.86 km/h) |
| 65 mph (104.61 km/h) | 65.87 mph (106.02 km/h) |
| 70 mph (112.65 km/h) | 70.94 mph (114.17 km/h) |
| 75 mph (120.7 km/h) | 76.01 mph (122.33 km/h) |
| 80 mph (128.75 km/h) | 81.08 mph (130.48 km/h) |
| 85 mph (136.79 km/h) | 86.14 mph (138.64 km/h) |
| 90 mph (144.84 km/h) | 91.21 mph (146.79 km/h) |
| 95 mph (152.89 km/h) | 96.28 mph (154.95 km/h) |
| 100 mph (160.93 km/h) | 101.35 mph (163.1 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1924 | 2235 | 2407 | 2513 | 2628 | 2709 | 2799 | 2906 | 3053 | 3201 | 3364 | 3495 | 3733 | 3995 | 4199 | 4330 | 4404 | 4674 | 5050 | 5869 |
Better Fuel Economy Factory Ratios Increased Power
