Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-18 | 245/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.4 (645.2) | 24.75 (628.7) | -0.65 (-16.5) -2.6% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 79.8 (2026.96) | 77.76 (1975.12) | -2.04 (-51.84) -2.6% |
| Sidewall Height inches (mm) | 3.7 (94) | 3.38 (85.75) | -0.32 (-8.25) -8.8% |
| Revolutions per mile (km) | 793.97 (493.35) | 814.81 (506.3) | 20.84 (12.95) 2.6% |
245/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.49 mph (31.36 km/h) |
| 25 mph (40.23 km/h) | 24.36 mph (39.2 km/h) |
| 30 mph (48.28 km/h) | 29.23 mph (47.05 km/h) |
| 35 mph (56.33 km/h) | 34.1 mph (54.89 km/h) |
| 40 mph (64.37 km/h) | 38.98 mph (62.73 km/h) |
| 45 mph (72.42 km/h) | 43.85 mph (70.57 km/h) |
| 50 mph (80.47 km/h) | 48.72 mph (78.41 km/h) |
| 55 mph (88.51 km/h) | 53.59 mph (86.25 km/h) |
| 60 mph (96.56 km/h) | 58.47 mph (94.09 km/h) |
| 65 mph (104.61 km/h) | 63.34 mph (101.93 km/h) |
| 70 mph (112.65 km/h) | 68.21 mph (109.77 km/h) |
| 75 mph (120.7 km/h) | 73.08 mph (117.61 km/h) |
| 80 mph (128.75 km/h) | 77.95 mph (125.46 km/h) |
| 85 mph (136.79 km/h) | 82.83 mph (133.3 km/h) |
| 90 mph (144.84 km/h) | 87.7 mph (141.14 km/h) |
| 95 mph (152.89 km/h) | 92.57 mph (148.98 km/h) |
| 100 mph (160.93 km/h) | 97.44 mph (156.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2074 | 2409 | 2594 | 2709 | 2832 | 2921 | 3018 | 3132 | 3291 | 3450 | 3626 | 3768 | 4024 | 4306 | 4526 | 4668 | 4747 | 5038 | 5444 | 6326 |
Better Fuel Economy Factory Ratios Increased Power
