Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-18 | 245/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 24.75 (628.7) | -0.33 (-8.5) -1.3% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 78.81 (2001.82) | 77.76 (1975.12) | -1.05 (-26.7) -1.3% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.38 (85.75) | -0.17 (-4.25) -4.7% |
| Revolutions per mile (km) | 803.94 (499.54) | 814.81 (506.3) | 10.87 (6.75) 1.4% |
245/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.73 mph (31.76 km/h) |
| 25 mph (40.23 km/h) | 24.67 mph (39.7 km/h) |
| 30 mph (48.28 km/h) | 29.6 mph (47.64 km/h) |
| 35 mph (56.33 km/h) | 34.53 mph (55.58 km/h) |
| 40 mph (64.37 km/h) | 39.47 mph (63.52 km/h) |
| 45 mph (72.42 km/h) | 44.4 mph (71.45 km/h) |
| 50 mph (80.47 km/h) | 49.33 mph (79.39 km/h) |
| 55 mph (88.51 km/h) | 54.27 mph (87.33 km/h) |
| 60 mph (96.56 km/h) | 59.2 mph (95.27 km/h) |
| 65 mph (104.61 km/h) | 64.13 mph (103.21 km/h) |
| 70 mph (112.65 km/h) | 69.07 mph (111.15 km/h) |
| 75 mph (120.7 km/h) | 74 mph (119.09 km/h) |
| 80 mph (128.75 km/h) | 78.93 mph (127.03 km/h) |
| 85 mph (136.79 km/h) | 83.87 mph (134.97 km/h) |
| 90 mph (144.84 km/h) | 88.8 mph (142.91 km/h) |
| 95 mph (152.89 km/h) | 93.73 mph (150.85 km/h) |
| 100 mph (160.93 km/h) | 98.67 mph (158.79 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
