Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/35-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.65 (600.7) | 25.72 (653.2) | 2.07 (52.5) 8.7% |
| Width inches (mm) | 8.07 (205) | 9.65 (245) | 1.57 (40) 19.5% |
| Circum. inches (mm) | 74.3 (1887.15) | 80.79 (2052.09) | 6.49 (164.93) 8.7% |
| Sidewall Height inches (mm) | 2.82 (71.75) | 3.86 (98) | 1.03 (26.25) 36.6% |
| Revolutions per mile (km) | 852.79 (529.9) | 784.25 (487.31) | -68.54 (-42.59) -8% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.75 mph (35 km/h) |
| 25 mph (40.23 km/h) | 27.18 mph (43.75 km/h) |
| 30 mph (48.28 km/h) | 32.62 mph (52.5 km/h) |
| 35 mph (56.33 km/h) | 38.06 mph (61.25 km/h) |
| 40 mph (64.37 km/h) | 43.5 mph (70 km/h) |
| 45 mph (72.42 km/h) | 48.93 mph (78.75 km/h) |
| 50 mph (80.47 km/h) | 54.37 mph (87.5 km/h) |
| 55 mph (88.51 km/h) | 59.81 mph (96.25 km/h) |
| 60 mph (96.56 km/h) | 65.24 mph (105 km/h) |
| 65 mph (104.61 km/h) | 70.68 mph (113.75 km/h) |
| 70 mph (112.65 km/h) | 76.12 mph (122.5 km/h) |
| 75 mph (120.7 km/h) | 81.55 mph (131.25 km/h) |
| 80 mph (128.75 km/h) | 86.99 mph (140 km/h) |
| 85 mph (136.79 km/h) | 92.43 mph (148.75 km/h) |
| 90 mph (144.84 km/h) | 97.87 mph (157.5 km/h) |
| 95 mph (152.89 km/h) | 103.3 mph (166.25 km/h) |
| 100 mph (160.93 km/h) | 108.74 mph (175 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | 2318 | 2497 | 2607 | 2726 | 2811 | 2904 | 3015 | 3168 | 3321 | 3490 | 3626 | 3873 | 4144 | 4357 | 4493 | 4569 | 4849 | 5240 | 6089 |
Better Fuel Economy Factory Ratios Increased Power
