Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/40-18 | 205/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.46 (621.2) | 23.65 (600.7) | -0.81 (-20.5) -3.3% |
| Width inches (mm) | 8.07 (205) | 8.07 (205) | 0 (0) 0% |
| Circum. inches (mm) | 76.83 (1951.56) | 74.3 (1887.15) | -2.54 (-64.4) -3.3% |
| Sidewall Height inches (mm) | 3.23 (82) | 2.82 (71.75) | -0.4 (-10.25) -12.5% |
| Revolutions per mile (km) | 824.65 (512.41) | 852.79 (529.9) | 28.14 (17.49) 3.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.34 mph (31.12 km/h) |
| 25 mph (40.23 km/h) | 24.17 mph (38.91 km/h) |
| 30 mph (48.28 km/h) | 29.01 mph (46.69 km/h) |
| 35 mph (56.33 km/h) | 33.84 mph (54.47 km/h) |
| 40 mph (64.37 km/h) | 38.68 mph (62.25 km/h) |
| 45 mph (72.42 km/h) | 43.51 mph (70.03 km/h) |
| 50 mph (80.47 km/h) | 48.35 mph (77.81 km/h) |
| 55 mph (88.51 km/h) | 53.18 mph (85.59 km/h) |
| 60 mph (96.56 km/h) | 58.02 mph (93.37 km/h) |
| 65 mph (104.61 km/h) | 62.85 mph (101.16 km/h) |
| 70 mph (112.65 km/h) | 67.69 mph (108.94 km/h) |
| 75 mph (120.7 km/h) | 72.52 mph (116.72 km/h) |
| 80 mph (128.75 km/h) | 77.36 mph (124.5 km/h) |
| 85 mph (136.79 km/h) | 82.19 mph (132.28 km/h) |
| 90 mph (144.84 km/h) | 87.03 mph (140.06 km/h) |
| 95 mph (152.89 km/h) | 91.86 mph (147.84 km/h) |
| 100 mph (160.93 km/h) | 96.7 mph (155.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2170 | 2521 | 2715 | 2835 | 2964 | 3057 | 3158 | 3278 | 3445 | 3611 | 3796 | 3943 | 4211 | 4507 | 4737 | 4885 | 4968 | 5273 | 5698 | 6621 |
Better Fuel Economy Factory Ratios Increased Power
