Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/35-18 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.65 (600.7) | 25.09 (637.2) | 1.44 (36.5) 6.1% |
| Width inches (mm) | 8.07 (205) | 8.86 (225) | 0.79 (20) 9.8% |
| Circum. inches (mm) | 74.3 (1887.15) | 78.81 (2001.82) | 4.51 (114.67) 6.1% |
| Sidewall Height inches (mm) | 2.82 (71.75) | 3.54 (90) | 0.72 (18.25) 25.4% |
| Revolutions per mile (km) | 852.79 (529.9) | 803.94 (499.54) | -48.85 (-30.35) -5.7% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.22 mph (34.14 km/h) |
| 25 mph (40.23 km/h) | 26.52 mph (42.68 km/h) |
| 30 mph (48.28 km/h) | 31.82 mph (51.21 km/h) |
| 35 mph (56.33 km/h) | 37.13 mph (59.75 km/h) |
| 40 mph (64.37 km/h) | 42.43 mph (68.29 km/h) |
| 45 mph (72.42 km/h) | 47.73 mph (76.82 km/h) |
| 50 mph (80.47 km/h) | 53.04 mph (85.36 km/h) |
| 55 mph (88.51 km/h) | 58.34 mph (93.89 km/h) |
| 60 mph (96.56 km/h) | 63.65 mph (102.43 km/h) |
| 65 mph (104.61 km/h) | 68.95 mph (110.96 km/h) |
| 70 mph (112.65 km/h) | 74.25 mph (119.5 km/h) |
| 75 mph (120.7 km/h) | 79.56 mph (128.04 km/h) |
| 80 mph (128.75 km/h) | 84.86 mph (136.57 km/h) |
| 85 mph (136.79 km/h) | 90.16 mph (145.11 km/h) |
| 90 mph (144.84 km/h) | 95.47 mph (153.64 km/h) |
| 95 mph (152.89 km/h) | 100.77 mph (162.18 km/h) |
| 100 mph (160.93 km/h) | 106.08 mph (170.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2046 | 2377 | 2560 | 2673 | 2795 | 2882 | 2977 | 3091 | 3247 | 3404 | 3578 | 3717 | 3970 | 4248 | 4466 | 4605 | 4684 | 4971 | 5372 | 6242 |
Better Fuel Economy Factory Ratios Increased Power
