Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 225/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 24.2 (614.7) | 0.65 (16.5) 2.8% |
| Width inches (mm) | 9.25 (235) | 8.86 (225) | -0.39 (-10) -4.3% |
| Circum. inches (mm) | 73.99 (1879.3) | 76.03 (1931.14) | 2.04 (51.84) 2.8% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 3.1 (78.75) | 0.32 (8.25) 11.7% |
| Revolutions per mile (km) | 856.35 (532.11) | 833.37 (517.83) | -22.99 (-14.28) -2.7% |
225/35-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.55 mph (33.07 km/h) |
| 25 mph (40.23 km/h) | 25.69 mph (41.34 km/h) |
| 30 mph (48.28 km/h) | 30.83 mph (49.61 km/h) |
| 35 mph (56.33 km/h) | 35.97 mph (57.88 km/h) |
| 40 mph (64.37 km/h) | 41.1 mph (66.15 km/h) |
| 45 mph (72.42 km/h) | 46.24 mph (74.42 km/h) |
| 50 mph (80.47 km/h) | 51.38 mph (82.69 km/h) |
| 55 mph (88.51 km/h) | 56.52 mph (90.96 km/h) |
| 60 mph (96.56 km/h) | 61.65 mph (99.22 km/h) |
| 65 mph (104.61 km/h) | 66.79 mph (107.49 km/h) |
| 70 mph (112.65 km/h) | 71.93 mph (115.76 km/h) |
| 75 mph (120.7 km/h) | 77.07 mph (124.03 km/h) |
| 80 mph (128.75 km/h) | 82.21 mph (132.3 km/h) |
| 85 mph (136.79 km/h) | 87.34 mph (140.57 km/h) |
| 90 mph (144.84 km/h) | 92.48 mph (148.84 km/h) |
| 95 mph (152.89 km/h) | 97.62 mph (157.11 km/h) |
| 100 mph (160.93 km/h) | 102.76 mph (165.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2121 | 2464 | 2653 | 2771 | 2897 | 2987 | 3086 | 3204 | 3366 | 3529 | 3709 | 3853 | 4115 | 4404 | 4630 | 4774 | 4855 | 5153 | 5568 | 6471 |
Better Fuel Economy Factory Ratios Increased Power
