Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-17 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.52 (724.3) | 28.18 (715.7) | -0.34 (-8.6) -1.2% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 89.58 (2275.46) | 88.52 (2248.44) | -1.06 (-27.02) -1.2% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 5.09 (129.25) | -0.67 (-17) -11.6% |
| Revolutions per mile (km) | 707.26 (439.47) | 715.76 (444.75) | 8.5 (5.28) 1.2% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.76 mph (31.8 km/h) |
| 25 mph (40.23 km/h) | 24.7 mph (39.76 km/h) |
| 30 mph (48.28 km/h) | 29.64 mph (47.71 km/h) |
| 35 mph (56.33 km/h) | 34.58 mph (55.66 km/h) |
| 40 mph (64.37 km/h) | 39.53 mph (63.61 km/h) |
| 45 mph (72.42 km/h) | 44.47 mph (71.56 km/h) |
| 50 mph (80.47 km/h) | 49.41 mph (79.51 km/h) |
| 55 mph (88.51 km/h) | 54.35 mph (87.46 km/h) |
| 60 mph (96.56 km/h) | 59.29 mph (95.41 km/h) |
| 65 mph (104.61 km/h) | 64.23 mph (103.37 km/h) |
| 70 mph (112.65 km/h) | 69.17 mph (111.32 km/h) |
| 75 mph (120.7 km/h) | 74.11 mph (119.27 km/h) |
| 80 mph (128.75 km/h) | 79.05 mph (127.22 km/h) |
| 85 mph (136.79 km/h) | 83.99 mph (135.17 km/h) |
| 90 mph (144.84 km/h) | 88.93 mph (143.12 km/h) |
| 95 mph (152.89 km/h) | 93.87 mph (151.07 km/h) |
| 100 mph (160.93 km/h) | 98.81 mph (159.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1821 | 2116 | 2279 | 2380 | 2488 | 2566 | 2651 | 2752 | 2891 | 3031 | 3186 | 3310 | 3534 | 3782 | 3976 | 4100 | 4170 | 4426 | 4782 | 5557 |
Better Fuel Economy Factory Ratios Increased Power
