Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/60-18 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.69 (703.2) | 28.18 (715.7) | 0.49 (12.5) 1.8% |
| Width inches (mm) | 8.07 (205) | 9.25 (235) | 1.18 (30) 14.6% |
| Circum. inches (mm) | 86.98 (2209.17) | 88.52 (2248.44) | 1.55 (39.27) 1.8% |
| Sidewall Height inches (mm) | 4.84 (123) | 5.09 (129.25) | 0.25 (6.25) 5.1% |
| Revolutions per mile (km) | 728.48 (452.66) | 715.76 (444.75) | -12.72 (-7.91) -1.7% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.36 mph (32.76 km/h) |
| 25 mph (40.23 km/h) | 25.44 mph (40.95 km/h) |
| 30 mph (48.28 km/h) | 30.53 mph (49.14 km/h) |
| 35 mph (56.33 km/h) | 35.62 mph (57.33 km/h) |
| 40 mph (64.37 km/h) | 40.71 mph (65.52 km/h) |
| 45 mph (72.42 km/h) | 45.8 mph (73.71 km/h) |
| 50 mph (80.47 km/h) | 50.89 mph (81.9 km/h) |
| 55 mph (88.51 km/h) | 55.98 mph (90.09 km/h) |
| 60 mph (96.56 km/h) | 61.07 mph (98.28 km/h) |
| 65 mph (104.61 km/h) | 66.16 mph (106.47 km/h) |
| 70 mph (112.65 km/h) | 71.24 mph (114.66 km/h) |
| 75 mph (120.7 km/h) | 76.33 mph (122.85 km/h) |
| 80 mph (128.75 km/h) | 81.42 mph (131.04 km/h) |
| 85 mph (136.79 km/h) | 86.51 mph (139.23 km/h) |
| 90 mph (144.84 km/h) | 91.6 mph (147.42 km/h) |
| 95 mph (152.89 km/h) | 96.69 mph (155.61 km/h) |
| 100 mph (160.93 km/h) | 101.78 mph (163.8 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
