Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/90-18 | 225/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736.2) | 28.63 (727.2) | -0.35 (-9) -1.2% |
| Width inches (mm) | 6.1 (155) | 8.86 (225) | 2.76 (70) 45.2% |
| Circum. inches (mm) | 91.06 (2312.84) | 89.94 (2284.57) | -1.11 (-28.27) -1.2% |
| Sidewall Height inches (mm) | 5.49 (139.5) | 5.31 (135) | -0.18 (-4.5) -3.2% |
| Revolutions per mile (km) | 695.83 (432.37) | 704.44 (437.72) | 8.61 (5.35) 1.2% |
225/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.76 mph (31.79 km/h) |
| 25 mph (40.23 km/h) | 24.69 mph (39.74 km/h) |
| 30 mph (48.28 km/h) | 29.63 mph (47.69 km/h) |
| 35 mph (56.33 km/h) | 34.57 mph (55.64 km/h) |
| 40 mph (64.37 km/h) | 39.51 mph (63.59 km/h) |
| 45 mph (72.42 km/h) | 44.45 mph (71.54 km/h) |
| 50 mph (80.47 km/h) | 49.39 mph (79.48 km/h) |
| 55 mph (88.51 km/h) | 54.33 mph (87.43 km/h) |
| 60 mph (96.56 km/h) | 59.27 mph (95.38 km/h) |
| 65 mph (104.61 km/h) | 64.21 mph (103.33 km/h) |
| 70 mph (112.65 km/h) | 69.14 mph (111.28 km/h) |
| 75 mph (120.7 km/h) | 74.08 mph (119.23 km/h) |
| 80 mph (128.75 km/h) | 79.02 mph (127.17 km/h) |
| 85 mph (136.79 km/h) | 83.96 mph (135.12 km/h) |
| 90 mph (144.84 km/h) | 88.9 mph (143.07 km/h) |
| 95 mph (152.89 km/h) | 93.84 mph (151.02 km/h) |
| 100 mph (160.93 km/h) | 98.78 mph (158.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1793 | 2083 | 2243 | 2342 | 2449 | 2525 | 2609 | 2708 | 2845 | 2983 | 3135 | 3257 | 3479 | 3723 | 3913 | 4035 | 4104 | 4356 | 4707 | 5470 |
Better Fuel Economy Factory Ratios Increased Power
