Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-17 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.76 (679.8) | 26.86 (682.2) | 0.09 (2.4) 0.4% |
| Width inches (mm) | 6.1 (155) | 8.86 (225) | 2.76 (70) 45.2% |
| Circum. inches (mm) | 84.08 (2135.65) | 84.38 (2143.19) | 0.3 (7.54) 0.4% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.43 (112.5) | -0.45 (-11.5) -9.3% |
| Revolutions per mile (km) | 753.56 (468.24) | 750.91 (466.59) | -2.65 (-1.65) -0.4% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.07 mph (32.3 km/h) |
| 25 mph (40.23 km/h) | 25.09 mph (40.38 km/h) |
| 30 mph (48.28 km/h) | 30.11 mph (48.45 km/h) |
| 35 mph (56.33 km/h) | 35.12 mph (56.53 km/h) |
| 40 mph (64.37 km/h) | 40.14 mph (64.6 km/h) |
| 45 mph (72.42 km/h) | 45.16 mph (72.68 km/h) |
| 50 mph (80.47 km/h) | 50.18 mph (80.75 km/h) |
| 55 mph (88.51 km/h) | 55.19 mph (88.83 km/h) |
| 60 mph (96.56 km/h) | 60.21 mph (96.9 km/h) |
| 65 mph (104.61 km/h) | 65.23 mph (104.98 km/h) |
| 70 mph (112.65 km/h) | 70.25 mph (113.05 km/h) |
| 75 mph (120.7 km/h) | 75.26 mph (121.13 km/h) |
| 80 mph (128.75 km/h) | 80.28 mph (129.2 km/h) |
| 85 mph (136.79 km/h) | 85.3 mph (137.28 km/h) |
| 90 mph (144.84 km/h) | 90.32 mph (145.35 km/h) |
| 95 mph (152.89 km/h) | 95.34 mph (153.43 km/h) |
| 100 mph (160.93 km/h) | 100.35 mph (161.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1911 | 2220 | 2391 | 2496 | 2610 | 2692 | 2781 | 2887 | 3033 | 3179 | 3342 | 3472 | 3708 | 3968 | 4171 | 4302 | 4375 | 4643 | 5017 | 5830 |
Better Fuel Economy Factory Ratios Increased Power
