Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 26.86 (682.2) | -2.66 (-67.5) -9% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 92.73 (2355.25) | 84.38 (2143.19) | -8.35 (-212.06) -9% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 4.43 (112.5) | -1.33 (-33.75) -23.1% |
| Revolutions per mile (km) | 683.3 (424.58) | 750.91 (466.59) | 67.61 (42.01) 9.9% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.2 mph (29.29 km/h) |
| 25 mph (40.23 km/h) | 22.75 mph (36.61 km/h) |
| 30 mph (48.28 km/h) | 27.3 mph (43.93 km/h) |
| 35 mph (56.33 km/h) | 31.85 mph (51.26 km/h) |
| 40 mph (64.37 km/h) | 36.4 mph (58.58 km/h) |
| 45 mph (72.42 km/h) | 40.95 mph (65.9 km/h) |
| 50 mph (80.47 km/h) | 45.5 mph (73.22 km/h) |
| 55 mph (88.51 km/h) | 50.05 mph (80.54 km/h) |
| 60 mph (96.56 km/h) | 54.6 mph (87.87 km/h) |
| 65 mph (104.61 km/h) | 59.15 mph (95.19 km/h) |
| 70 mph (112.65 km/h) | 63.7 mph (102.51 km/h) |
| 75 mph (120.7 km/h) | 68.25 mph (109.83 km/h) |
| 80 mph (128.75 km/h) | 72.8 mph (117.16 km/h) |
| 85 mph (136.79 km/h) | 77.35 mph (124.48 km/h) |
| 90 mph (144.84 km/h) | 81.9 mph (131.8 km/h) |
| 95 mph (152.89 km/h) | 86.45 mph (139.12 km/h) |
| 100 mph (160.93 km/h) | 91 mph (146.44 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
