Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-18 | 285/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.04 (712.2) | 29.22 (742.2) | 1.18 (30) 4.2% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 88.09 (2237.44) | 91.8 (2331.69) | 3.71 (94.25) 4.2% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 5.61 (142.5) | 0.59 (15) 11.8% |
| Revolutions per mile (km) | 719.28 (446.94) | 690.2 (428.87) | -29.07 (-18.07) -4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.84 mph (33.54 km/h) |
| 25 mph (40.23 km/h) | 26.05 mph (41.93 km/h) |
| 30 mph (48.28 km/h) | 31.26 mph (50.31 km/h) |
| 35 mph (56.33 km/h) | 36.47 mph (58.7 km/h) |
| 40 mph (64.37 km/h) | 41.68 mph (67.09 km/h) |
| 45 mph (72.42 km/h) | 46.9 mph (75.47 km/h) |
| 50 mph (80.47 km/h) | 52.11 mph (83.86 km/h) |
| 55 mph (88.51 km/h) | 57.32 mph (92.24 km/h) |
| 60 mph (96.56 km/h) | 62.53 mph (100.63 km/h) |
| 65 mph (104.61 km/h) | 67.74 mph (109.01 km/h) |
| 70 mph (112.65 km/h) | 72.95 mph (117.4 km/h) |
| 75 mph (120.7 km/h) | 78.16 mph (125.79 km/h) |
| 80 mph (128.75 km/h) | 83.37 mph (134.17 km/h) |
| 85 mph (136.79 km/h) | 88.58 mph (142.56 km/h) |
| 90 mph (144.84 km/h) | 93.79 mph (150.94 km/h) |
| 95 mph (152.89 km/h) | 99 mph (159.33 km/h) |
| 100 mph (160.93 km/h) | 104.21 mph (167.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1756 | 2040 | 2197 | 2295 | 2399 | 2474 | 2556 | 2653 | 2788 | 2922 | 3072 | 3191 | 3408 | 3647 | 3834 | 3954 | 4021 | 4268 | 4612 | 5359 |
Better Fuel Economy Factory Ratios Increased Power
