Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/90-16 | 300/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.92 (658.4) | 30.99 (787.2) | 5.07 (128.8) 19.6% |
| Width inches (mm) | 5.51 (140) | 11.81 (300) | 6.3 (160) 114.3% |
| Circum. inches (mm) | 81.43 (2068.42) | 97.36 (2473.06) | 15.93 (404.64) 19.6% |
| Sidewall Height inches (mm) | 4.96 (126) | 6.5 (165) | 1.54 (39) 31% |
| Revolutions per mile (km) | 778.05 (483.46) | 650.75 (404.36) | -127.3 (-79.1) -16.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.91 mph (38.48 km/h) |
| 25 mph (40.23 km/h) | 29.89 mph (48.1 km/h) |
| 30 mph (48.28 km/h) | 35.87 mph (57.73 km/h) |
| 35 mph (56.33 km/h) | 41.85 mph (67.35 km/h) |
| 40 mph (64.37 km/h) | 47.83 mph (76.97 km/h) |
| 45 mph (72.42 km/h) | 53.8 mph (86.59 km/h) |
| 50 mph (80.47 km/h) | 59.78 mph (96.21 km/h) |
| 55 mph (88.51 km/h) | 65.76 mph (105.83 km/h) |
| 60 mph (96.56 km/h) | 71.74 mph (115.45 km/h) |
| 65 mph (104.61 km/h) | 77.72 mph (125.07 km/h) |
| 70 mph (112.65 km/h) | 83.69 mph (134.69 km/h) |
| 75 mph (120.7 km/h) | 89.67 mph (144.31 km/h) |
| 80 mph (128.75 km/h) | 95.65 mph (153.93 km/h) |
| 85 mph (136.79 km/h) | 101.63 mph (163.56 km/h) |
| 90 mph (144.84 km/h) | 107.61 mph (173.18 km/h) |
| 95 mph (152.89 km/h) | 113.58 mph (182.8 km/h) |
| 100 mph (160.93 km/h) | 119.56 mph (192.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1656 | 1924 | 2072 | 2163 | 2262 | 2333 | 2410 | 2502 | 2629 | 2755 | 2896 | 3009 | 3213 | 3439 | 3615 | 3728 | 3791 | 4024 | 4348 | 5053 |
Better Fuel Economy Factory Ratios Increased Power
