Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-16 | 215/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.86 (631.4) | 26.46 (672.2) | 1.61 (40.8) 6.5% |
| Width inches (mm) | 4.92 (125) | 8.46 (215) | 3.54 (90) 72% |
| Circum. inches (mm) | 78.09 (1983.6) | 83.14 (2111.78) | 5.05 (128.18) 6.5% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 4.23 (107.5) | -0.2 (-5) -4.4% |
| Revolutions per mile (km) | 811.32 (504.13) | 762.08 (473.53) | -49.24 (-30.6) -6.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.29 mph (34.27 km/h) |
| 25 mph (40.23 km/h) | 26.62 mph (42.83 km/h) |
| 30 mph (48.28 km/h) | 31.94 mph (51.4 km/h) |
| 35 mph (56.33 km/h) | 37.26 mph (59.97 km/h) |
| 40 mph (64.37 km/h) | 42.58 mph (68.53 km/h) |
| 45 mph (72.42 km/h) | 47.91 mph (77.1 km/h) |
| 50 mph (80.47 km/h) | 53.23 mph (85.67 km/h) |
| 55 mph (88.51 km/h) | 58.55 mph (94.23 km/h) |
| 60 mph (96.56 km/h) | 63.88 mph (102.8 km/h) |
| 65 mph (104.61 km/h) | 69.2 mph (111.37 km/h) |
| 70 mph (112.65 km/h) | 74.52 mph (119.93 km/h) |
| 75 mph (120.7 km/h) | 79.85 mph (128.5 km/h) |
| 80 mph (128.75 km/h) | 85.17 mph (137.07 km/h) |
| 85 mph (136.79 km/h) | 90.49 mph (145.63 km/h) |
| 90 mph (144.84 km/h) | 95.82 mph (154.2 km/h) |
| 95 mph (152.89 km/h) | 101.14 mph (162.77 km/h) |
| 100 mph (160.93 km/h) | 106.46 mph (171.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1939 | 2253 | 2426 | 2534 | 2649 | 2732 | 2822 | 2930 | 3078 | 3227 | 3392 | 3524 | 3763 | 4027 | 4234 | 4366 | 4440 | 4712 | 5092 | 5917 |
Better Fuel Economy Factory Ratios Increased Power
