Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 215/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 26.46 (672.2) | 1.14 (29) 4.5% |
| Width inches (mm) | 6.1 (155) | 8.46 (215) | 2.36 (60) 38.7% |
| Circum. inches (mm) | 79.55 (2020.67) | 83.14 (2111.78) | 3.59 (91.11) 4.5% |
| Sidewall Height inches (mm) | 3.66 (93) | 4.23 (107.5) | 0.57 (14.5) 15.6% |
| Revolutions per mile (km) | 796.44 (494.88) | 762.08 (473.53) | -34.36 (-21.35) -4.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.9 mph (33.64 km/h) |
| 25 mph (40.23 km/h) | 26.13 mph (42.05 km/h) |
| 30 mph (48.28 km/h) | 31.35 mph (50.46 km/h) |
| 35 mph (56.33 km/h) | 36.58 mph (58.87 km/h) |
| 40 mph (64.37 km/h) | 41.8 mph (67.28 km/h) |
| 45 mph (72.42 km/h) | 47.03 mph (75.69 km/h) |
| 50 mph (80.47 km/h) | 52.25 mph (84.1 km/h) |
| 55 mph (88.51 km/h) | 57.48 mph (92.5 km/h) |
| 60 mph (96.56 km/h) | 62.71 mph (100.91 km/h) |
| 65 mph (104.61 km/h) | 67.93 mph (109.32 km/h) |
| 70 mph (112.65 km/h) | 73.16 mph (117.73 km/h) |
| 75 mph (120.7 km/h) | 78.38 mph (126.14 km/h) |
| 80 mph (128.75 km/h) | 83.61 mph (134.55 km/h) |
| 85 mph (136.79 km/h) | 88.83 mph (142.96 km/h) |
| 90 mph (144.84 km/h) | 94.06 mph (151.37 km/h) |
| 95 mph (152.89 km/h) | 99.28 mph (159.78 km/h) |
| 100 mph (160.93 km/h) | 104.51 mph (168.19 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
