Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 210/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 26.27 (667.2) | -1.65 (-42) -5.9% |
| Width inches (mm) | 7.09 (180) | 8.27 (210) | 1.18 (30) 16.7% |
| Circum. inches (mm) | 87.72 (2228.02) | 82.52 (2096.07) | -5.19 (-131.95) -5.9% |
| Sidewall Height inches (mm) | 4.96 (126) | 4.13 (105) | -0.83 (-21) -16.7% |
| Revolutions per mile (km) | 722.32 (448.83) | 767.79 (477.08) | 45.47 (28.25) 6.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.82 mph (30.28 km/h) |
| 25 mph (40.23 km/h) | 23.52 mph (37.85 km/h) |
| 30 mph (48.28 km/h) | 28.22 mph (45.42 km/h) |
| 35 mph (56.33 km/h) | 32.93 mph (52.99 km/h) |
| 40 mph (64.37 km/h) | 37.63 mph (60.56 km/h) |
| 45 mph (72.42 km/h) | 42.34 mph (68.13 km/h) |
| 50 mph (80.47 km/h) | 47.04 mph (75.7 km/h) |
| 55 mph (88.51 km/h) | 51.74 mph (83.27 km/h) |
| 60 mph (96.56 km/h) | 56.45 mph (90.84 km/h) |
| 65 mph (104.61 km/h) | 61.15 mph (98.41 km/h) |
| 70 mph (112.65 km/h) | 65.85 mph (105.98 km/h) |
| 75 mph (120.7 km/h) | 70.56 mph (113.55 km/h) |
| 80 mph (128.75 km/h) | 75.26 mph (121.12 km/h) |
| 85 mph (136.79 km/h) | 79.97 mph (128.69 km/h) |
| 90 mph (144.84 km/h) | 84.67 mph (136.26 km/h) |
| 95 mph (152.89 km/h) | 89.37 mph (143.83 km/h) |
| 100 mph (160.93 km/h) | 94.08 mph (151.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1954 | 2270 | 2444 | 2553 | 2669 | 2752 | 2844 | 2952 | 3101 | 3251 | 3417 | 3550 | 3791 | 4057 | 4265 | 4398 | 4473 | 4748 | 5130 | 5961 |
Better Fuel Economy Factory Ratios Increased Power
