Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 37/13.5-20 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.01 (940.18) | 33.16 (842.2) | -3.86 (-97.98) -10.4% |
| Width inches (mm) | 13.5 (343) | 10.83 (275) | -2.68 (-68) -19.8% |
| Circum. inches (mm) | 116.29 (2953.66) | 104.17 (2645.85) | -12.12 (-307.81) -10.4% |
| Sidewall Height inches (mm) | 8.51 (216.09) | 7.58 (192.5) | -0.93 (-23.59) -10.9% |
| Revolutions per mile (km) | 544.86 (338.56) | 608.25 (377.95) | 63.39 (39.39) 11.6% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.92 mph (28.83 km/h) |
| 25 mph (40.23 km/h) | 22.39 mph (36.04 km/h) |
| 30 mph (48.28 km/h) | 26.87 mph (43.25 km/h) |
| 35 mph (56.33 km/h) | 31.35 mph (50.46 km/h) |
| 40 mph (64.37 km/h) | 35.83 mph (57.67 km/h) |
| 45 mph (72.42 km/h) | 40.31 mph (64.87 km/h) |
| 50 mph (80.47 km/h) | 44.79 mph (72.08 km/h) |
| 55 mph (88.51 km/h) | 49.27 mph (79.29 km/h) |
| 60 mph (96.56 km/h) | 53.75 mph (86.5 km/h) |
| 65 mph (104.61 km/h) | 58.23 mph (93.71 km/h) |
| 70 mph (112.65 km/h) | 62.71 mph (100.91 km/h) |
| 75 mph (120.7 km/h) | 67.18 mph (108.12 km/h) |
| 80 mph (128.75 km/h) | 71.66 mph (115.33 km/h) |
| 85 mph (136.79 km/h) | 76.14 mph (122.54 km/h) |
| 90 mph (144.84 km/h) | 80.62 mph (129.75 km/h) |
| 95 mph (152.89 km/h) | 85.1 mph (136.95 km/h) |
| 100 mph (160.93 km/h) | 89.58 mph (144.16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
Better Fuel Economy Factory Ratios Increased Power
