Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-16 | 37/12.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.47 (926.4) | 37.03 (940.6) | 0.56 (14.2) 1.5% |
| Width inches (mm) | 12.8 (325) | 12.52 (318) | -0.28 (-7) -2.2% |
| Circum. inches (mm) | 114.58 (2910.37) | 116.34 (2954.98) | 1.76 (44.61) 1.5% |
| Sidewall Height inches (mm) | 10.24 (260) | 10.02 (254.4) | -0.22 (-5.6) -2.2% |
| Revolutions per mile (km) | 552.97 (343.6) | 544.62 (338.41) | -8.35 (-5.19) -1.5% |
37/12.5-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.31 mph (32.68 km/h) |
| 25 mph (40.23 km/h) | 25.38 mph (40.85 km/h) |
| 30 mph (48.28 km/h) | 30.46 mph (49.02 km/h) |
| 35 mph (56.33 km/h) | 35.54 mph (57.19 km/h) |
| 40 mph (64.37 km/h) | 40.61 mph (65.36 km/h) |
| 45 mph (72.42 km/h) | 45.69 mph (73.53 km/h) |
| 50 mph (80.47 km/h) | 50.77 mph (81.7 km/h) |
| 55 mph (88.51 km/h) | 55.84 mph (89.87 km/h) |
| 60 mph (96.56 km/h) | 60.92 mph (98.04 km/h) |
| 65 mph (104.61 km/h) | 66 mph (106.21 km/h) |
| 70 mph (112.65 km/h) | 71.07 mph (114.38 km/h) |
| 75 mph (120.7 km/h) | 76.15 mph (122.55 km/h) |
| 80 mph (128.75 km/h) | 81.23 mph (130.72 km/h) |
| 85 mph (136.79 km/h) | 86.3 mph (138.89 km/h) |
| 90 mph (144.84 km/h) | 91.38 mph (147.06 km/h) |
| 95 mph (152.89 km/h) | 96.46 mph (155.23 km/h) |
| 100 mph (160.93 km/h) | 101.53 mph (163.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1386 | 1610 | 1734 | 1811 | 1893 | 1952 | 2017 | 2094 | 2200 | 2306 | 2424 | 2518 | 2689 | 2878 | 3026 | 3120 | 3173 | 3368 | 3639 | 4229 |
Better Fuel Economy Factory Ratios Increased Power
