Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-16 | 37/13.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.47 (926.4) | 36.99 (939.44) | 0.51 (13.04) 1.4% |
| Width inches (mm) | 12.8 (325) | 13.5 (343) | 0.71 (18) 5.5% |
| Circum. inches (mm) | 114.58 (2910.37) | 116.19 (2951.34) | 1.61 (40.97) 1.4% |
| Sidewall Height inches (mm) | 10.24 (260) | 9.99 (253.82) | -0.24 (-6.18) -2.4% |
| Revolutions per mile (km) | 552.97 (343.6) | 545.29 (338.83) | -7.68 (-4.77) -1.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.28 mph (32.64 km/h) |
| 25 mph (40.23 km/h) | 25.35 mph (40.8 km/h) |
| 30 mph (48.28 km/h) | 30.42 mph (48.96 km/h) |
| 35 mph (56.33 km/h) | 35.49 mph (57.12 km/h) |
| 40 mph (64.37 km/h) | 40.56 mph (65.28 km/h) |
| 45 mph (72.42 km/h) | 45.63 mph (73.44 km/h) |
| 50 mph (80.47 km/h) | 50.7 mph (81.6 km/h) |
| 55 mph (88.51 km/h) | 55.77 mph (89.76 km/h) |
| 60 mph (96.56 km/h) | 60.84 mph (97.92 km/h) |
| 65 mph (104.61 km/h) | 65.91 mph (106.08 km/h) |
| 70 mph (112.65 km/h) | 70.99 mph (114.24 km/h) |
| 75 mph (120.7 km/h) | 76.06 mph (122.4 km/h) |
| 80 mph (128.75 km/h) | 81.13 mph (130.56 km/h) |
| 85 mph (136.79 km/h) | 86.2 mph (138.72 km/h) |
| 90 mph (144.84 km/h) | 91.27 mph (146.88 km/h) |
| 95 mph (152.89 km/h) | 96.34 mph (155.04 km/h) |
| 100 mph (160.93 km/h) | 101.41 mph (163.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1388 | 1612 | 1736 | 1813 | 1895 | 1955 | 2019 | 2096 | 2203 | 2309 | 2427 | 2521 | 2693 | 2882 | 3029 | 3124 | 3177 | 3372 | 3643 | 4234 |
Better Fuel Economy Factory Ratios Increased Power
