Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 37/11.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 37.07 (941.64) | 1.6 (40.64) 4.5% |
| Width inches (mm) | 12.8 (325) | 11.5 (292) | -1.3 (-33) -10.2% |
| Circum. inches (mm) | 111.44 (2830.57) | 116.47 (2958.25) | 5.03 (127.67) 4.5% |
| Sidewall Height inches (mm) | 10.24 (260) | 11.04 (280.32) | 0.8 (20.32) 7.8% |
| Revolutions per mile (km) | 568.56 (353.28) | 544.02 (338.04) | -24.54 (-15.25) -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) | 52.26 mph (84.1 km/h) |
| 55 mph (88.51 km/h) | 57.48 mph (92.51 km/h) |
| 60 mph (96.56 km/h) | 62.71 mph (100.92 km/h) |
| 65 mph (104.61 km/h) | 67.93 mph (109.33 km/h) |
| 70 mph (112.65 km/h) | 73.16 mph (117.74 km/h) |
| 75 mph (120.7 km/h) | 78.38 mph (126.15 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) | 99.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1384 | 1608 | 1732 | 1809 | 1891 | 1950 | 2015 | 2091 | 2197 | 2303 | 2421 | 2516 | 2686 | 2875 | 3022 | 3116 | 3169 | 3364 | 3635 | 4224 |
Better Fuel Economy Factory Ratios Increased Power
