Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 33/12-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 33.01 (838.5) | -2.46 (-62.5) -6.9% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 111.44 (2830.57) | 103.71 (2634.23) | -7.73 (-196.35) -6.9% |
| Sidewall Height inches (mm) | 10.24 (260) | 9.01 (228.75) | -1.23 (-31.25) -12% |
| Revolutions per mile (km) | 568.56 (353.28) | 610.94 (379.62) | 42.38 (26.33) 7.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.61 mph (29.95 km/h) |
| 25 mph (40.23 km/h) | 23.27 mph (37.44 km/h) |
| 30 mph (48.28 km/h) | 27.92 mph (44.93 km/h) |
| 35 mph (56.33 km/h) | 32.57 mph (52.42 km/h) |
| 40 mph (64.37 km/h) | 37.23 mph (59.91 km/h) |
| 45 mph (72.42 km/h) | 41.88 mph (67.4 km/h) |
| 50 mph (80.47 km/h) | 46.53 mph (74.89 km/h) |
| 55 mph (88.51 km/h) | 51.18 mph (82.37 km/h) |
| 60 mph (96.56 km/h) | 55.84 mph (89.86 km/h) |
| 65 mph (104.61 km/h) | 60.49 mph (97.35 km/h) |
| 70 mph (112.65 km/h) | 65.14 mph (104.84 km/h) |
| 75 mph (120.7 km/h) | 69.8 mph (112.33 km/h) |
| 80 mph (128.75 km/h) | 74.45 mph (119.82 km/h) |
| 85 mph (136.79 km/h) | 79.1 mph (127.31 km/h) |
| 90 mph (144.84 km/h) | 83.76 mph (134.79 km/h) |
| 95 mph (152.89 km/h) | 88.41 mph (142.28 km/h) |
| 100 mph (160.93 km/h) | 93.06 mph (149.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1555 | 1806 | 1945 | 2031 | 2124 | 2190 | 2263 | 2349 | 2468 | 2587 | 2719 | 2825 | 3017 | 3229 | 3394 | 3500 | 3559 | 3778 | 4082 | 4744 |
Better Fuel Economy Factory Ratios Increased Power
