Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 325/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 37.47 (951.8) | 2 (50.8) 5.6% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 111.44 (2830.57) | 117.72 (2990.17) | 6.28 (159.59) 5.6% |
| Sidewall Height inches (mm) | 10.24 (260) | 10.24 (260) | 0 (0) 0% |
| Revolutions per mile (km) | 568.56 (353.28) | 538.21 (334.43) | -30.35 (-18.86) -5.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.13 mph (34 km/h) |
| 25 mph (40.23 km/h) | 26.41 mph (42.5 km/h) |
| 30 mph (48.28 km/h) | 31.69 mph (51 km/h) |
| 35 mph (56.33 km/h) | 36.97 mph (59.5 km/h) |
| 40 mph (64.37 km/h) | 42.26 mph (68 km/h) |
| 45 mph (72.42 km/h) | 47.54 mph (76.5 km/h) |
| 50 mph (80.47 km/h) | 52.82 mph (85 km/h) |
| 55 mph (88.51 km/h) | 58.1 mph (93.5 km/h) |
| 60 mph (96.56 km/h) | 63.38 mph (102.01 km/h) |
| 65 mph (104.61 km/h) | 68.66 mph (110.51 km/h) |
| 70 mph (112.65 km/h) | 73.95 mph (119.01 km/h) |
| 75 mph (120.7 km/h) | 79.23 mph (127.51 km/h) |
| 80 mph (128.75 km/h) | 84.51 mph (136.01 km/h) |
| 85 mph (136.79 km/h) | 89.79 mph (144.51 km/h) |
| 90 mph (144.84 km/h) | 95.07 mph (153.01 km/h) |
| 95 mph (152.89 km/h) | 100.36 mph (161.51 km/h) |
| 100 mph (160.93 km/h) | 105.64 mph (170.01 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1370 | 1591 | 1714 | 1789 | 1871 | 1929 | 1993 | 2069 | 2174 | 2279 | 2395 | 2489 | 2658 | 2844 | 2990 | 3083 | 3136 | 3328 | 3596 | 4179 |
Better Fuel Economy Factory Ratios Increased Power
