Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 32/13.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 32.01 (813.18) | 1.66 (42.18) 5.5% |
| Width inches (mm) | 12.8 (325) | 13.5 (343) | 0.71 (18) 5.5% |
| Circum. inches (mm) | 95.36 (2422.17) | 100.58 (2554.68) | 5.22 (132.51) 5.5% |
| Sidewall Height inches (mm) | 7.68 (195) | 8.51 (216.09) | 0.83 (21.09) 10.8% |
| Revolutions per mile (km) | 664.42 (412.85) | 629.96 (391.44) | -34.46 (-21.41) -5.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.09 mph (33.95 km/h) |
| 25 mph (40.23 km/h) | 26.37 mph (42.43 km/h) |
| 30 mph (48.28 km/h) | 31.64 mph (50.92 km/h) |
| 35 mph (56.33 km/h) | 36.91 mph (59.41 km/h) |
| 40 mph (64.37 km/h) | 42.19 mph (67.9 km/h) |
| 45 mph (72.42 km/h) | 47.46 mph (76.38 km/h) |
| 50 mph (80.47 km/h) | 52.74 mph (84.87 km/h) |
| 55 mph (88.51 km/h) | 58.01 mph (93.36 km/h) |
| 60 mph (96.56 km/h) | 63.28 mph (101.84 km/h) |
| 65 mph (104.61 km/h) | 68.56 mph (110.33 km/h) |
| 70 mph (112.65 km/h) | 73.83 mph (118.82 km/h) |
| 75 mph (120.7 km/h) | 79.1 mph (127.3 km/h) |
| 80 mph (128.75 km/h) | 84.38 mph (135.79 km/h) |
| 85 mph (136.79 km/h) | 89.65 mph (144.28 km/h) |
| 90 mph (144.84 km/h) | 94.92 mph (152.77 km/h) |
| 95 mph (152.89 km/h) | 100.2 mph (161.25 km/h) |
| 100 mph (160.93 km/h) | 105.47 mph (169.74 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1603 | 1862 | 2006 | 2094 | 2190 | 2258 | 2333 | 2422 | 2545 | 2667 | 2804 | 2913 | 3111 | 3329 | 3500 | 3609 | 3670 | 3895 | 4209 | 4891 |
Better Fuel Economy Factory Ratios Increased Power
