Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/30-20 | 315/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.68 (703) | 28.68 (728.5) | 1 (25.5) 3.6% |
| Width inches (mm) | 12.8 (325) | 12.4 (315) | -0.39 (-10) -3.1% |
| Circum. inches (mm) | 86.95 (2208.54) | 90.1 (2288.65) | 3.15 (80.11) 3.6% |
| Sidewall Height inches (mm) | 3.84 (97.5) | 4.34 (110.25) | 0.5 (12.75) 13.1% |
| Revolutions per mile (km) | 728.69 (452.79) | 703.18 (436.94) | -25.51 (-15.85) -3.5% |
315/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.73 mph (33.35 km/h) |
| 25 mph (40.23 km/h) | 25.91 mph (41.69 km/h) |
| 30 mph (48.28 km/h) | 31.09 mph (50.03 km/h) |
| 35 mph (56.33 km/h) | 36.27 mph (58.37 km/h) |
| 40 mph (64.37 km/h) | 41.45 mph (66.71 km/h) |
| 45 mph (72.42 km/h) | 46.63 mph (75.05 km/h) |
| 50 mph (80.47 km/h) | 51.81 mph (83.39 km/h) |
| 55 mph (88.51 km/h) | 57 mph (91.72 km/h) |
| 60 mph (96.56 km/h) | 62.18 mph (100.06 km/h) |
| 65 mph (104.61 km/h) | 67.36 mph (108.4 km/h) |
| 70 mph (112.65 km/h) | 72.54 mph (116.74 km/h) |
| 75 mph (120.7 km/h) | 77.72 mph (125.08 km/h) |
| 80 mph (128.75 km/h) | 82.9 mph (133.42 km/h) |
| 85 mph (136.79 km/h) | 88.08 mph (141.76 km/h) |
| 90 mph (144.84 km/h) | 93.26 mph (150.1 km/h) |
| 95 mph (152.89 km/h) | 98.45 mph (158.43 km/h) |
| 100 mph (160.93 km/h) | 103.63 mph (166.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1789 | 2079 | 2239 | 2338 | 2444 | 2520 | 2604 | 2703 | 2840 | 2977 | 3130 | 3252 | 3472 | 3716 | 3906 | 4028 | 4097 | 4348 | 4698 | 5460 |
Better Fuel Economy Factory Ratios Increased Power
