Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-20 | 375/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 30.33 (770.5) | 4.13 (105) 15.8% |
| Width inches (mm) | 12.4 (315) | 14.76 (375) | 2.36 (60) 19% |
| Circum. inches (mm) | 82.31 (2090.73) | 95.3 (2420.6) | 12.99 (329.87) 15.8% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 5.17 (131.25) | 2.07 (52.5) 66.7% |
| Revolutions per mile (km) | 769.75 (478.3) | 664.85 (413.12) | -104.9 (-65.18) -13.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.16 mph (37.27 km/h) |
| 25 mph (40.23 km/h) | 28.94 mph (46.58 km/h) |
| 30 mph (48.28 km/h) | 34.73 mph (55.9 km/h) |
| 35 mph (56.33 km/h) | 40.52 mph (65.21 km/h) |
| 40 mph (64.37 km/h) | 46.31 mph (74.53 km/h) |
| 45 mph (72.42 km/h) | 52.1 mph (83.85 km/h) |
| 50 mph (80.47 km/h) | 57.89 mph (93.16 km/h) |
| 55 mph (88.51 km/h) | 63.68 mph (102.48 km/h) |
| 60 mph (96.56 km/h) | 69.47 mph (111.8 km/h) |
| 65 mph (104.61 km/h) | 75.26 mph (121.11 km/h) |
| 70 mph (112.65 km/h) | 81.04 mph (130.43 km/h) |
| 75 mph (120.7 km/h) | 86.83 mph (139.74 km/h) |
| 80 mph (128.75 km/h) | 92.62 mph (149.06 km/h) |
| 85 mph (136.79 km/h) | 98.41 mph (158.38 km/h) |
| 90 mph (144.84 km/h) | 104.2 mph (167.69 km/h) |
| 95 mph (152.89 km/h) | 109.99 mph (177.01 km/h) |
| 100 mph (160.93 km/h) | 115.78 mph (186.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1692 | 1966 | 2117 | 2210 | 2311 | 2383 | 2462 | 2556 | 2685 | 2815 | 2959 | 3074 | 3283 | 3513 | 3693 | 3809 | 3873 | 4111 | 4442 | 5162 |
Better Fuel Economy Factory Ratios Increased Power
