Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/25-19 | 315/20-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25 (635.1) | 24.96 (634) | -0.04 (-1.1) -0.2% |
| Width inches (mm) | 12.01 (305) | 12.4 (315) | 0.39 (10) 3.3% |
| Circum. inches (mm) | 78.55 (1995.23) | 78.42 (1991.77) | -0.14 (-3.46) -0.2% |
| Sidewall Height inches (mm) | 3 (76.25) | 2.48 (63) | -0.52 (-13.25) -17.4% |
| Revolutions per mile (km) | 806.6 (501.2) | 808 (502.07) | 1.4 (0.87) 0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.97 mph (32.13 km/h) |
| 25 mph (40.23 km/h) | 24.96 mph (40.16 km/h) |
| 30 mph (48.28 km/h) | 29.95 mph (48.2 km/h) |
| 35 mph (56.33 km/h) | 34.94 mph (56.23 km/h) |
| 40 mph (64.37 km/h) | 39.93 mph (64.26 km/h) |
| 45 mph (72.42 km/h) | 44.92 mph (72.3 km/h) |
| 50 mph (80.47 km/h) | 49.91 mph (80.33 km/h) |
| 55 mph (88.51 km/h) | 54.9 mph (88.36 km/h) |
| 60 mph (96.56 km/h) | 59.9 mph (96.39 km/h) |
| 65 mph (104.61 km/h) | 64.89 mph (104.43 km/h) |
| 70 mph (112.65 km/h) | 69.88 mph (112.46 km/h) |
| 75 mph (120.7 km/h) | 74.87 mph (120.49 km/h) |
| 80 mph (128.75 km/h) | 79.86 mph (128.52 km/h) |
| 85 mph (136.79 km/h) | 84.85 mph (136.56 km/h) |
| 90 mph (144.84 km/h) | 89.84 mph (144.59 km/h) |
| 95 mph (152.89 km/h) | 94.84 mph (152.62 km/h) |
| 100 mph (160.93 km/h) | 99.83 mph (160.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2056 | 2389 | 2572 | 2686 | 2809 | 2896 | 2992 | 3106 | 3264 | 3421 | 3596 | 3736 | 3990 | 4270 | 4489 | 4629 | 4707 | 4996 | 5399 | 6274 |
Better Fuel Economy Factory Ratios Increased Power
