Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-20 | 315/20-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 24.96 (634) | -1.24 (-31.5) -4.7% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 82.31 (2090.73) | 78.42 (1991.77) | -3.9 (-98.96) -4.7% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 2.48 (63) | -0.62 (-15.75) -20% |
| Revolutions per mile (km) | 769.75 (478.3) | 808 (502.07) | 38.24 (23.76) 5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.05 mph (30.66 km/h) |
| 25 mph (40.23 km/h) | 23.82 mph (38.33 km/h) |
| 30 mph (48.28 km/h) | 28.58 mph (46 km/h) |
| 35 mph (56.33 km/h) | 33.34 mph (53.66 km/h) |
| 40 mph (64.37 km/h) | 38.11 mph (61.33 km/h) |
| 45 mph (72.42 km/h) | 42.87 mph (68.99 km/h) |
| 50 mph (80.47 km/h) | 47.63 mph (76.66 km/h) |
| 55 mph (88.51 km/h) | 52.4 mph (84.32 km/h) |
| 60 mph (96.56 km/h) | 57.16 mph (91.99 km/h) |
| 65 mph (104.61 km/h) | 61.92 mph (99.66 km/h) |
| 70 mph (112.65 km/h) | 66.69 mph (107.32 km/h) |
| 75 mph (120.7 km/h) | 71.45 mph (114.99 km/h) |
| 80 mph (128.75 km/h) | 76.21 mph (122.65 km/h) |
| 85 mph (136.79 km/h) | 80.98 mph (130.32 km/h) |
| 90 mph (144.84 km/h) | 85.74 mph (137.99 km/h) |
| 95 mph (152.89 km/h) | 90.5 mph (145.65 km/h) |
| 100 mph (160.93 km/h) | 95.27 mph (153.32 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
