Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-19 | 315/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.44 (671.6) | 28.92 (734.6) | 2.48 (63) 9.4% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 83.07 (2109.89) | 90.86 (2307.81) | 7.79 (197.92) 9.4% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4.96 (126) | 1.24 (31.5) 33.3% |
| Revolutions per mile (km) | 762.76 (473.96) | 697.35 (433.31) | -65.42 (-40.65) -8.6% |
315/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.88 mph (35.21 km/h) |
| 25 mph (40.23 km/h) | 27.35 mph (44.01 km/h) |
| 30 mph (48.28 km/h) | 32.81 mph (52.81 km/h) |
| 35 mph (56.33 km/h) | 38.28 mph (61.61 km/h) |
| 40 mph (64.37 km/h) | 43.75 mph (70.41 km/h) |
| 45 mph (72.42 km/h) | 49.22 mph (79.21 km/h) |
| 50 mph (80.47 km/h) | 54.69 mph (88.02 km/h) |
| 55 mph (88.51 km/h) | 60.16 mph (96.82 km/h) |
| 60 mph (96.56 km/h) | 65.63 mph (105.62 km/h) |
| 65 mph (104.61 km/h) | 71.1 mph (114.42 km/h) |
| 70 mph (112.65 km/h) | 76.57 mph (123.22 km/h) |
| 75 mph (120.7 km/h) | 82.04 mph (132.02 km/h) |
| 80 mph (128.75 km/h) | 87.5 mph (140.83 km/h) |
| 85 mph (136.79 km/h) | 92.97 mph (149.63 km/h) |
| 90 mph (144.84 km/h) | 98.44 mph (158.43 km/h) |
| 95 mph (152.89 km/h) | 103.91 mph (167.23 km/h) |
| 100 mph (160.93 km/h) | 109.38 mph (176.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1775 | 2062 | 2220 | 2318 | 2424 | 2500 | 2583 | 2681 | 2817 | 2953 | 3104 | 3225 | 3444 | 3685 | 3874 | 3995 | 4063 | 4312 | 4659 | 5414 |
Better Fuel Economy Factory Ratios Increased Power
