Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/40-19 | 315/30-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.92 (734.6) | 26.44 (671.6) | -2.48 (-63) -8.6% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 90.86 (2307.81) | 83.07 (2109.89) | -7.79 (-197.92) -8.6% |
| Sidewall Height inches (mm) | 4.96 (126) | 3.72 (94.5) | -1.24 (-31.5) -25% |
| Revolutions per mile (km) | 697.35 (433.31) | 762.76 (473.96) | 65.42 (40.65) 9.4% |
315/30-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.28 mph (29.43 km/h) |
| 25 mph (40.23 km/h) | 22.86 mph (36.78 km/h) |
| 30 mph (48.28 km/h) | 27.43 mph (44.14 km/h) |
| 35 mph (56.33 km/h) | 32 mph (51.5 km/h) |
| 40 mph (64.37 km/h) | 36.57 mph (58.85 km/h) |
| 45 mph (72.42 km/h) | 41.14 mph (66.21 km/h) |
| 50 mph (80.47 km/h) | 45.71 mph (73.57 km/h) |
| 55 mph (88.51 km/h) | 50.28 mph (80.92 km/h) |
| 60 mph (96.56 km/h) | 54.85 mph (88.28 km/h) |
| 65 mph (104.61 km/h) | 59.43 mph (95.64 km/h) |
| 70 mph (112.65 km/h) | 64 mph (102.99 km/h) |
| 75 mph (120.7 km/h) | 68.57 mph (110.35 km/h) |
| 80 mph (128.75 km/h) | 73.14 mph (117.71 km/h) |
| 85 mph (136.79 km/h) | 77.71 mph (125.06 km/h) |
| 90 mph (144.84 km/h) | 82.28 mph (132.42 km/h) |
| 95 mph (152.89 km/h) | 86.85 mph (139.78 km/h) |
| 100 mph (160.93 km/h) | 91.42 mph (147.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1941 | 2255 | 2428 | 2536 | 2651 | 2734 | 2825 | 2932 | 3081 | 3230 | 3395 | 3527 | 3767 | 4031 | 4237 | 4369 | 4444 | 4716 | 5096 | 5922 |
Better Fuel Economy Factory Ratios Increased Power
