Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/40-19 | 30/10-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.92 (734.6) | 30 (762) | 1.08 (27.4) 3.7% |
| Width inches (mm) | 12.4 (315) | 10 (254) | -2.4 (-61) -19.4% |
| Circum. inches (mm) | 90.86 (2307.81) | 94.25 (2393.89) | 3.39 (86.08) 3.7% |
| Sidewall Height inches (mm) | 4.96 (126) | 5 (127) | 0.04 (1) 0.8% |
| Revolutions per mile (km) | 697.35 (433.31) | 672.27 (417.73) | -25.08 (-15.58) -3.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.75 mph (33.39 km/h) |
| 25 mph (40.23 km/h) | 25.93 mph (41.73 km/h) |
| 30 mph (48.28 km/h) | 31.12 mph (50.08 km/h) |
| 35 mph (56.33 km/h) | 36.31 mph (58.43 km/h) |
| 40 mph (64.37 km/h) | 41.49 mph (66.77 km/h) |
| 45 mph (72.42 km/h) | 46.68 mph (75.12 km/h) |
| 50 mph (80.47 km/h) | 51.86 mph (83.47 km/h) |
| 55 mph (88.51 km/h) | 57.05 mph (91.82 km/h) |
| 60 mph (96.56 km/h) | 62.24 mph (100.16 km/h) |
| 65 mph (104.61 km/h) | 67.42 mph (108.51 km/h) |
| 70 mph (112.65 km/h) | 72.61 mph (116.86 km/h) |
| 75 mph (120.7 km/h) | 77.8 mph (125.2 km/h) |
| 80 mph (128.75 km/h) | 82.98 mph (133.55 km/h) |
| 85 mph (136.79 km/h) | 88.17 mph (141.9 km/h) |
| 90 mph (144.84 km/h) | 93.36 mph (150.24 km/h) |
| 95 mph (152.89 km/h) | 98.54 mph (158.59 km/h) |
| 100 mph (160.93 km/h) | 103.73 mph (166.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 | 1987 | 2140 | 2235 | 2337 | 2410 | 2490 | 2584 | 2715 | 2846 | 2992 | 3109 | 3320 | 3553 | 3735 | 3851 | 3917 | 4157 | 4492 | 5220 |
Better Fuel Economy Factory Ratios Increased Power
