Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 345/75-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 37.37 (949.3) | 9.22 (234.3) 32.8% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 88.43 (2246.24) | 117.41 (2982.31) | 28.98 (736.08) 32.8% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 10.19 (258.75) | 6.11 (155.25) 150% |
| Revolutions per mile (km) | 716.46 (445.19) | 539.63 (335.31) | -176.83 (-109.88) -24.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.55 mph (42.73 km/h) |
| 25 mph (40.23 km/h) | 33.19 mph (53.42 km/h) |
| 30 mph (48.28 km/h) | 39.83 mph (64.1 km/h) |
| 35 mph (56.33 km/h) | 46.47 mph (74.79 km/h) |
| 40 mph (64.37 km/h) | 53.11 mph (85.47 km/h) |
| 45 mph (72.42 km/h) | 59.75 mph (96.15 km/h) |
| 50 mph (80.47 km/h) | 66.38 mph (106.84 km/h) |
| 55 mph (88.51 km/h) | 73.02 mph (117.52 km/h) |
| 60 mph (96.56 km/h) | 79.66 mph (128.2 km/h) |
| 65 mph (104.61 km/h) | 86.3 mph (138.89 km/h) |
| 70 mph (112.65 km/h) | 92.94 mph (149.57 km/h) |
| 75 mph (120.7 km/h) | 99.58 mph (160.25 km/h) |
| 80 mph (128.75 km/h) | 106.22 mph (170.94 km/h) |
| 85 mph (136.79 km/h) | 112.85 mph (181.62 km/h) |
| 90 mph (144.84 km/h) | 119.49 mph (192.3 km/h) |
| 95 mph (152.89 km/h) | 126.13 mph (202.99 km/h) |
| 100 mph (160.93 km/h) | 132.77 mph (213.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1373 | 1595 | 1718 | 1794 | 1876 | 1934 | 1999 | 2074 | 2180 | 2285 | 2402 | 2495 | 2665 | 2852 | 2998 | 3091 | 3144 | 3337 | 3606 | 4190 |
Better Fuel Economy Factory Ratios Increased Power
