Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 345/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 36.02 (914.8) | 7.87 (199.8) 27.9% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 88.43 (2246.24) | 113.15 (2873.93) | 24.71 (627.69) 27.9% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 9.51 (241.5) | 5.43 (138) 133.3% |
| Revolutions per mile (km) | 716.46 (445.19) | 559.98 (347.96) | -156.48 (-97.23) -21.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.59 mph (41.18 km/h) |
| 25 mph (40.23 km/h) | 31.99 mph (51.48 km/h) |
| 30 mph (48.28 km/h) | 38.38 mph (61.77 km/h) |
| 35 mph (56.33 km/h) | 44.78 mph (72.07 km/h) |
| 40 mph (64.37 km/h) | 51.18 mph (82.36 km/h) |
| 45 mph (72.42 km/h) | 57.57 mph (92.66 km/h) |
| 50 mph (80.47 km/h) | 63.97 mph (102.95 km/h) |
| 55 mph (88.51 km/h) | 70.37 mph (113.25 km/h) |
| 60 mph (96.56 km/h) | 76.77 mph (123.54 km/h) |
| 65 mph (104.61 km/h) | 83.16 mph (133.84 km/h) |
| 70 mph (112.65 km/h) | 89.56 mph (144.13 km/h) |
| 75 mph (120.7 km/h) | 95.96 mph (154.43 km/h) |
| 80 mph (128.75 km/h) | 102.36 mph (164.73 km/h) |
| 85 mph (136.79 km/h) | 108.75 mph (175.02 km/h) |
| 90 mph (144.84 km/h) | 115.15 mph (185.32 km/h) |
| 95 mph (152.89 km/h) | 121.55 mph (195.61 km/h) |
| 100 mph (160.93 km/h) | 127.94 mph (205.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1425 | 1655 | 1783 | 1862 | 1947 | 2007 | 2074 | 2153 | 2262 | 2371 | 2492 | 2589 | 2765 | 2959 | 3111 | 3208 | 3262 | 3463 | 3741 | 4348 |
Better Fuel Economy Factory Ratios Increased Power
