Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 345/20-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 27.43 (696.8) | -0.72 (-18.2) -2.5% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 88.43 (2246.24) | 86.18 (2189.06) | -2.25 (-57.18) -2.5% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 2.72 (69) | -1.36 (-34.5) -33.3% |
| Revolutions per mile (km) | 716.46 (445.19) | 735.18 (456.82) | 18.71 (11.63) 2.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.49 mph (31.37 km/h) |
| 25 mph (40.23 km/h) | 24.36 mph (39.21 km/h) |
| 30 mph (48.28 km/h) | 29.24 mph (47.05 km/h) |
| 35 mph (56.33 km/h) | 34.11 mph (54.89 km/h) |
| 40 mph (64.37 km/h) | 38.98 mph (62.74 km/h) |
| 45 mph (72.42 km/h) | 43.85 mph (70.58 km/h) |
| 50 mph (80.47 km/h) | 48.73 mph (78.42 km/h) |
| 55 mph (88.51 km/h) | 53.6 mph (86.26 km/h) |
| 60 mph (96.56 km/h) | 58.47 mph (94.1 km/h) |
| 65 mph (104.61 km/h) | 63.35 mph (101.94 km/h) |
| 70 mph (112.65 km/h) | 68.22 mph (109.79 km/h) |
| 75 mph (120.7 km/h) | 73.09 mph (117.63 km/h) |
| 80 mph (128.75 km/h) | 77.96 mph (125.47 km/h) |
| 85 mph (136.79 km/h) | 82.84 mph (133.31 km/h) |
| 90 mph (144.84 km/h) | 87.71 mph (141.15 km/h) |
| 95 mph (152.89 km/h) | 92.58 mph (149 km/h) |
| 100 mph (160.93 km/h) | 97.45 mph (156.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1871 | 2173 | 2341 | 2444 | 2556 | 2635 | 2723 | 2826 | 2970 | 3113 | 3272 | 3399 | 3630 | 3885 | 4084 | 4211 | 4283 | 4546 | 4912 | 5708 |
Better Fuel Economy Factory Ratios Increased Power
