Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 365/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 37.24 (946) | 9.09 (231) 32.3% |
| Width inches (mm) | 13.58 (345) | 14.37 (365) | 0.79 (20) 5.8% |
| Circum. inches (mm) | 88.43 (2246.24) | 117.01 (2971.95) | 28.57 (725.71) 32.3% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 8.62 (219) | 4.55 (115.5) 111.6% |
| Revolutions per mile (km) | 716.46 (445.19) | 541.51 (336.48) | -174.95 (-108.71) -24.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.46 mph (42.59 km/h) |
| 25 mph (40.23 km/h) | 33.08 mph (53.23 km/h) |
| 30 mph (48.28 km/h) | 39.69 mph (63.88 km/h) |
| 35 mph (56.33 km/h) | 46.31 mph (74.53 km/h) |
| 40 mph (64.37 km/h) | 52.92 mph (85.17 km/h) |
| 45 mph (72.42 km/h) | 59.54 mph (95.82 km/h) |
| 50 mph (80.47 km/h) | 66.15 mph (106.46 km/h) |
| 55 mph (88.51 km/h) | 72.77 mph (117.11 km/h) |
| 60 mph (96.56 km/h) | 79.38 mph (127.76 km/h) |
| 65 mph (104.61 km/h) | 86 mph (138.4 km/h) |
| 70 mph (112.65 km/h) | 92.62 mph (149.05 km/h) |
| 75 mph (120.7 km/h) | 99.23 mph (159.7 km/h) |
| 80 mph (128.75 km/h) | 105.85 mph (170.34 km/h) |
| 85 mph (136.79 km/h) | 112.46 mph (180.99 km/h) |
| 90 mph (144.84 km/h) | 119.08 mph (191.64 km/h) |
| 95 mph (152.89 km/h) | 125.69 mph (202.28 km/h) |
| 100 mph (160.93 km/h) | 132.31 mph (212.93 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1378 | 1601 | 1724 | 1800 | 1882 | 1941 | 2005 | 2082 | 2187 | 2293 | 2410 | 2504 | 2674 | 2862 | 3008 | 3102 | 3155 | 3348 | 3618 | 4205 |
Better Fuel Economy Factory Ratios Increased Power
