Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 300/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 34.17 (868) | -3.82 (-97.04) -10.1% |
| Width inches (mm) | 15.51 (394) | 11.81 (300) | -3.7 (-94) -23.9% |
| Circum. inches (mm) | 119.36 (3031.76) | 107.36 (2726.9) | -12 (-304.86) -10.1% |
| Sidewall Height inches (mm) | 9 (228.52) | 7.09 (180) | -1.91 (-48.52) -21.2% |
| Revolutions per mile (km) | 530.83 (329.84) | 590.17 (366.72) | 59.35 (36.88) 11.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.99 mph (28.95 km/h) |
| 25 mph (40.23 km/h) | 22.49 mph (36.19 km/h) |
| 30 mph (48.28 km/h) | 26.98 mph (43.43 km/h) |
| 35 mph (56.33 km/h) | 31.48 mph (50.66 km/h) |
| 40 mph (64.37 km/h) | 35.98 mph (57.9 km/h) |
| 45 mph (72.42 km/h) | 40.48 mph (65.14 km/h) |
| 50 mph (80.47 km/h) | 44.97 mph (72.38 km/h) |
| 55 mph (88.51 km/h) | 49.47 mph (79.61 km/h) |
| 60 mph (96.56 km/h) | 53.97 mph (86.85 km/h) |
| 65 mph (104.61 km/h) | 58.46 mph (94.09 km/h) |
| 70 mph (112.65 km/h) | 62.96 mph (101.33 km/h) |
| 75 mph (120.7 km/h) | 67.46 mph (108.56 km/h) |
| 80 mph (128.75 km/h) | 71.96 mph (115.8 km/h) |
| 85 mph (136.79 km/h) | 76.45 mph (123.04 km/h) |
| 90 mph (144.84 km/h) | 80.95 mph (130.28 km/h) |
| 95 mph (152.89 km/h) | 85.45 mph (137.51 km/h) |
| 100 mph (160.93 km/h) | 89.94 mph (144.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1502 | 1745 | 1879 | 1962 | 2052 | 2115 | 2186 | 2269 | 2384 | 2499 | 2627 | 2729 | 2914 | 3119 | 3279 | 3381 | 3438 | 3649 | 3943 | 4582 |
Better Fuel Economy Factory Ratios Increased Power
