Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 33/13.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 33.1 (840.62) | -4.9 (-124.42) -12.9% |
| Width inches (mm) | 15.51 (394) | 13.5 (343) | -2.01 (-51) -12.9% |
| Circum. inches (mm) | 119.36 (3031.76) | 103.97 (2640.89) | -15.39 (-390.88) -12.9% |
| Sidewall Height inches (mm) | 9 (228.52) | 9.05 (229.81) | 0.05 (1.29) 0.6% |
| Revolutions per mile (km) | 530.83 (329.84) | 609.4 (378.66) | 78.57 (48.82) 14.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.42 mph (28.04 km/h) |
| 25 mph (40.23 km/h) | 21.78 mph (35.05 km/h) |
| 30 mph (48.28 km/h) | 26.13 mph (42.06 km/h) |
| 35 mph (56.33 km/h) | 30.49 mph (49.07 km/h) |
| 40 mph (64.37 km/h) | 34.84 mph (56.07 km/h) |
| 45 mph (72.42 km/h) | 39.2 mph (63.08 km/h) |
| 50 mph (80.47 km/h) | 43.55 mph (70.09 km/h) |
| 55 mph (88.51 km/h) | 47.91 mph (77.1 km/h) |
| 60 mph (96.56 km/h) | 52.26 mph (84.11 km/h) |
| 65 mph (104.61 km/h) | 56.62 mph (91.12 km/h) |
| 70 mph (112.65 km/h) | 60.98 mph (98.13 km/h) |
| 75 mph (120.7 km/h) | 65.33 mph (105.14 km/h) |
| 80 mph (128.75 km/h) | 69.69 mph (112.15 km/h) |
| 85 mph (136.79 km/h) | 74.04 mph (119.16 km/h) |
| 90 mph (144.84 km/h) | 78.4 mph (126.17 km/h) |
| 95 mph (152.89 km/h) | 82.75 mph (133.18 km/h) |
| 100 mph (160.93 km/h) | 87.11 mph (140.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1551 | 1802 | 1940 | 2026 | 2118 | 2184 | 2257 | 2343 | 2461 | 2580 | 2712 | 2818 | 3009 | 3220 | 3385 | 3491 | 3550 | 3768 | 4072 | 4732 |
Better Fuel Economy Factory Ratios Increased Power
