Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/65-16 | 38/12.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.68 (880.9) | 38.03 (966.08) | 3.35 (85.18) 9.7% |
| Width inches (mm) | 14.37 (365) | 12.52 (318) | -1.85 (-47) -12.9% |
| Circum. inches (mm) | 108.95 (2767.43) | 119.49 (3035.03) | 10.54 (267.6) 9.7% |
| Sidewall Height inches (mm) | 9.34 (237.25) | 11.02 (279.84) | 1.68 (42.59) 18% |
| Revolutions per mile (km) | 581.53 (361.35) | 530.26 (329.49) | -51.27 (-31.86) -8.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.93 mph (35.3 km/h) |
| 25 mph (40.23 km/h) | 27.42 mph (44.12 km/h) |
| 30 mph (48.28 km/h) | 32.9 mph (52.95 km/h) |
| 35 mph (56.33 km/h) | 38.38 mph (61.77 km/h) |
| 40 mph (64.37 km/h) | 43.87 mph (70.6 km/h) |
| 45 mph (72.42 km/h) | 49.35 mph (79.42 km/h) |
| 50 mph (80.47 km/h) | 54.83 mph (88.25 km/h) |
| 55 mph (88.51 km/h) | 60.32 mph (97.07 km/h) |
| 60 mph (96.56 km/h) | 65.8 mph (105.9 km/h) |
| 65 mph (104.61 km/h) | 71.29 mph (114.72 km/h) |
| 70 mph (112.65 km/h) | 76.77 mph (123.55 km/h) |
| 75 mph (120.7 km/h) | 82.25 mph (132.37 km/h) |
| 80 mph (128.75 km/h) | 87.74 mph (141.2 km/h) |
| 85 mph (136.79 km/h) | 93.22 mph (150.02 km/h) |
| 90 mph (144.84 km/h) | 98.7 mph (158.85 km/h) |
| 95 mph (152.89 km/h) | 104.19 mph (167.67 km/h) |
| 100 mph (160.93 km/h) | 109.67 mph (176.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1349 | 1568 | 1688 | 1763 | 1843 | 1901 | 1964 | 2038 | 2142 | 2245 | 2360 | 2452 | 2618 | 2802 | 2946 | 3038 | 3089 | 3279 | 3543 | 4117 |
Better Fuel Economy Factory Ratios Increased Power
