Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/75-16 | 39/13.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.56 (953.9) | 38.88 (987.46) | 1.32 (33.56) 3.5% |
| Width inches (mm) | 14.37 (365) | 13.5 (343) | -0.87 (-22) -6% |
| Circum. inches (mm) | 117.98 (2996.77) | 122.13 (3102.2) | 4.15 (105.43) 3.5% |
| Sidewall Height inches (mm) | 10.78 (273.75) | 10.94 (277.83) | 0.16 (4.08) 1.5% |
| Revolutions per mile (km) | 537.03 (333.69) | 518.78 (322.35) | -18.25 (-11.34) -3.4% |
39/13.5-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.7 mph (33.32 km/h) |
| 25 mph (40.23 km/h) | 25.88 mph (41.65 km/h) |
| 30 mph (48.28 km/h) | 31.06 mph (49.98 km/h) |
| 35 mph (56.33 km/h) | 36.23 mph (58.31 km/h) |
| 40 mph (64.37 km/h) | 41.41 mph (66.64 km/h) |
| 45 mph (72.42 km/h) | 46.58 mph (74.97 km/h) |
| 50 mph (80.47 km/h) | 51.76 mph (83.3 km/h) |
| 55 mph (88.51 km/h) | 56.94 mph (91.63 km/h) |
| 60 mph (96.56 km/h) | 62.11 mph (99.96 km/h) |
| 65 mph (104.61 km/h) | 67.29 mph (108.29 km/h) |
| 70 mph (112.65 km/h) | 72.46 mph (116.62 km/h) |
| 75 mph (120.7 km/h) | 77.64 mph (124.95 km/h) |
| 80 mph (128.75 km/h) | 82.81 mph (133.28 km/h) |
| 85 mph (136.79 km/h) | 87.99 mph (141.61 km/h) |
| 90 mph (144.84 km/h) | 93.17 mph (149.94 km/h) |
| 95 mph (152.89 km/h) | 98.34 mph (158.27 km/h) |
| 100 mph (160.93 km/h) | 103.52 mph (166.6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1320 | 1534 | 1652 | 1725 | 1803 | 1859 | 1921 | 1994 | 2095 | 2197 | 2309 | 2399 | 2562 | 2741 | 2882 | 2972 | 3022 | 3208 | 3466 | 4028 |
Better Fuel Economy Factory Ratios Increased Power
