Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/75-15 | 31/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.47 (748.5) | 30.94 (785.88) | 1.47 (37.38) 5% |
| Width inches (mm) | 9.65 (245) | 9.49 (241) | -0.16 (-4) -1.6% |
| Circum. inches (mm) | 92.58 (2351.48) | 97.2 (2468.91) | 4.62 (117.43) 5% |
| Sidewall Height inches (mm) | 7.23 (183.75) | 7.97 (202.44) | 0.74 (18.69) 10.2% |
| Revolutions per mile (km) | 684.4 (425.26) | 651.84 (405.04) | -32.55 (-20.23) -4.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21 mph (33.79 km/h) |
| 25 mph (40.23 km/h) | 26.25 mph (42.24 km/h) |
| 30 mph (48.28 km/h) | 31.5 mph (50.69 km/h) |
| 35 mph (56.33 km/h) | 36.75 mph (59.14 km/h) |
| 40 mph (64.37 km/h) | 42 mph (67.59 km/h) |
| 45 mph (72.42 km/h) | 47.25 mph (76.04 km/h) |
| 50 mph (80.47 km/h) | 52.5 mph (84.49 km/h) |
| 55 mph (88.51 km/h) | 57.75 mph (92.93 km/h) |
| 60 mph (96.56 km/h) | 63 mph (101.38 km/h) |
| 65 mph (104.61 km/h) | 68.25 mph (109.83 km/h) |
| 70 mph (112.65 km/h) | 73.5 mph (118.28 km/h) |
| 75 mph (120.7 km/h) | 78.75 mph (126.73 km/h) |
| 80 mph (128.75 km/h) | 84 mph (135.18 km/h) |
| 85 mph (136.79 km/h) | 89.24 mph (143.63 km/h) |
| 90 mph (144.84 km/h) | 94.49 mph (152.07 km/h) |
| 95 mph (152.89 km/h) | 99.74 mph (160.52 km/h) |
| 100 mph (160.93 km/h) | 104.99 mph (168.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1659 | 1927 | 2075 | 2167 | 2266 | 2336 | 2414 | 2506 | 2633 | 2760 | 2901 | 3014 | 3219 | 3445 | 3621 | 3734 | 3798 | 4031 | 4355 | 5061 |
Better Fuel Economy Factory Ratios Increased Power
