Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/65-15 | 31/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.56 (725.5) | 30.94 (785.88) | 2.38 (60.38) 8.3% |
| Width inches (mm) | 10.43 (265) | 9.49 (241) | -0.94 (-24) -9.1% |
| Circum. inches (mm) | 89.73 (2279.23) | 97.2 (2468.91) | 7.47 (189.69) 8.3% |
| Sidewall Height inches (mm) | 6.78 (172.25) | 7.97 (202.44) | 1.19 (30.19) 17.5% |
| Revolutions per mile (km) | 706.09 (438.74) | 651.84 (405.04) | -54.25 (-33.71) -7.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.66 mph (34.87 km/h) |
| 25 mph (40.23 km/h) | 27.08 mph (43.58 km/h) |
| 30 mph (48.28 km/h) | 32.5 mph (52.3 km/h) |
| 35 mph (56.33 km/h) | 37.91 mph (61.01 km/h) |
| 40 mph (64.37 km/h) | 43.33 mph (69.73 km/h) |
| 45 mph (72.42 km/h) | 48.75 mph (78.45 km/h) |
| 50 mph (80.47 km/h) | 54.16 mph (87.16 km/h) |
| 55 mph (88.51 km/h) | 59.58 mph (95.88 km/h) |
| 60 mph (96.56 km/h) | 64.99 mph (104.6 km/h) |
| 65 mph (104.61 km/h) | 70.41 mph (113.31 km/h) |
| 70 mph (112.65 km/h) | 75.83 mph (122.03 km/h) |
| 75 mph (120.7 km/h) | 81.24 mph (130.75 km/h) |
| 80 mph (128.75 km/h) | 86.66 mph (139.46 km/h) |
| 85 mph (136.79 km/h) | 92.07 mph (148.18 km/h) |
| 90 mph (144.84 km/h) | 97.49 mph (156.9 km/h) |
| 95 mph (152.89 km/h) | 102.91 mph (165.61 km/h) |
| 100 mph (160.93 km/h) | 108.32 mph (174.33 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
