Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.07 (738.5) | 30.98 (786.84) | 1.9 (48.34) 6.5% |
| Width inches (mm) | 10.83 (275) | 10.51 (267) | -0.31 (-8) -2.9% |
| Circum. inches (mm) | 91.34 (2320.07) | 97.32 (2471.93) | 5.98 (151.86) 6.5% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 7.99 (202.92) | 0.95 (24.17) 13.5% |
| Revolutions per mile (km) | 693.66 (431.02) | 651.05 (404.54) | -42.62 (-26.48) -6.1% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.31 mph (34.29 km/h) |
| 25 mph (40.23 km/h) | 26.64 mph (42.87 km/h) |
| 30 mph (48.28 km/h) | 31.96 mph (51.44 km/h) |
| 35 mph (56.33 km/h) | 37.29 mph (60.01 km/h) |
| 40 mph (64.37 km/h) | 42.62 mph (68.59 km/h) |
| 45 mph (72.42 km/h) | 47.95 mph (77.16 km/h) |
| 50 mph (80.47 km/h) | 53.27 mph (85.73 km/h) |
| 55 mph (88.51 km/h) | 58.6 mph (94.31 km/h) |
| 60 mph (96.56 km/h) | 63.93 mph (102.88 km/h) |
| 65 mph (104.61 km/h) | 69.25 mph (111.45 km/h) |
| 70 mph (112.65 km/h) | 74.58 mph (120.03 km/h) |
| 75 mph (120.7 km/h) | 79.91 mph (128.6 km/h) |
| 80 mph (128.75 km/h) | 85.24 mph (137.18 km/h) |
| 85 mph (136.79 km/h) | 90.56 mph (145.75 km/h) |
| 90 mph (144.84 km/h) | 95.89 mph (154.32 km/h) |
| 95 mph (152.89 km/h) | 101.22 mph (162.9 km/h) |
| 100 mph (160.93 km/h) | 106.55 mph (171.47 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1657 | 1925 | 2073 | 2164 | 2263 | 2334 | 2411 | 2503 | 2630 | 2757 | 2898 | 3010 | 3215 | 3440 | 3617 | 3730 | 3793 | 4026 | 4350 | 5055 |
Better Fuel Economy Factory Ratios Increased Power
