Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/75-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.5) | 30.98 (786.84) | 3.28 (83.34) 11.8% |
| Width inches (mm) | 8.46 (215) | 10.51 (267) | 2.05 (52) 24.2% |
| Circum. inches (mm) | 87.01 (2210.11) | 97.32 (2471.93) | 10.31 (261.82) 11.8% |
| Sidewall Height inches (mm) | 6.35 (161.25) | 7.99 (202.92) | 1.64 (41.67) 25.8% |
| Revolutions per mile (km) | 728.17 (452.47) | 651.05 (404.54) | -77.13 (-47.92) -10.6% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.37 mph (36 km/h) |
| 25 mph (40.23 km/h) | 27.96 mph (45 km/h) |
| 30 mph (48.28 km/h) | 33.55 mph (54 km/h) |
| 35 mph (56.33 km/h) | 39.15 mph (63 km/h) |
| 40 mph (64.37 km/h) | 44.74 mph (72 km/h) |
| 45 mph (72.42 km/h) | 50.33 mph (81 km/h) |
| 50 mph (80.47 km/h) | 55.92 mph (90 km/h) |
| 55 mph (88.51 km/h) | 61.52 mph (99 km/h) |
| 60 mph (96.56 km/h) | 67.11 mph (108 km/h) |
| 65 mph (104.61 km/h) | 72.7 mph (117 km/h) |
| 70 mph (112.65 km/h) | 78.29 mph (126 km/h) |
| 75 mph (120.7 km/h) | 83.88 mph (135 km/h) |
| 80 mph (128.75 km/h) | 89.48 mph (144 km/h) |
| 85 mph (136.79 km/h) | 95.07 mph (153 km/h) |
| 90 mph (144.84 km/h) | 100.66 mph (162 km/h) |
| 95 mph (152.89 km/h) | 106.25 mph (171 km/h) |
| 100 mph (160.93 km/h) | 111.85 mph (180 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
