Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-23 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.41 (797.7) | 30.98 (786.84) | -0.43 (-10.86) -1.4% |
| Width inches (mm) | 12.01 (305) | 10.51 (267) | -1.5 (-38) -12.5% |
| Circum. inches (mm) | 98.66 (2506.05) | 97.32 (2471.93) | -1.34 (-34.12) -1.4% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 7.99 (202.92) | 3.79 (96.17) 90.1% |
| Revolutions per mile (km) | 642.18 (399.03) | 651.05 (404.54) | 8.86 (5.51) 1.4% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.73 mph (31.75 km/h) |
| 25 mph (40.23 km/h) | 24.66 mph (39.69 km/h) |
| 30 mph (48.28 km/h) | 29.59 mph (47.62 km/h) |
| 35 mph (56.33 km/h) | 34.52 mph (55.56 km/h) |
| 40 mph (64.37 km/h) | 39.46 mph (63.5 km/h) |
| 45 mph (72.42 km/h) | 44.39 mph (71.43 km/h) |
| 50 mph (80.47 km/h) | 49.32 mph (79.37 km/h) |
| 55 mph (88.51 km/h) | 54.25 mph (87.31 km/h) |
| 60 mph (96.56 km/h) | 59.18 mph (95.25 km/h) |
| 65 mph (104.61 km/h) | 64.12 mph (103.18 km/h) |
| 70 mph (112.65 km/h) | 69.05 mph (111.12 km/h) |
| 75 mph (120.7 km/h) | 73.98 mph (119.06 km/h) |
| 80 mph (128.75 km/h) | 78.91 mph (126.99 km/h) |
| 85 mph (136.79 km/h) | 83.84 mph (134.93 km/h) |
| 90 mph (144.84 km/h) | 88.77 mph (142.87 km/h) |
| 95 mph (152.89 km/h) | 93.71 mph (150.81 km/h) |
| 100 mph (160.93 km/h) | 98.64 mph (158.74 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
