Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 29.5/10.5-15 | 31/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.51 (749.46) | 31.03 (788.04) | 1.52 (38.58) 5.1% |
| Width inches (mm) | 10.51 (267) | 12.52 (318) | 2.01 (51) 19.1% |
| Circum. inches (mm) | 92.7 (2354.5) | 97.47 (2475.7) | 4.77 (121.2) 5.1% |
| Sidewall Height inches (mm) | 7.25 (184.23) | 8.01 (203.52) | 0.76 (19.29) 10.5% |
| Revolutions per mile (km) | 683.52 (424.72) | 650.06 (403.93) | -33.46 (-20.79) -4.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.84 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.3 km/h) |
| 30 mph (48.28 km/h) | 31.54 mph (50.77 km/h) |
| 35 mph (56.33 km/h) | 36.8 mph (59.23 km/h) |
| 40 mph (64.37 km/h) | 42.06 mph (67.69 km/h) |
| 45 mph (72.42 km/h) | 47.32 mph (76.15 km/h) |
| 50 mph (80.47 km/h) | 52.57 mph (84.61 km/h) |
| 55 mph (88.51 km/h) | 57.83 mph (93.07 km/h) |
| 60 mph (96.56 km/h) | 63.09 mph (101.53 km/h) |
| 65 mph (104.61 km/h) | 68.35 mph (109.99 km/h) |
| 70 mph (112.65 km/h) | 73.6 mph (118.45 km/h) |
| 75 mph (120.7 km/h) | 78.86 mph (126.91 km/h) |
| 80 mph (128.75 km/h) | 84.12 mph (135.38 km/h) |
| 85 mph (136.79 km/h) | 89.38 mph (143.84 km/h) |
| 90 mph (144.84 km/h) | 94.63 mph (152.3 km/h) |
| 95 mph (152.89 km/h) | 99.89 mph (160.76 km/h) |
| 100 mph (160.93 km/h) | 105.15 mph (169.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1654 | 1922 | 2070 | 2161 | 2260 | 2330 | 2407 | 2499 | 2626 | 2752 | 2893 | 3006 | 3210 | 3435 | 3611 | 3724 | 3787 | 4020 | 4343 | 5047 |
Better Fuel Economy Factory Ratios Increased Power
