Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 280/80-16 | 31/12.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.64 (854.4) | 31.02 (788) | -2.61 (-66.4) -7.8% |
| Width inches (mm) | 11.02 (280) | 12.52 (318) | 1.5 (38) 13.6% |
| Circum. inches (mm) | 105.68 (2684.18) | 97.46 (2475.58) | -8.21 (-208.6) -7.8% |
| Sidewall Height inches (mm) | 8.82 (224) | 7.51 (190.8) | -1.31 (-33.2) -14.8% |
| Revolutions per mile (km) | 599.57 (372.55) | 650.09 (403.95) | 50.52 (31.39) 8.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.45 mph (29.69 km/h) |
| 25 mph (40.23 km/h) | 23.06 mph (37.11 km/h) |
| 30 mph (48.28 km/h) | 27.67 mph (44.53 km/h) |
| 35 mph (56.33 km/h) | 32.28 mph (51.95 km/h) |
| 40 mph (64.37 km/h) | 36.89 mph (59.37 km/h) |
| 45 mph (72.42 km/h) | 41.5 mph (66.79 km/h) |
| 50 mph (80.47 km/h) | 46.11 mph (74.21 km/h) |
| 55 mph (88.51 km/h) | 50.73 mph (81.64 km/h) |
| 60 mph (96.56 km/h) | 55.34 mph (89.06 km/h) |
| 65 mph (104.61 km/h) | 59.95 mph (96.48 km/h) |
| 70 mph (112.65 km/h) | 64.56 mph (103.9 km/h) |
| 75 mph (120.7 km/h) | 69.17 mph (111.32 km/h) |
| 80 mph (128.75 km/h) | 73.78 mph (118.74 km/h) |
| 85 mph (136.79 km/h) | 78.39 mph (126.16 km/h) |
| 90 mph (144.84 km/h) | 83.01 mph (133.58 km/h) |
| 95 mph (152.89 km/h) | 87.62 mph (141.01 km/h) |
| 100 mph (160.93 km/h) | 92.23 mph (148.43 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 | 2408 | 2499 | 2626 | 2753 | 2893 | 3006 | 3210 | 3435 | 3611 | 3724 | 3787 | 4020 | 4344 | 5048 |
Better Fuel Economy Factory Ratios Increased Power
