Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/85-18 | 280/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 35.64 (905.2) | 9.61 (244) 36.9% |
| Width inches (mm) | 4.72 (120) | 11.02 (280) | 6.3 (160) 133.3% |
| Circum. inches (mm) | 81.78 (2077.22) | 111.96 (2843.77) | 30.18 (766.55) 36.9% |
| Sidewall Height inches (mm) | 4.02 (102) | 8.82 (224) | 4.8 (122) 119.6% |
| Revolutions per mile (km) | 774.76 (481.41) | 565.92 (351.65) | -208.84 (-129.77) -27% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.38 mph (44.06 km/h) |
| 25 mph (40.23 km/h) | 34.23 mph (55.08 km/h) |
| 30 mph (48.28 km/h) | 41.07 mph (66.1 km/h) |
| 35 mph (56.33 km/h) | 47.92 mph (77.11 km/h) |
| 40 mph (64.37 km/h) | 54.76 mph (88.13 km/h) |
| 45 mph (72.42 km/h) | 61.61 mph (99.15 km/h) |
| 50 mph (80.47 km/h) | 68.45 mph (110.16 km/h) |
| 55 mph (88.51 km/h) | 75.3 mph (121.18 km/h) |
| 60 mph (96.56 km/h) | 82.14 mph (132.19 km/h) |
| 65 mph (104.61 km/h) | 88.99 mph (143.21 km/h) |
| 70 mph (112.65 km/h) | 95.83 mph (154.23 km/h) |
| 75 mph (120.7 km/h) | 102.68 mph (165.24 km/h) |
| 80 mph (128.75 km/h) | 109.52 mph (176.26 km/h) |
| 85 mph (136.79 km/h) | 116.37 mph (187.28 km/h) |
| 90 mph (144.84 km/h) | 123.21 mph (198.29 km/h) |
| 95 mph (152.89 km/h) | 130.06 mph (209.31 km/h) |
| 100 mph (160.93 km/h) | 136.9 mph (220.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1440 | 1673 | 1802 | 1881 | 1967 | 2028 | 2096 | 2176 | 2286 | 2396 | 2519 | 2617 | 2795 | 2991 | 3144 | 3242 | 3297 | 3499 | 3781 | 4394 |
Better Fuel Economy Factory Ratios Increased Power
