Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 285/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 35.95 (913.2) | 5.55 (141) 18.3% |
| Width inches (mm) | 6.89 (175) | 11.22 (285) | 4.33 (110) 62.9% |
| Circum. inches (mm) | 95.51 (2425.94) | 112.95 (2868.9) | 17.44 (442.96) 18.3% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 8.98 (228) | 2.78 (70.5) 44.8% |
| Revolutions per mile (km) | 663.39 (412.21) | 560.96 (348.56) | -102.43 (-63.65) -15.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.65 mph (38.06 km/h) |
| 25 mph (40.23 km/h) | 29.56 mph (47.58 km/h) |
| 30 mph (48.28 km/h) | 35.48 mph (57.1 km/h) |
| 35 mph (56.33 km/h) | 41.39 mph (66.61 km/h) |
| 40 mph (64.37 km/h) | 47.3 mph (76.13 km/h) |
| 45 mph (72.42 km/h) | 53.22 mph (85.64 km/h) |
| 50 mph (80.47 km/h) | 59.13 mph (95.16 km/h) |
| 55 mph (88.51 km/h) | 65.04 mph (104.68 km/h) |
| 60 mph (96.56 km/h) | 70.96 mph (114.19 km/h) |
| 65 mph (104.61 km/h) | 76.87 mph (123.71 km/h) |
| 70 mph (112.65 km/h) | 82.78 mph (133.22 km/h) |
| 75 mph (120.7 km/h) | 88.69 mph (142.74 km/h) |
| 80 mph (128.75 km/h) | 94.61 mph (152.26 km/h) |
| 85 mph (136.79 km/h) | 100.52 mph (161.77 km/h) |
| 90 mph (144.84 km/h) | 106.43 mph (171.29 km/h) |
| 95 mph (152.89 km/h) | 112.35 mph (180.8 km/h) |
| 100 mph (160.93 km/h) | 118.26 mph (190.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1428 | 1658 | 1786 | 1865 | 1950 | 2011 | 2078 | 2156 | 2266 | 2375 | 2497 | 2594 | 2770 | 2964 | 3116 | 3213 | 3268 | 3469 | 3748 | 4356 |
Better Fuel Economy Factory Ratios Increased Power
