Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 280/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 29.02 (737.2) | -0.67 (-17) -2.3% |
| Width inches (mm) | 6.5 (165) | 11.02 (280) | 4.53 (115) 69.7% |
| Circum. inches (mm) | 93.28 (2369.39) | 91.18 (2315.98) | -2.1 (-53.41) -2.3% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 5.51 (140) | -0.33 (-8.5) -5.7% |
| Revolutions per mile (km) | 679.22 (422.05) | 694.89 (431.78) | 15.66 (9.73) 2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.55 mph (31.46 km/h) |
| 25 mph (40.23 km/h) | 24.44 mph (39.33 km/h) |
| 30 mph (48.28 km/h) | 29.32 mph (47.19 km/h) |
| 35 mph (56.33 km/h) | 34.21 mph (55.06 km/h) |
| 40 mph (64.37 km/h) | 39.1 mph (62.92 km/h) |
| 45 mph (72.42 km/h) | 43.99 mph (70.79 km/h) |
| 50 mph (80.47 km/h) | 48.87 mph (78.65 km/h) |
| 55 mph (88.51 km/h) | 53.76 mph (86.52 km/h) |
| 60 mph (96.56 km/h) | 58.65 mph (94.38 km/h) |
| 65 mph (104.61 km/h) | 63.53 mph (102.25 km/h) |
| 70 mph (112.65 km/h) | 68.42 mph (110.12 km/h) |
| 75 mph (120.7 km/h) | 73.31 mph (117.98 km/h) |
| 80 mph (128.75 km/h) | 78.2 mph (125.85 km/h) |
| 85 mph (136.79 km/h) | 83.08 mph (133.71 km/h) |
| 90 mph (144.84 km/h) | 87.97 mph (141.58 km/h) |
| 95 mph (152.89 km/h) | 92.86 mph (149.44 km/h) |
| 100 mph (160.93 km/h) | 97.75 mph (157.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1768 | 2054 | 2212 | 2310 | 2415 | 2491 | 2574 | 2671 | 2807 | 2942 | 3093 | 3213 | 3431 | 3672 | 3860 | 3981 | 4048 | 4297 | 4643 | 5395 |
Better Fuel Economy Factory Ratios Increased Power
