Shimano, Acera RD-M3020, Rear Derailleur, Speed: 7/8, Cage: SGS, Black, ERDM30208SGSL
| Primary Color | Black |
| Cage | SGS |
| RD Spring Type | Top Normal |
| RD Weight | - |
| Speed | 7/8 |
| Max Front Difference | - |
| Maximum Cog | 40T |
| Minimum Cog | 11T |
| RD Capacity | 45T |
| Vendor Item # | ERDM30208SGSL |
| UPC | 192790897738 |
| EAN | 4550170897734 |
| Unit of measure | Each |
| Legacy # | 260021-01 |
| Shipping Length (L) | 4 in |
| Shipping Width (W) | 4 in |
| Shipping Height (H) | 7 in |
| Shipping Weight | 1 lb |