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⚙️ Shift into the future of smooth rides — don’t get left behind!
The Shimano Acera RD-M3020-SGS Rear Derailleur features advanced Double Servo technology for precise shifting, a long cage design supporting up to 45 teeth chain wrap, and compatibility with 7 and 8-speed drivetrains. Made from durable aluminum and weighing only 381g, it offers a reliable, lightweight upgrade for versatile cycling performance.
| ASIN | B0BGFBSYQ3 |
| Best Sellers Rank | #87,574 in Sporting Goods ( See Top 100 in Sporting Goods ) #106 in Bike Shifters & Parts |
| Brand Name | SHIMANO |
| Case Material Type | Aluminum |
| Color | black / black |
| Customer Reviews | 4.7 4.7 out of 5 stars (179) |
| Included Components | Rear Derailleur |
| Item Weight | 0.39 Kilograms |
| Manufacturer | SHIMANO |
| Manufacturer Part Number | ERDM30208SGSL |
| Material Type | Aluminum |
| Model Number | ERDM30208SGSL |
| Mount Type | Braze-On Mount |
| Number of Teeth | 45 |
| UPC | 192790897738 |
J**7
Execelente
T**R
I have a Fuji Sunfire hybrid bicycle. Long time ago the original derailleur was damaged and somebody in the bike shop told me to get Deore Derailleur because it is considered to be higher end. At that time I did not realize that the Deore is for another speed count and struggled for years as it did not shift correctly. Finally started to research and found the Acera is the one that fits my bicycle. Got this one, installed and suddenly the bicycle is shifting good, running good and does not make any problems anymore.
J**F
Works great on my wife’s bike after adjusting. Can handle larger cassette than older Acera Derailleur. Shift well. Using on a 1 by 8 speed cassette, shout also work with a 2 or 3 speed front derailleur.
A**A
Schaltwerk fahrad
G**O
I needed a long cage derailleur to accommodate an 11-40T Shimano cassette. The installation was easy and fast. By following the instructions from the following video on Youtube by Park Tool, "How to Adjust a Rear Derailleur – Limit Screws & Indexing," the derailleur performs well. The shifting is on point, quiet, and smooth. I am very satisfied with the derailleur.
Trustpilot
1 day ago
1 month ago