M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs.
- Robust composite and steel construction
- Compatible with Shimano 6- and 7-speed mountain and road systems
Manufacturer microSHIFT
Manufacturer Part Number RD-M21SA
UPC 4710495436371
Model microSHIFT M21 Rear Derailleur
Rear Derailleur Style Mountain
Chain Wrap Capacity (teeth)
39
Rear Der/Shifter Compatibility
Shimano Mountain
Rear Derailleur Mount Type
Dropout Claw Hanger
Usually Ships in 2-3 DaysPlease Note: This product is usually available for shipment within 2 business days for orders placed before 3pm EST, Monday through Friday or within 3 business days for orders placed after 3pm EST, Monday through Friday.
Contact for in-store availability, not all items are available for immediate pickup. If we are unable to meet these time frames due the rapid changes in revolving inventory you will be contacted via email. We do not partial ship orders, the delivery time of your order is determined by the item on your order with the longest lead time. If your order is time sensitive we encourage you to
contact us for up to the minute product availability and ship times to verify that we can accommodate your needs. Refer to our
Shipping Terms for more information.