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Description
microSHIFT M21 Rear Derailleur - 6,7 Speed, Long Cage, BlackM21 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 Product Specifics Rear Derailleur Mount Type: 10x1 Standard Rear Der Shifter Compatibility: Shimano Mountain Cage Length: Long Drivetrain Speeds: 6 Drivetrain Speeds: 7
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
Product Specifics
- Rear Derailleur Mount Type: 10x1 Standard
- Rear Der/Shifter Compatibility: Shimano Mountain
- Cage Length: Long
- Drivetrain Speeds: 6
- Drivetrain Speeds: 7
- Weight: 206
- Color: Black
- Chain Wrap Capacity (teeth): 43
- Largest Cog: 32
Today's Stock Status
10+ Available to ship in 2-4 Business Days
UPC: Not available
EAN: 4710495436340
Manufacturer Part Number: RD-M21L
RD0210
167890-Q0-L
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4.9 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Very sturdy but heavy
Size: 42 inch 2 Tier, Size: 42 inch 2 Tier
Easy to put together. A little bit too heavy for Sheetrock. I had to use some bigger screws.
I love the look with my cabinet.
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Reviewed in the United States on January 20, 2026
★★★★★ 5
Incredible job very thorough
Format: Paperback
It's been 20 years since I took my FP-C exam at the Air Medical transport conference in Reno 2003. I was fortunate enough to take Lori Montanez's 12 hour review prior and to have the study guide she published. I still have that guide and it was great. You all who put this together did an incredible job in every way . It could no be better. The text the pictures everything perfect. I'm proud of you for doing such a great and professional job. Everyone should have a copy of this book either for exam prep and for regular review following their completion. Thank you.
Aaron schumaker, NR/EMT-P, CCEMT-P, PNCCT, FP-C 000324
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Reviewed in the United States on March 4, 2023
★★★★★ 5
Review
Format: Paperback
Good book to start the test prep process. Well written.
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Reviewed in the United States on April 4, 2025
★★★★★ 5
Great study material
Format: Paperback
This is an excellent book.
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Reviewed in the United States on January 20, 2025
★★★★★ 4
Follows the IA Med Course
Format: Paperback
I bought this as I am completing the IA-Med 2.0 Flight Medical Provider. Overall I am happy with the book. It follows the course, but there are some of the quiz questions at the end of the sections that aren't printed in the book.
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Reviewed in the United States on October 24, 2023