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- USA
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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9
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For Your Every Summer RSVP, with Code: SUMMER15
Description
microSHIFT M21 Rear Derailleur - 6/7 Speed, Super Short 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 Largest Cog: 32 Rear Der Shifter Compatibility: Shimano Mountain Rear Der Shifter Compatibility: Shimano Road Rear Derailleur Mount Type: 10x1 Standard
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
- Largest Cog: 32
- Rear Der/Shifter Compatibility: Shimano Mountain
- Rear Der/Shifter Compatibility: Shimano Road
- Rear Derailleur Mount Type: 10x1 Standard
- Drivetrain Speeds: 6
- Drivetrain Speeds: 7
- Chain Wrap Capacity (teeth): 21
- Cage Length: Short
- Color: Black
- Weight: 241
Today's Stock Status
10+ Available to ship in 2-4 Business Days
UPC: 708752522510
EAN: Not available
Manufacturer Part Number: RD-M21SS
RD0046
196226-Q0-L
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Impressed, good equality, size fit, great price.
Size: Small, Color: Coral Orange
Impressed with these polo shirts from Amazon. Bought a few colors. Went with small size, I am thin and work out, seems to fit perfectly, I even washed them in hot and dried hot to keep the shape I wanted, all looks good. Great price.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Good cotton shirt
Size: Large, Color: Blue/White Palm
Nice shirt for low price AND 100% cotton! Prepare for shrinkage with warm water wash and medium heat dryer. Use cold water and hang dry to keep length
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Reviewed in the United States on May 2, 2026
★★★★★ 4
Decent polo
Size: X-Large, Color: Red
Decent quality, I ordered XL which fit loose until I washed/dried it now it fits pretty good. I will say the neck hole is rather large compared to my more expensive polos
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Reviewed in the United States on May 11, 2026
★★★★★ 5
Perfect Red for Pentecost!
Size: Large, Color: Brick Red
This polo is the perfect fit for my athletic, 67 year old husband. We wanted to wear red to Church for Pentecost, and this scarlet red matched my dress, perfectly!
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Reviewed in the United States on May 20, 2026
★★★★★ 3
Could be 5 but it’s 3 stars
Size: Small, Color: Bright Emerald Green
These polos considering the price and more than decent quality in general, are easy 5 stars plus… however quality control needs to step it up.. these shirts are hits and misses and you never know what your going to get. This green polo was a miss. The left shoulder has an overlap on the seam at the should and sleeve of which creates a horn like effect when wearing the shirt. Looks like the outfits worn by villains in the power rangers series. But like I said, can easily be 5+ stars and even on this defective shirt, the material is very good for the price. I recommend these polos but just expect a few will defective.
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Reviewed in the United States on May 20, 2026