Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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For Your Every Summer RSVP, with Code: SUMMER15
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
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
4.2 ★★★★★
Based on 220 reviews
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Product Reviews
★★★★★ 5
Great fit
Size: 17" Neck 37"-38" Sleeve, Color: Blue Frost
This was a gift for my husband. Fit is great. He's about 6'1" and weighs ~200#. Washes nicely as well. A good purchase
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Reviewed in the United States on January 6, 2026
★★★★★ 5
Comfort& Quality
Size: 20" Neck 35"-36" Sleeve, Color: White
Excellent shirt.
Ordered for a Risky Business bar crawl and the fabric was so much nicer than the other two options I ordered. It is packaged so nice with pins and feels luxurious (great if you’re giving it as a gift.) It comes wrinkled from being folded in the packaging, but i steamed it and then it did not wrinkle while driving or sitting throughout the night. It’s nice and light. Only downfall is there is no pleat in the back.
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Reviewed in the United States on March 31, 2025
★★★★★ 5
Great
Size: 22" Neck 35"-36" Sleeve, Color: White
Product fut good
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Reviewed in the United States on February 17, 2026
★★★★★ 3
Nice shirt.
Size: 17.5" Neck 35"-36" Sleeve, Color: White
It fit perfectly and looked very nice. However, it was much thinner than I thought. And when you wash it, get ready to iron it. This is not a permanent press shirt. It is not wrinkle resistant. I would not buy it again.
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Reviewed in the United States on January 17, 2025
★★★★★ 5
Casual Crew Neck Summer Shirt
Color: Denim Blue, Size: XX-Large
Ordered the dark blue. It fits great and looks wonderful on. Very comfortable! Good value, and feels well made. The fabric is just right – not too thin, or thick. I wore it with a navy blazer and beige pants to an outdoor event (shade and sun) and was totally comfortable.
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Reviewed in the United States on June 2, 2026