Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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For Your Every Summer RSVP, with Code: SUMMER15
Description
microSHIFT M21 Rear Derailleur - 6,7 Speed, 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: 34 Rear Der Shifter Compatibility: Shimano Mountain Rear Derailleur Mount Type: 10x1 Standard 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
- Largest Cog: 34
- Rear Der/Shifter Compatibility: Shimano Mountain
- Rear Derailleur Mount Type: 10x1 Standard
- Drivetrain Speeds: 6
- Drivetrain Speeds: 7
- Chain Wrap Capacity (teeth): 39
- Cage Length: Short
- Color: Black
Today's Stock Status
1 Ready to ship or pickup from Utah
10+ Available to ship in 2-4 Business Days
UPC: 4710495436364
EAN: Not available
Manufacturer Part Number: RD-M21S
RD0034
184142-Q1-L43D03
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
4.6 ★★★★★
Based on 1546 reviews
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Product Reviews
★★★★★ 3
Not a Good Choice for Chewers
Color: Get Ripped Margrrrita, Size: L
I loved the idea of this toy, but it did not work or last as intended. It is pretty heavy and made of thick rubber. The flaps over the cup where the treats are dispensed did not last 5 minutes with my pup, so we can no longer use it to dispense treats/use as a brain game.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Super fun, my dog loves it!
Color: Hambone Super Chewer, Size: M/L
I adopted a Feist/Pit mix and this was the first toy I got him for just him. He went nuts for it! He’s a destructive pup so ripping the soft “skin” off of hambone really helped him release some pent up energy! Now he carries it around in the yard and just chews on it. If you have tiny treats, drop em in the nose holes and watch your pup go crazy trying to get them out!
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Reviewed in the United States on May 18, 2026
★★★★★ 2
Not for super chewers
Color: Hambone Super Chewer, Size: M/L
Had to take it away from my dog the same evening I gave it to him because a chunk came off. I did not want him to choke on the pieces.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
A favorite for my boys!
Color: Hambone Super Chewer, Size: M/L
My dogs love this toy, it satisfied their need to rip up a toy and still allowed them to play long after the top layer was torn apart to enjoy! It bounces well and has still held up with my chewers, this is still one of my dogs favorite toys to play fetch with!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Great toy
Color: Hambone Super Chewer, Size: M/L
My dog loves this toy so much. He's not quite so aggressive with his chewing, now that he's getting older, but this toy lasted through his younger years, and recently started to show signs of wear. He was so sad when I threw it out, that I had to replace it. Glad it still exists - we got the first one probably 5 years ago.
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Reviewed in the United States on January 4, 2026