⚡ Shift into the future with precision and power!
The RD-TY21B is a high-performance rear derailleur designed for 6/7 speed bikes, crafted from durable aluminum alloy with a direct mount system. Compatible with a wide range of bicycles including mountain, commuter, cruiser, and folding bikes, it delivers reliable, smooth gear changes and a secure fit for enhanced riding stability.
| Mounting Type | Direct Mount |
| Number of Teeth | 14 |
| Manufacturer | Relwears |
| Item Package Dimensions L x W x H | 5.47 x 5.39 x 2.76 inches |
| Package Weight | 0.34 Kilograms |
| Brand Name | Relwears |
| Warranty Description | 1 |
| Model Name | TY21B Rear Derailleur |
| Included Components | NO |
| Size | 6/7 Speed |
M**.
Smooth shifting.
This item is easy to install and performs smoothly, the price is right.
C**R
It's a cheap Shimano - just what I needed and OEM
Excellent, a new Shimano RD-TY21B - an exact duplicate of the mangled one I am replacing on a Jasion CB1 ebike I rescued from a guy on Facebook Marketplace. Very happy to have it cheaper even than my local bike shop and almost as fast to have it in hand.
D**K
Works ok.
Works ok. I've seen better and seen worse.
X**O
Look me up online!
Straight forward as far as derailleurs go. Though it is only the derailleur in the box. No paperwork or any details about the item. Not even installation instructions. I had to YouTube how to attach and snake the chain through. (I’m new at this whole bike maintenance thing……VERY new)
W**S
Lowest end Shimano. Buy Upgraded versions
Low end product, look for higher end derailleur. TX800 is better and only a few dollars more. Just make sure to get hanger brackets if necessary. Two of mine broke.
K**E
Good repair part for the money
Used this to fix my Mongoose mountain bike when the original derailleur blew up and got wadded up in the spokes.
J**A
Buen precio, buena calidad.
Excellent material quality.
T**S
It works well.
It's easy to install.
Trustpilot
1 day ago
1 month ago
