Does it work with mongoose R4050WM 21 speed mountain bike?

I used it on my teens mongoose, unsure of the model, but I would think so?

Does it work for a 21 speed bike?

Yes, we used it for a 21 Speed Mongoose bike

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🚴‍♂️ Shift into the future with precision and power!

WIDE GEAR CAPACITY - Supports up to 34T total capacity with sprockets ranging from 14T to 28T, perfect for varied terrain.
LIGHTWEIGHT YET DURABLE - Crafted from premium aluminum alloy and plastic for long-lasting performance without the bulk.
UNIVERSAL COMPATIBILITY - Fits mountain, road, folding bikes, and more—upgrade your ride with confidence and style.
ROBUST DIRECT MOUNT BUILD - Engineered with a direct mount system for secure attachment and enhanced stability—no hub bolt needed.
SEAMLESS 6 7 SPEED SHIFTING - Optimized for GS 6/7 speed SIS Index drivetrains, ensuring smooth gear transitions on every ride.

The Huazu RD-TZ31-A Rear Derailleur is a high-performance, direct mount gear shifter designed for 6/7 speed mountain and road bikes. Made from durable aluminum alloy, it offers stable, smooth shifting with a total capacity of 34T and fits a wide range of bike types. Backed by a 12-month warranty, it’s the reliable upgrade your bike deserves.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Bs.455

Duties & taxes incl.

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TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Product dimensions	13L x 10W x 4H centimeters
Manufacturer	Huazu
UPC	731235765869
Color	Black
Size	L
Material Type	Aluminum
Batteries Included?	No
Department	unisex-adult
Item model number	RDTZ31A
ASIN	B09WRBHZNT

Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles

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