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

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

Product ID: 756514394

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Details

Brand
Huazu
Colour
Black
Material
Aluminium
Item weight
0.28 Kilograms
Mounting type
Braze-On Mount

🔩Direct mount design

⚙️6/7 speed compatibility

🛠️Durable aluminum alloy

Description

🚴‍♂️ Shift into the future with precision and power!

PREMIUM ALUMINUM ALLOY - Crafted from durable aluminum and plastic alloys for long-lasting stability and performance.
WIDE GEAR RANGE CAPACITY - Supports up to 34T total capacity with sprockets ranging from 14T to 28T for versatile terrain handling.
ROBUST DIRECT MOUNT BUILD - Engineered with a direct mount system for quick installation and enhanced frame compatibility.
SEAMLESS 6 7 SPEED SHIFTING - Optimized for GS 6/7 speed SIS Index drivetrains, ensuring smooth gear transitions on every ride.
UNIVERSAL FIT FOR ADVENTURE - Perfectly compatible with mountain, road, and folding bikes—upgrade your ride with confidence.

The Huazu RD-TZ31-A Rear Derailleur is a high-performance, direct mount gear shifter designed for 6 and 7-speed mountain bikes. Made from durable aluminum alloy, it offers stable and reliable shifting with a total capacity of 34T, accommodating sprockets from 14T to 28T. Compatible with various bike types, this derailleur ensures smooth, precise gear changes for the modern cyclist seeking both durability and versatility.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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668 DH

Duties & taxes incl.

Moroccostore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Product dimensions	13L x 10W x 4H centimetres
Manufacturer	Huazu
UPC	731235765869
Color	Black
Size	L
Material type	Aluminium
Batteries included?	No
Department	Unisex
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

Details

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