Shimano RD-TZ31A Bike Rear Derailleur 6/7 Speed Direct Mount


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Shimano RD-TZ31A Bike Rear Derailleur

The Shimano RD-TZ31A Bike Rear Derailleur is a high-quality, durable, and reliable component designed to enhance the performance of your 6-7 speed bicycle. This rear derailleur is made from high-quality materials, including a sturdy and corrosion-resistant steel frame, making it perfect for long-lasting use.

Designed to provide smooth and precise shifting, this rear derailleur features a direct mount design that provides enhanced stability and rigidity for your bike's drivetrain. This ensures that your chain remains securely in place, even when riding on rough terrain.

Installation of the Shimano RD-TZ31A Bike Rear Derailleur is straightforward, and the derailleur is compatible with a wide range of bicycle models. It is easy to adjust and tune to ensure optimal shifting performance, and the direct mount design means that it is easy to install and remove.


  • MODEL: RD-TZ31A Black Rear Derailleur
  • PERFORMANCE: Forged with high-hardness aluminum alloy. The hollow weight-reduction design is adopted, and the speed change is more stable.
  • PRECISE ADJUSTMENT: High-hardness aluminum alloy body adjustment, adjustment is more precise. It can be adjusted slightly in multiple places to ensure accurate speed change performance.
  • INSTALLATION: Fast and convenient installation and easy maintenance. (Note: The bike rear derailleur is a direct mount, not a hub bolt mount. Please check the mount type of the original part before ordering.)
  • SCOPE OF APPLICATION: Suitable for mountain bikes, station wagons, folding bikes, etc. 

Shimano RD-TZ31A Bike Rear Derailleur Detail Photo


Model Shimano RD-TZ31A
Material Aluminum Alloy
Speed grade 6 speed/7 speed
Installation method Direct Mount
Weight  About 260g

Customer Reviews

Based on 22 reviews
Jaens Polo
god replacement

This was a good replacement for my 30 year old Schwinn 10 speed. It would have been a breeze to install if I had a means to break my chain.The old derailleur just broke. Probably worn out. This new one was a perfect match and fit for his bike. Easy to put on he said. The price was good and the shipping too. No issues.

Ray Carrillo
Good product

Like everything about it I like Shimano

Tommy B
So far so good, shifts nice!

I was hoping for a little more stable mounting but I guess that's normal!

John Radicone
Original anufactor

Good product. Original product

Dado Maker
Fixed my old trek 800 but….

...Looked like it was a returned item. The lock washer for the cable was small and softer than the original shimano on this bike so I reused the old one. Other than that, works great as it adjusted nicely shifting smoothly!

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What should I consider when choosing bicycle tires?

When selecting bicycle tires, consider the size, tread, width, durability, pressure, weight, and riding style. Choose a tire that fits your bike's wheels, is appropriate for the terrain you'll be riding on, is durable and puncture-resistant, can handle the recommended tire pressure, and matches your riding style.

What size bike tire do I need for my bike?

To determine the size of tire you need for your bike, you can look at the sidewall of your current wheel, which will have the tire size printed on it. The size will typically be expressed as a combination of numbers and letters, such as "700x23c" or "26x2.0". The first number refers to the diameter of the tire, which is measured in millimeters for metric sizes (e.g. 700) or inches for imperial sizes (e.g. 26). The second number refers to the width of the tire, also measured in millimeters or inches. The letter at the end indicates the type of tire (e.g. "c" for clincher)
If you're unsure about what size tires to get or have any doubts about compatibility, you can consult your bike's owner's manual or contact the manufacturer for advice.

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