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Btwin 12" x 25" 9-Speed Bike Cassette

Sale price: $24.99 Regular price:

Versatile 12x25 9-speed cassette for all gradients and compatible with all 9-speed derailleurs and chains: Shimano, SRAM, MicroSHIFT, Btwin and KMC

Color: Select a color
Size: Select a size
Sale price: $24.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8389806

Product Videos

Product Features

A photo of the Btwin 12" x 25" 9-Speed Bike Cassette in use

Btwin 12" x 25" 9-Speed Bike Cassette is designed for road and hybrid bikes fitted with a 9-speed drive train. Fits Shimano and Sram.

Versatile 12x25 9-speed cassette for all gradients and compatible with all 9-speed derailleurs and chains: Shimano, SRAM, MicroSHIFT, Btwin and KMC


9-speed Shimano, SRAM, MicroSHIFT, Btwin, and KMC derailleur and chain


Gears: 12, 13, 14, 15, 17, 19, 21, 23, 25


10.4 oz.

Product Customer Reviews

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Btwin 12
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good cassette

Close to 9 speed sora equivalent. Most people won't notice a difference. Best non-shimano 9 speed road cassette I've tried on a shimano drivetrain (and I've tried a lot!).

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Bike Gear Cassette

Shame I ordered the wrong Cassette ... need to read online details very carefully to ensure the right one is ordered. (Ordered for road bike rather than MTB!)

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Fit for purpose

Cost effective replacement for worn cassette. Cheap, reliable and reminds me why I run 9 speed Sora on my winter bike.

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good quality

good quality buy i had ti return it as didn't actually needing it

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Got this for a rebuild of a hybrid for a customer they loved it was perfect for their commute

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Compatible to Shimano 9 speed drivetrain

The cassette is compatible to Shimano 9 speed drivetrain. For a fraction of the price of Shimano parts, I can complete my newly-built bike with a 9 speed drivetrain. Smoothness of transmission & gear quality is 9/10 rating compared to Shimano 9 speed drivetrain, which is not significant to most users

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Hello Lim

Thank you for taking the time to write us a review regarding our product.
In Decathlon, we believe that to get this kind of information from our users is the best way to improve what we are doing.
We are glad that you are satisfied with our products :)
Do check out more of our products at
We hope to be able to serve you again and see you around in Decathlon! :)

Stay Healthy, Be Sporty!

Maisarah Ashley | Sports Leader @ Decathlon Singapore Lab
Líp shimano 105 12x25

Giao hàng nhanh bao bì OK. Sản phẩm như mong muốn

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9- Fach Kassetten

Für den Preis unschlagbar

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Cumple su función

No me ha dado ningún problema

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Precio calidad excelente

Precio calidad excelente.

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Perfecto gracias

el envío fue rápido y en perfecto estado

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Excellent produit. On verra sur le long terme, mais ça semble bien parti!

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Cassette 9 vitesses

Déjà acheter précédemment et pas de problème

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Pas pu tester longtemps…

Pas pu tester longtemps car je me suis fait voler mon vélo à domicile deux semaines après. Je n'ai pas senti de différence avec la cassette d'origine, je voulais aller plus vite, pas vu de différence.

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Additional Product Information


Main fabric

  • 100% Steel

Technical information

Gears: 12,13,14,15,17,19, 21,23,25 12 x 25 teeth 10.4 oz

Care tips

Degrease, clean and lubricate your cassette regularly to prolong life. It is recommended you replace the chain each time the cassette is replaced. Do not clean using high-pressure water jets


Easy assembly with a cassette remover wrench available on our website (ref: 8351088) and an adjustable or open-ended wrench.


Easy disassembly with a cassette remover wrench available on our website (ref: 8351088) and an adjustable wrench or open-ended wrench and a chain-whip tool.



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Size Guide Visual