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Btwin 7- to 9-Speed Rear Derailleur

Sale price: $19.99 Regular price:

Long screed rear derailleur compatible with Shimano and Btwin 7-, 8-, or 9-speed drivetrains for fluid and precise gear changes.

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Sale price: $19.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8328484

Product Videos

Product Features

A photo of the Btwin 7- to 9-Speed Rear Derailleur in use

Btwin 7- to 9-Speed Rear Derailleur is designed for recreational mountain and hybrid bikes with 14 to 24 speeds.

Long screed rear derailleur compatible with Shimano and Btwin 7-, 8-, or 9-speed drivetrains for fluid and precise gear changes.


For B'Twin- and Shimano- compatible 7- or 9-speed drivetrains.


Compatible with 11- to 34-teeth cassettes.

Easy assembly/dismantling

Screw directly onto the derailleur hanger.


10.6 oz.

Product Customer Reviews

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464 Reviews
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Btwin 7- to 9-Speed Rear Derailleur,base color
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Good for the Price

A little difficult to fit but luckily I have a besite who knows how to do it. Ok for an everyday cheaper derailleur.

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Btwin 7to 8 speed derailleur

Excellent value, works a treat, what more can you say, amazing value, does exactly what its meant too.

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works well, Bargain

used this on a 1996 Road bike to increase gear range ! Cheap cheerful and easy to set up

Good Replacment

I am a Professional Bike Mechanic and I needed a reasonable priced long cage rear mech which was Shimano compatible. I had not purchased one and called into Decathlon on my way past to get some cycle kit. I picked one of these units up for the repair I had to do on a Raleigh Ladies Mountain Bike..... The Mech fitted with no issues at all aside of setting up the low and high limit screws as this was being fitted to a 7 speed freewheel. The bike was fitted with the awful grip shifts and with this unit it works 100%... so a cheap and great replacement for O.E equipment

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Nice But Why It Is Out Of Stock



Wanted a Hook Type spare for My Bike. But got a different one while ordering on-line. Would be helpful if seller makes it clear so that customers who are doing a retro-fit can be benefitted. Had to exchange this through my cycle mechanic. Couldn't use it and hence unsure about its utility.

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Bad Quality

I installed this in kross impel 5.1, gear changes automatically, no proper shift .

Hello Pavan

Thank you for taking the time out to review our product, Derailleur should be fixed by a trained technician as after every change/Replacement the gear system needs to tuned properly, cable tension needs to be readjusted, and you also need to check on the compatibility between the Derailleur and Shifters. I would suggest you to visit a cycle shop and ask the technician to check for the tuning.





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The Features Of The Product


Good product, smooth shifting

Shifting is also good, but derailleur weight is high

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Good product made of good quality plastic and metal It has some weight to it which gives the derailleur a tough feel

Good but not up to the 9 gear mark

The shifter is sturdy and will shift easy till 7 gears, pushing it till 8, but could not go to 9, in my MTB. It needs more flexibility in the side swing to cover 9 gears. However, it is really good for its price tag.

Workshop well

Easy to.install and works very well, if will last is a question but at least first 30k no probs and gearshifting goes as a dance.

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Hello Tomas,

Thank you for submitting your review for this 7 to 9 Speed Rear Derailleur! I am glad that this product is working well for you and has served its intended purpose.

Your feedback matters as it allows us to further understand how you use our products, and how we can better improve to serve your sporting needs better in the future.

We look forward to more of your reviews and sharing! In the meantime, keep sporting on, and we hope to see you in our stores soon! :)

Sport on safely!


Digital Interaction Relay

The derailleur exploded

After months riding and maintaining it, one day I was riding small jumps, I landed therefore the derailleur suddenly exploded, the cogs were fine but the whole derailleur just broke into 2, scratching my frame paint and it bent my 8 speed cassette too

Hi Roy

If you're looking to execute stunts on your bike, this is not the ideal derailleur. Nor bike, assuming you are running a bike with 8 speed.

I would suggest you try looking for a proper DJ or slopestyle bike.

Or upgrade your drivetrain system that has a clutch mechanism.

Shimano derailleurs that has a clutch mechanism usually require you to spend quite a bit of cash there to get product designed for it's intended use as usually you would need to swap the entire drivetrain system.

Otherwise, my suggestion is go Single Speed with a DJ frame.

Sportingly, Sazali Mountain Bike Sport Leader

Update after 3 mths use

the pulley cage dented badly one day while cycling uphill but fortunately Decathlon's exchange policy is excellent! Had it exchanged and installed by one of the bike techs! Shifts even better now and i have to say your refund/exchange policy is one of the best in SG and inspires confidence and trust in customers - keep up the good work!

Hi John!

Thank you for the product review and your recommendation to our Decathlon's Return & Exchange Policy as well as workshop services. We in Decathlon are really glad that our users has benefited from our services and policies. Thank you again for your kind and encouraging words, and we will continue to satisfy the sports users in Singapore. Cheers!

Decathlon City Square Mall
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Additional Product Information



  • 100% Steel

Outer fabric

  • 100% Polyamide 6. 6


Screed length: Length Maximum teeth: 36 teeth Min teeth: 11 teeth Steel body



Care instructions

Regularly degrease, clean and lubricate your bike to prevent rust and prolong its lifetime. Do not clean using high-pressure water jets.

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Size Guide Visual