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Mountain Bike Chainset 3 Speeds 7, 8 & 9

Sale price: $20.00 Regular price: $34.99

Triple 7, 8, and 9-speed chainwheels for mountain biking.

Color: Select a color
Size: Select a size
Sale price: $20.00 Regular price: $34.99

Free shipping over $49

Final Sale: No returns or exchanges

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Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8003052

Product Videos

Product Features

A photo of the Mountain Bike Chainset 3 Speeds 7, 8 & 9 in use

Mountain Bike Chainset 3 Speeds 7, 8 & 9 | mountain biking. Aluminum, lightweight and durable.

Triple 7, 8, and 9-speed chainwheels for mountain biking.


7- to 9-speed drive train, with square taper bottom bracket (min. length 113 mm)


175 mm cranks and 3 42x32x22 chainrings.


Aluminum body and steel chainwheel to combine light weight and sturdiness.

Questions & Answers

Product Customer Reviews

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406 Reviews
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Mountain Bike Chainset 3 Speeds 7, 8 & 9,black
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Very good

Very good

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good quality and price. works great

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Good kit

Top of my list for economic parts when repairing friends bikes

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Great work !!

Hi all just to thank Bernardo for helping me with my bike. His great advise and patience to explain everything related with the parts that needed to be changed from my bike and how this should improve the performance of the bike for the next few months was fantastic. The results were great, I’m very happy with the changes done. I will recommend all my friends to bring their bikes to be sorted with Bernardo. His honesty and knowledge are very much appreciate.

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Good triple chainring.

I bought this for a friend, fitted it as his old set were worn out and the chain was slipping on the chain ring teeth even with a new chain and cassette. Great price for this item.

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… initially operated as smooth as butter, after 6 months / 600miles it turns out it is also made of butter. Would love to attach photos, safely say outer & middle set is mere scrap. Pay for what you get!

In normal riding conditions, as long as the chain is new and not worn when replaced, the chain rings should clearly outlast these distances. If possible, could you DM me with a few photos as I wish to forward them on to b'Twin in France.
I look forward to hearing from you.
Peter Lazarus, National Cycling Manager, DECATHLON
a good value crankset

This is a high quality crankset at a very reasonable price. The only whinge is that it could do with stoppers/covers over the bolts at either end

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It did a great job before my bike got stolen.

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Great replacement chainset

Looking to replace the chipset on your mountain bike hack then look no further. I've fitted 2 of these in the last year, one on my commuting steel Rockhopper and one on my father in law's bike, both easy to fit, smooth gear shifting and durable. Mine's done over 2k miles without issue

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chain ring triple

excellent finish nice light weight .easy fit

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Could you tell me the length of the crank arms. Pl

Could you tell me the length of the crank arms. Please.

The crank length is 175mm.
Peter Lazarus UK Cycling Market Manager DECATHLON
Crankset did the job

Easy to fit, matched in with current bike gear change etc. Good quality and value for money.

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Economical, reliable upgrade or replacement.

This was for a Riverside five bike. The chain was shot and it was felt advisable to fit a new cassette and chainring at the same time, which is recommended. The total cost was less than £50 - very reasonable. The fitted chainrings were basic Shimano non separable. This item is separable, so next time only the affected ring needs replacing. The crankset also comes with bolts (v. easy to fit) and a little plastic spacer in case your front mech needs repositioning.

Great product with value for money

Got it from decotholon in quick time and the product is of very good standard. Easy to install . Light weight and works well .

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Additional Product Information


Main fabric

  • 100% Alloy



Care instructions

Avoid using high-pressure water jets to clean your bicycle.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
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    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

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    Minimal retail footprint

    lowers overhead and indirect costs


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