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Adjustable Aheadset Oversize Stem

Sale price: $24.99 Regular price:
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Sale price: $24.99 Regular price:

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Model: 8272094

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Product Features

A photo of the Adjustable Aheadset Oversize Stem in use

Adjustable Aheadset Oversize Stem is designed for precisely adjusting the height of your riding position without changing the handlebar. Handlebar diameter: 31.8 mm.

Adjustable stem with oversize diameter (1.25"/31.8 mm) for added comfort.


28.6 mm (1 1/8") headset and OVERSIZE 31.8 mm (1 1/4") handlebar.

Optimized posture

60° adjustment possible for an individually adapted position.

Product Customer Reviews

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310 Reviews
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Adjustable Aheadset Oversize Stem,base color
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Handle bar extension

Very good product. Reasonably priced.

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Handlebar stem

This is excellent product,the build quality and finish is excellent, B'twin accessories and parts fit precisely like a glove.

Awesome product

Well designed and sturdy product. My backache problem gone instantly after using the product on my Montra Helicon


After suffering with backache due to the handlebars being too low I invested in a adjustable aheadset and have been reaping the benefit since. It has made a huge difference to my riding comfort and enjoyment without having to lengthen brake and gear cables.

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Met my requirements

Very well guided by the staff

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Stem is shaking and creaking even after adjusting.

Stem is shaking like anything, even after tightening it very tightly it I'm unable to stop it from moving. Even tried adjusting it from a Bike store. Still the same, I couldn't find any replacement for this.

Hi Atchut, 

Thanks for taking time out to review this product. We regret the negative experience you have had with this adjustable stem. The shaking of the stem could be due to the disparity between the handlebar size and the stem or the steerer tube. It could also be to due to a defect in this particular piece that you have purchased. We advise you to take the stem along with your cycle to the nearest Decathlon store for the Workshop technical team at the workshop to give you a solution. If the product is defective we will provide you an exchange.      

Well made and easy to install

Very simple to install onto a RockRider 560. I used a 5mm hex bit and an electric screwdriver to screw to the correct torque. Well made and works great!

Having trouble reaching the handbars ?

Search no more. This is the perfect product to increase the handlebar height and minimise the reach. I fitted it on to my Cannondale and I never had such a comfortable ride ever. It will make you want to ride your bike more.

Not good feels unsecure

i have had nothing but problems with this stem i have torqued all the bolts to the required level but there's still a lot of movement in the stem that feels unsafe tried different angles etc but no joy so have had to take off the bike.

Hello Mark,

Sorry to hear that your experience with this product hasn't been as you'd expected. I've fitted a few of these and not had any play within the stem. I'd suggest you take the item back for a return.

Rob Basnett b'Twin Product Expert DECATHLON
handlebar extension stem

Great product and fitted by a courteous and proficient assistant.

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Good Buy

Easy to Install. It fit my SCOTT Hybrid.

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Useful, quality item.

I bought this adjustable stem because I've been having trouble getting down on the drops on my road bike, hardly ever used them because I find it uncomfortable, (I'm getting old!!), solved the problem with this stem, raised the bars enough to make using the drops comfortable again. Very useful item, would recommend to anyone who struggles using their drop bars.

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Great price and sturdy

I am a time trial cyclist. Getting in position is a pain the butt. Buy one of these stems and you can mess with your position until you've got what you want. Then you can buy what suits.... Word

excellent product and easy to set up

Simple to use and gives a good range of adjustment

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Additional Product Information



  • 100% Aluminium 6061


  • 100% Steel



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
  1. product-research

    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

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual