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Btwin Oversize Bike Stem 35 mm 31.8 mm diameter

Sale price: $20.00 Regular price: $29.99

Bike stem compatible with oversize handlebars (31.8 mm diameter) to improve your position or comfort as you ride. The 35 mm length helps improve the maneuverability of your bike.

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Sale price: $20.00 Regular price: $29.99

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San Francisco, 735 Market St. Options

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Model: 8402831

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Product Features

A photo of the Btwin Oversize Bike Stem 35 mm 31.8 mm diameter in use

Btwin Oversize Bike Stem 35 mm 31.8 mm diameter | Designed for improving your comfort or position when cycling.

Bike stem compatible with oversize handlebars (31.8 mm diameter) to improve your position or comfort as you ride. The 35 mm length helps improve the maneuverability of your bike.


For 1”1/8 (28.6 mm) steerer tube and oversize handlebars (31.8 mm).


6061 aluminum.

Optimized posture

Available in 60 mm, 90 mm, and 100 mm.


4.5 oz.

Questions & Answers

Product Customer Reviews

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327 Reviews
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Btwin Oversize Bike Stem 35 mm 31.8 mm diameter,black
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Great product

I needed to reduce the reach on my handlebars and this was perfect. Fitted it quickly and easily and works brilliantly.

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Was needed

Original stem on my sons bike was too much of a stretch for me whenever I used his bike which is more often than he does so bought this to make life more comfortable

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Bought to shorten reach

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It does the job and is well made.

I got this stem about a year ago due to putting wider bars on my bike. A shorter stem really helped with the handling. The stem is minimalist, but strong. Someone else said that they wouldn't use this for mountain biking...well, I can tell you that this has been on my bike for a year, done countless trails from blue to black as well as plenty of dirt jumps. Don't worry, it's solid, just make sure you don't over torque the bolts. That's normally the reason for failure.

OK but with limitations.

Good stem that reduces reach and gives a more comfortable upright position. I would hesitate to put too much stress on the bars as the screws that hold bar clamps look undersized for the strain they are likely to experience. They also look too short and only engage the body to about half the depth of the holes. Bear in mind this is aluminium alloy and a small fine thread will strip easily if slightly over tightened or repeatedly turned. The trend may well be to slim down stems for appearance sake but I would prefer them to stay a bit more chunky for confidence. I would not use this stem on a mountain bike or with wide bars....probably OK for a trekking bike.

Exactly as expected

Fitted straight on to a Specialized Rockhopper Sport 2019 29" without any issues and has really sharpened up the handling against the 100mm standard stem, seems to be made well too, bolts went in nicely and torqued up without any roughness or cross threading

Lightweight and solid

Performs well for the price

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Outstanding for those who need the item

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Just buy it. You'll thank me.

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Short sturdy strong.

Replaced this for marlin yethi MTB for short stem and works like a charm.

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Served Me Well

Good product.

Oversize Bike Stem 35mm

Quality is good

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good form price point, only available 35mm stem in my city

Worth every penny!

high quality stem for short reach.

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Additional Product Information


Body: 100.0% Aluminium ; Screws: 100.0% Steel



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