The stem is the part of the bicycle that secures the handlebars to the fork.

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2
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2answers
1k views

Is there a difference between mountain and road stems?

I see them advertised as being good for one or the other. Is there really a difference? Or is it just a marketing gimmick?
1
vote
2answers
612 views

Upgrading my cockpit- brakes, stem and bars for longer reach

I want to upgrade my cockpit so that I have a longer reach. I currently use it as my city bike. Its an old vintage HR bates frame. Currently the stem is a little short. I want to change the bars - ...
2
votes
2answers
326 views

Rust proof or not the outside of a steel steerer column beneath the stem

I have a new steel frame which I am building up. I intend to rust proof this first by using Waxoyl made by Hammerite which I will use on the inside of the frame and forks. Should I use this on the ...
2
votes
3answers
3k views

Do all stems have the same stack height for the steerer tube clamp?

Does the height of the steerer tube clamp differ between stems, or is there one standard height used on all modern mountain bike stems? In my particular case I want to replace the stem on a mountain ...
4
votes
1answer
2k views

Geometry between 50mm stem and a 65mm stem and riding experience

Will I notice much difference beside just having a slightly longer cockpit between my seat and fork if I upgrade from a 50mm to a 65 mm stem? is this 15mm a significant enough adjustment to make my ...
4
votes
2answers
285 views

What brand is this handlebar stem?

I just purchased a used bike recently and I am curious to the make of my handlebar stem. Would anyone be able to identify the brand logo?
4
votes
2answers
1k views

How deep does a quill stem need to be inserted?

I have an old road bike with a quill stem and I want to raise the stem. After raising it to where I want it, the stem has about an inch between the high end of the expander nut and the top of the ...
3
votes
2answers
267 views

Front wheel getting misaligned while climbing hills

I've got a single speed bike with bullhorn handles. When I'm climbing steep hills I pull on the bullhorns quite hard, and once I'm back on a flat I'll occasionally find that the front wheel has become ...
2
votes
1answer
5k views

Measuring stem clamp / handlebar diameter

I have a new-ish Bianchi Cortina hybrid that I'm trying to find suitable drop bars for, but I can't figure out the proper size to get. It seems like the bars mostly come in 25.4mm, 26mm and 31.8mm. ...
8
votes
3answers
8k views

Attaching a stem to a carbon steerer: how much torque?

So I decided to travel with my bike this week and to my surprise discovered that the steerer is carbon fiber. I had removed the stem from the steerer for packing but naively assumed it was aluminum ...
2
votes
2answers
500 views

how much can i raise my stem?

I've got one of these stems: It's currently fully inserted into the bike, and it's too low for me. Can I simply loosen it, raise it 5cm and tighten it again? What's the minimum length that ...