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

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5answers
3k views

Deterrents against partial (component) theft

Big question: Is there any way to increase the security of bolted on portions of a bicycle? Specifics: I cycle as my primary mode of transport (in East London) on a early 90s steel road bike with ...
14
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1answer
6k views

How is stem length (reach) measured?

How is the length of a stem measured? Where does the measurement start and finish?
12
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1answer
7k views

What effect does changing the stem length have on my bikes handling

I'm finding that when jumping my mountain bike seems to be very nose heavy no matter how far back my saddle is. What effect will moving to a shorter stem length have? My bike, a Boardman FS-PRO came ...
11
votes
1answer
1k views

Is it okay to flip a stem

The stem on my bike is at roughly negative five degrees. If I were to flip it upside down, thus making it positive five degrees, might I be putting pressure on parts of it that were not designed for ...
9
votes
10answers
5k views

Is reversing the stem (pointing it backwards) a safe way to reduce reach length?

Assuming a steerer/fork/brake/cable setup that does not rely on the stem facing forward: is it safe to point a stem backwards as a way to reduce seat-to-bar reach (i.e. as a way to 'fit' a too-large ...
9
votes
3answers
3k views

Is it safe to use a spacer that reaches above the steerer tube?

I have a spacer that reaches from the top of the stem and over the top of the steerer tube. I am able to lock it down with the top cap, but I was wondering if it is safe to ride like this, or if I ...
9
votes
3answers
27k views

Better solution for uncomfortably low bars: a stem riser, or taller stem?

I've got my (threaded) stem at the maximum height, but I'd be more comfortable if the bars were higher relative to the seat. It would be uncomfortable to lower the seat any further. I was intrigued ...
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 ...
6
votes
2answers
5k views

What's the performance difference between a front-load and top-load bike stem?

I recently bought a bmx and after doing a few tricks on it, the front-load stem became loose enough for the bars to slide forward (they rotated towards me about the point the bars were connecting at ...
6
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1answer
402 views

How does a quill stem without a front bolt work?

Looking at quill stems I noticed this rather curious one and I couldn't imagine how it secured the handlebars without an apparent bolt. Any ideas? more images
6
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4answers
397 views

Creaking when in the saddle

I know there are about a million questions on here about creaking while pedaling, but I haven't seen one that relates...apologies if I missed one. I bought a 2011 BMC Streetracer SR02 last year; ...
5
votes
2answers
8k views

Is it possible to compensate a short sized frame by adjusting seatpost and stem?

Could you achieve the same position you would have on a bigger frame by raising seatpost and stem? And how could I adjust those to "simulate" a bigger sized frame?
5
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4answers
3k views

Bike is slightly too large, shorten the stem?

I feel that my bike frame is slightly too large because I'm stretching out quite a bit even when on the hoods. I'm considering swapping out my 90mm stem for a 35mm or 40mm stem It seems like these ...
5
votes
1answer
243 views

What are the advantages of handlebars with an integrated stem?

I was doing a bit of research for an upcoming handlebar purchase, and came across this strange piece of hardware -- handlebars with an integrated stem (or possibly a stem with integrated bars). So ...
4
votes
2answers
287 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
278 views

Front wheel lifting on climbs on my Mountain Bike

I've got a full suspension XC/AM 29er mountain bike (Gary Fisher Hi-Fi Pro). I'm running a size small frame with an 80mm stem with about 7 degree rise. Bike seems like a good fit for me. I do run the ...
4
votes
2answers
212 views

Installation of a shorter stem

I want to install a shorter stem onto my mountain bike, can I just swap them out or will I need to get the star nut replaced or reset?
4
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3answers
319 views

Would Lowering my Handlebars Help my Performance?

I ride now with pretty decent comfort, I have no real back/neck/shoulder pain. As I ride now I feel decent, but I feel as though I might be in too much of an upright position on the bike to get the ...
4
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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 ...
4
votes
2answers
252 views

Can I use a road bike stem on my mountain bike?

I've got a XC mtb which 1. I'm trying to cut the weight off , 2. I want a bit extra reach. I've got a longer road bike stem made by 'Deda' (I think Planet X)? and I was wondering if it will be strong ...
4
votes
4answers
7k views

Getting the right cockpit position. Sliding forward. What should I adjust to keep my sit bones on the seat?

I am experienced rider and I'm looking for some advice on how to adjust my cockpit position. I am a daily commuter, and do regular 40-50k rides on the weekends, and with the warmer weather will work ...
4
votes
2answers
2k views

Handlebar stem : height vs length

I want to decrease the reach of my handlebars. Does it matter whether I increase the height or get a stem with a smaller length(extension?) on my bike? And is there any way to calculate the relation ...
4
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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
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2answers
1k views

What would be the handling of a bike with reversed stem?

There are short and long stems: What effect does changing the stem length have on my bikes handling There are flat bars and there are curved back bars for comfort upright position: There even ...
3
votes
5answers
4k views

How do you make the handlebar stem straight?

I adjusted my stem height the other day, and since then, the stem hasn't felt straight. I've attempted to straighten it a few times, but because I'm just eyeballing it, the handlebars don't quite seem ...
3
votes
3answers
2k views

Pedals hits the ground too often while turning at relatively high speed

I’ve been riding for 40+ years of which the last 25 I’ve ridden Specialized. Around April last year I decided to replace my old bike with a brand new Sirrus Sport, on an XL frame. While I love the ...
3
votes
2answers
269 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 ...
3
votes
4answers
5k views

BMX stem slipping; how to stop?

I recently bought a BMX bike that currently has all stock parts. Recently, with the school and weather, I haven't been able to ride it that much. Anyways, when I picked it up from the shop, the bars ...
3
votes
2answers
2k views

Is it possible to replace a 1 1/8 steering tube with a 1"?

I have a 94 Giant ATX. Threaded 1 inch steeering tube. I need a shorter stem, and would also like to install a suspension fork. Is it doable? Could I take a modern suspension fork, heat the crown, ...
3
votes
3answers
1k views

Dropped the Wedge of a quill stem in the head tube

Trying to remove a seized quill stem and did a beginner's mistake of removing the stem bolt. I could not thread back the bolt. Is there a better way to thread back the bolt to the wedge for me to ...
3
votes
2answers
334 views

torque specification on headset

I was wondering why there is a torque specification on the steer tube end of the stem for mountainbikes. The torque specification that goes to the handlebar is reasonable, after all handlebars are ...
3
votes
1answer
2k views

How do I remove a quill stem?

(I recently got an old Favorit road bike (made in Czechoslovakia) and started restoring it. In order to give the frame a new coat of paint, I need to strip it down from everything.) I'm stuck with the ...
3
votes
2answers
887 views

New stem, bars & shifters on old Bridgestone 700

I recently bought a 1980's Bridgestone 700. I have trouble feeling confident on this bike between the narrow drop bars and the downtube shifter. This is my all-steel commuter and I'd like to put ...
3
votes
1answer
64 views

What fork size is 32mm (inside diameter on the frame) considered?

Good day, I'm new to the whole bike building process, but I've finally decided to make the step and build a semi-nice bike. I've bought a really nice aluminium frame 2nd hand, but its sizing has me ...
3
votes
1answer
139 views

Is a long, high angle stem safe to use with a carbon steerer?

I purchased a hardly used road bike someone else had built up for a deal a few weeks ago, and am a bit disappointed with the fit - it's fine for rides less than a couple hours, but too aggressive for ...
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 ...
2
votes
3answers
1k views

Replacing mountain bike bars & stem with drop bars

I have a mid-1990s Specialized Rockhopper. I've trashed the flat bars that were on it previously and I want to install drop bars, but to make that comfortable for me I'll want a shorter and higher ...
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. ...
2
votes
2answers
2k views

How can I move the handlebars on a mountain bike close to the rider without affecting handling and control?

I recently finished building up a mountain bike, with the help of a friend. My initial rides - a few miles, nothing too extensive yet - revealed that I need to move the handlebars a bit up and back ...
2
votes
2answers
330 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
2answers
510 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 ...
2
votes
2answers
78 views

French handlebar fit

I have an Atax stem ('85 Peugeot). Original steel handlebars are 25 mm. Is it prudent to spread the stem to accommodate Nitto 25.4 randonneur bars?
2
votes
1answer
69 views

Bar diameter for Genesis Croix de fer 20 (2015)

I would like to switch my stem for angle adjustable one and I am having trouble identifying the clamp size for the Gensis, Croix de Fer 20 (2015). I do not see the stem/bar clamp spec listed. There ...
2
votes
1answer
90 views

Another stem diameter question (French steerer)

The steerer in the French bike I'm restoring has about .2mm less diameter than "regular" ones. With some grease, I manage to fit the "regular" cinelli stem I will use into the steerer. (Mine is the ...
2
votes
1answer
305 views

Can´t remove BMX stem top cap bolt (won´t loosen)

I was trying to remove the handlebar and stem of my bike in order to be replace them. The bike has got a BMX stem and the top cap bolt is spinning freely in both clock and counterclockwise. Any idea ...
2
votes
1answer
296 views

Replacing stem on non-oversize bars

I have a road bike from Circa 2003 and it currently boasts an ITM Millenium stem. The stem is a bit long for my liking at around 130mm and I was thinking of replacing it with a shorter one for a ...
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
1answer
148 views

Switching from a quill stem to an stem adapter?

I have a bike I've owned for 15 years. The bike came with a quill stem, but now that I'm riding it more and more I want to buy a stem adapter. I'd like to raise the handle bar (presumably so I can ...
1
vote
2answers
332 views

25 degree rise stem vs 6 degree rise stem with taller head tube - how is handling affected?

All, I’m shopping for a new road bike with endurance geometry (more upright position and shorter top tube), 9mm drop saddle-to-bars. I’ve had a Guru fit done by a professional fitter. The main ...
1
vote
2answers
368 views

Screw cap stuck in adjustable stem connection, how to remove or reattach?

I was trying to detach my handlebar, because lowering was insufficient to make my bicycle fit in my box. I detached the long screw going connecting two lids thereby fastening the stem-handlebar ...