Questions tagged [stem]

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

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4 votes
1 answer
394 views

Is it possible to use a 26mm clamp diameter stem with a 24mm handlebar?

I am considering getting a stem, which is meant for a 26mm grip area diameter. However, the handlebar I want to use it with is 24mm diameter (this diameter is uniform, so 24mm both at the grip and at ...
2 votes
2 answers
319 views

Some spacers on top of stem or all under?

Is there a big difference between having like a few spacers on top of the stem and then a few on the bottom compared to placing all of them at the bottom? Or is this just personal preference. Asking ...
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2 votes
2 answers
131 views

Easily misaligned handlebars when using stem raiser

I use a Delta Stem Raiser (maybe also called a stem extender, handlebar riser, steerer tube extender) to make my handlebars "taller" (higher up than they could typically go) on my bike's ...
0 votes
2 answers
123 views

Are they called handlebar "upsweep" and "backsweep" because only one quadrant is usable?

The title says it all. Are the two rotations of MTB flat bars (question updated in italics) called "upsweep" and "backsweep" because only one quadrant is usable? Is there never a ...
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3 votes
2 answers
69 views

Dunlop valve stem problem

I got new Dunlop valves (modern) to replace the damaged Dunlop valves for both the front and rear tires. The valve replacement was easy for the front tire. But for some reason when it comes to rear ...
4 votes
1 answer
232 views

What kind of load should I put on in simulation if I were to design a stem in CAD?

I am planning to build a steel bike myself and want to pair it with a custom stem. I came across someone selling 3d printed stems in my area. So I decided to design myself a stem that is compatible ...
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6 votes
4 answers
331 views

How does this stem/headset work?

I have a bicycle (Göricke, circa. 2012) with an unusual stem. It appears to have a quick-release nut which can rotate through a quarter turn. Here is a picture, with the dust cap removed: I would ...
8 votes
1 answer
189 views

Do bicycle stems have certified usage ratings (road/XC/Enduro/DH)?

Clamping dimensions aside, are all stems rated for all the cycling disciplines, especially in the MTB domain? In other words, are stem manufacturers liable to guarantee their products to be safe to ...
4 votes
1 answer
94 views

How many spacers can I place above the stem on an alloy steerer tube?

I installed a new stem with different height to the previous one and now would have to place two spacers above it to make it adjustable. As the stem is clamping full height to the steerer tube I think ...
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8 votes
2 answers
892 views

What makes a stem a "mountain bike stem" and why might it not be suitable for (or clamp properly on) a road bike?

I am about to purchase a stem labeled "Mountain Stem" with the two diameters: 1-1/8" steerer 31.8mm bar clamp to install on a road bike. There is stock of "road bike stems", ...
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4 votes
1 answer
83 views

What is caad13 compression plug torque?

I tried to find it online but I couldn't. I'd like to know recommended top cap torque too.
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2 votes
1 answer
242 views

Is this damage on this stem faceplate screw threads a safety issue?

I had to adjust a handle bar of an older road bike I want to start using again. When unscrewing the handle bar to stem bolts I noticed that the washers had grinded into the aluminium already. As I had ...
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4 votes
3 answers
313 views

Question about stem play

I screwed the top cap screw clockwise to remove play in the stem but I wonder if the stem has to be never moving or theres a point the headset is softly moving like rubber I assume bearing is still ...
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1 vote
1 answer
63 views

Where do I locate/install the compression plug for my stem in my carbon steer tube?

I have Cannondale Si compression plug with flat top cap and I am using a Bontragar Blender Pro stem on my CADD 13. I wondered how I should locate my compression plug within the carbon steerer tube of ...
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2 votes
1 answer
113 views

Do you move compresser plug when you lower the stem position

When steerer tube hadn't been cut and put spacers above the stem but compresser plug would stay the same position.
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2 votes
2 answers
146 views

Cutting a slot in a quil stem

Just curious to know, is it possible and safe to cut this slotted part of the stem and make a new slot slot on top? I need a shorter stem for another project.
5 votes
3 answers
553 views

How do I install a quill stem extender?

I don’t understand how to install a quill stem extender. Photo included. I have my stem, the long screw and the wedge. The stem extender on the right has a stem, a long screw, and a wedge. The screws ...
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7 votes
3 answers
152 views

Will it be effective to use hot water and cold canned air to unjam a quill stem?

I have a bike frame that has been left outside for years, I tried to remove the stem by hitting the bolt with a hammer, using rust dissolver. I achieved nothing. We use a torch and water where I work ...
1 vote
1 answer
47 views

How do I center a basket attachment that's sitting between the stem and head tube

I messed up while building my daughter's bike and started turning this basket attachment around, until I realized I am looking at it from the wrong side. Now it's sitting at an angle. What tool ...
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6 votes
2 answers
164 views

Why are thorn resistant tubes prone to valve stem failures?

I would welcome knowledgeable answers rather than opinions please. I have been cycling 50+ years and now work in an LBS. I have seen numerous examples of so-called “thorn-proof” TP tubes, of different ...
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2 votes
1 answer
231 views

How do I remove the stem/fork on this style of vintage bike?

Picked up a cheap vintage bike, and I'm getting it ready for a family member to ride. I want to put a different stem/handlebars; but I'm unable to back out the quill to remove the stem. In checking ...
3 votes
3 answers
2k views

Ways to increase handlebar height?

Recently got my first bike with drop handlebars. After riding around for a while, I noticed some neck/trap/shoulder strain. I have tried adjusting the seat height, but I think the next best solution ...
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5 votes
2 answers
576 views

What's the ideal balance (forward/backward) in the saddle on an endurance road bike?

I got my first road bike (and found I favor endurance riding position), and I can't figure out if I'm positioned well in the saddle. It's as far aft as it goes, but I still feel like I'm falling ...
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0 votes
1 answer
183 views

Slamming my stem considerations

I want to try a slammed stem but don't want to cut the steerer tube. Do I have to?
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8 votes
5 answers
3k views

How can I raise my handlebars when there are no spacers above the stem?

I have a threadless setup with no spacers above the stem. What is the simplest way to raise my handlebars?
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1 vote
1 answer
371 views

Is this an integrated crown race?

The title says it all. I would like to change the bearings for my headset,but i have no idea if this crown race is removable. It is a Bontrager fork, probably from 2007. Thank you, From Norway.
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2 votes
2 answers
367 views

Zero-gap stem (FSA Afterburner) inverted installation

My question is somewhat related to this one. I apologize in advance for such a long question! And thanks to everyone who manages to get to the end. I've bought an FSA Afterburner 12° stem. On the ...
0 votes
1 answer
105 views

How to adjust when i am 5'5 foot tall and having a 42 cm roadbike frame?

Im planning to buy a roadbike frameset in my local store but they say that the size of the frame is 42cm and i am 5'5 should i buy that frame?
6 votes
5 answers
1k views

PRO LT Handlebar Stem asks to tighten top handlebar screws first before bottom screws? Conflicting manual instructions?

I bought this PRO (Shimano) LT handlebar stem. However, I'm having difficulty decoding the instructions in which to tighten the handlebar clamps. The stem itself has this piece of cardboard in between ...
8 votes
4 answers
734 views

Handlebar slips in quill stem clamp when going over bumps

I bought this new Kalloy quill stem, with Sakae 25.4mm handlebars as pictured below. The handlebars were purchased at an eBay auction. Here's the setup from the side I've tightened the handlebar ...
2 votes
1 answer
319 views

How to Remove This Fork?

I'm restoring another old bike of mine (20 y.o). Want to repaint the bike, but I need to remove all the parts. Trying to remove the old rusty fork but have no idea how to do it. I tried to remove the ...
10 votes
2 answers
700 views

Is stem cap redundant after tightening stem bolts?

Is it right to think that after the preload is set, and the stem bolts are tightened, the stem cap becomes redundant? Will the preload be held fixed by the stem? If so, does that mean the stem cap can ...
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4 votes
6 answers
1k views

I stripped one of four bolts on the faceplate of my stem. Is the stem usable until the replacement arrives?

The aluminium stem on my road bike says the max torque for each of the four faceplate bolts is 6nm. So I set my calibrated torque wrench to 6nm... and one of the bolts stripped its thread. I guess “...
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2 votes
1 answer
278 views

Are Adjustable Stems With Reasonable Merit?

[Question overhauled after I realised it appeared snobbish, narrow and not in good faith, as pointed out by @gschenk . This sentiment originated due to a recent failure with a critical bolt mechanism ...
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0 votes
0 answers
80 views

What Dahon adjustable handlebar stem would suit my Dahon MU XL Sport Bike

I own Dahon Mu xL Sport foldable bike and use it for exercise. I have a back problem and would like to fit a Dahon adjustable stem to keep my riding position more upright. I have tried adjusting the ...
1 vote
2 answers
208 views

Negative 17 80mm stem on MTB?

I currently have a 27.5 hardtail mtb. I use it for commutes and traveling rather than trails or downhill tracks. I'm planning on upgrading some parts and one of them is the stem. Will a -17° stem have ...
1 vote
0 answers
295 views

Adjustable Andros-like stem for 31.8 handlebar

I have used the Tern Andros stem system and got one with it well. Recently I acquired a Riese and Muller folding bike, which has an adjustment system which (for me) is less comfortable. It puts the ...
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1 vote
0 answers
85 views

Can a 2cm lower ETT and 3cm lower stack make a big difference

I have recently been testing two mountain bikes: one with a 44cm (~17.5") frame, which I bought second-hand and one with a 45.7cm frame (~18"), which I bought new but want to return it as I ...
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8 votes
3 answers
2k views

Why the small difference between common sizes of handlebars (31.8mm) and MTB seatposts (31.6mm)?

Many handlebars have a 31.8mm clamp section, and a common MTB seatpost size is 31.6mm. I know these are both around 1 1/4 inches. Why the 0.2mm difference though?
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1 vote
1 answer
136 views

What's the generic name for this threaded/decorative "stem cap" on a Delta threadless steer tube extender

I picked up one of these Delta threadless stem risers / steer tube extenders so I could try out different handle bars heights on my gravel bike without going through a bunch of stems (since shops near ...
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3 votes
2 answers
216 views

Is it possible to set this fork steerer / stem higher?

Is it possible to set the stem / steerer higher in Cannondale R300? It feels like I need higher stack and I wouldn't like to tilt the drop bars from their current position. Bonus question: are stem ...
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2 votes
1 answer
1k views

Carbon steerer with expander plug under the stem, should I be worried?

I just bought a custom fixed gear frame that comes with a carbon fork with carbon steerer, off a guy who already cut the steerer lower than the stem so that the cap can sit flush on the stem. Normally ...
2 votes
1 answer
241 views

Quill stem bolt is covered

I've just got a new bike (ordered online). It came all assemebled except for the handlebar stem (quill type) which is completely sideways. I believe I need to loosen the stem bolt and reorient it, ...
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3 votes
1 answer
2k views

Replacing stem bolts

Rather than replace the stem on every rusty bike I come across, I want to replace some stem bolts which are rusted, cheap original ones. I know they can differ in size a bit so I would get some that ...
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0 votes
1 answer
68 views

What brand is this stem?

Just wondering if anyone can identify the logo of the brand on this stem, thanks.
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2 votes
1 answer
175 views

Adjustable stem busted - Do I need to replace the whole stem?

Today on my 2018 Pegasus Solero the adjustable stem broke. Probably due to overtightening of the righthand screw the nut at the left side of the stem tore free (see images). The question is, whether ...
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4 votes
1 answer
4k views

Clarification on the steerer tube torque of the stem bolts

On my stem a label says "All max. 8 Nm" next to the handlebar clamp bolts. This is the only labeling: On the internet I found other values ranging from 20 - 30 or even 10 - 30. Refer to: This ...
5 votes
2 answers
645 views

Threadless stem keeps loosening [duplicate]

I recently got a 2018 Felt VR30. I've been riding for a long time, but this is the first bike I've ever had with a carbon fork, and only the second I've had with a threadless headset. The problem I'm ...
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3 votes
2 answers
2k views

Effects of longer and higher stem on rider position/comfort and handling

My first road bike, and the bars feel a little low and a little close. What would be the effects of switching to a stem that is 10-20mm longer, and either the same angle so the bars are slightly ...
3 votes
1 answer
3k views

Tightening steerer expander/compressor and spacer positions with a carbon fork

I had ugly clicking noises coming from the headset before and after a warranty exchange of a fork (the reason for the exchange was on the other end). I have identified the clicking as coming from the ...