Bicycles Stack Exchange
Bicycles Stack Exchange

Questions tagged [carbon]

Frames or components made from carbon fiber, possibly even about carbon accessories.

297 questions
17
votes
1 answer

Difference between UD, 3K and 12K carbon finish?

What does UD, 3K, 12K carbon mean and how do they differ?
Jerryno
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16
votes
5 answers

Should I avoid sitting on top tube on my carbon bike?

In another bicycle discussion forum I encountered a thread about possibility to damage carbon frame by sitting on top tube while stopped. I see some sense in it, as generally tube walls are a lot thinner in the middle to save weight and are not…
Papuass
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9
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2 answers

Are these shallow gouges and imperfections on a new carbon fork steerer benign or serious?

I have never had a carbon component on any of my bikes, so I have no idea what sorts of imperfections are perfectly normal minor blemishes that pose no risk. I'm building the bike for a family member and don't want to install anything…
Tim
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7
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4 answers

Weird discolouration of carbon frame

I bought a used BMC Granfondo 01 which has a carbon frame. The frame is solid (no chips or cracks), but it's full of weird discolouration. It looks like there were be stickers in the places where discolouration appeared. The paint is solid in the…
Taks
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7
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1 answer

Carbon Wheel Heat Bending

After riding about 800m downhill, I got this: BTW, this is TriAce Wheelset for Dahon Mu Ex 2014. Do you think this is safe to ride? Can I repair this?
Sung Kim
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6
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3 answers

drilling hole in carbon frame

I would like to upgrade a carbon fiber bike (Scott CR1) to Ultegra Di2 with internal wiring. Can I drill a hole where the cable holders are located (one next to the fork, one near the bottom crank & one at the rear, close to the derailleur) in order…
jnoel
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4
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1 answer

Matt black carbon bike

Just want to ask about the finish of matt black carbon bike. I bought a brand new specialized carbon bike. And the surfaces are like the images. I thought it’s kind of smudges or smears that could be left or made in assembling in the bike shop. When…
Jin
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3
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1 answer

Carbon frame damage from chain

Sustained some damage from a chain coming off, and it's done some rather nasty damage to the paint, frame itself looks OK? Other bikes I own have a metal plate here to protect the frame, is this not standard? Feels and sounds solid, is it still OK…
William Oakley
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3
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1 answer

Carbon frame damage

Please help. What should I do? I just bought a full carbon road bike that is less than 30 days old and noticed a hairline glitch where the seat post and seat stay meet that I can feel with my fingernail. It is about 3/4 of an inch long. Similar…
Kent
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2
votes
2 answers

Can metal polish damage carbon frames?

I have found a PUROL metal polish lying on one of my shelves and I was wondering if you can in any way damage a carbon bicycle frame by using this polish on it. The only thing stated on the tube is that, apart from metals, it can also be used on…
Nejc Kejzar
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2
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1 answer

Is this a crack on the carbon frame?

I have just noticed this on the top of my saddle bar and where the seat post clamp is. Is it a crack probably caused by the saddle pressure?
Amir
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2
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1 answer

How to clean an stone-stricken carbon MTB without doing damage to the carbon....?

My carbon MTB have got some damage (not cracks) to the paint from stones from the wheels, so I want to clean the damaged specks out, and put on som protection. First of all, will it damage the carbon if I clean out the specks with benzine or oil,…
Easer
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1
vote
1 answer

Are racquets' graphite the same substance as bike frames' carbon?

One of the materials used for tennis/squash/pickleball/... racquets is graphite. One of the materials used for bike frames (and components) is carbon. I gather that both have the element Carbon in them, but that they could be as distinct as the…
Sam7919
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1
vote
2 answers

Saddlebag clamp on carbon seat post?

I think Mr. Fusion seems perfect, except they don't recommend it for carbon seatposts https://porcelainrocket.com/collections/store/products/mr-fusion Q : Why is Mr. Fusion not recommended for carbon seatposts? A : Some folks tend to get a bit…
eugene
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0
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0 answers

Are these scratches at carbon fiber something to worry?

the seller showed me all the scratches at the bike and told that they happened when he was carrying bike and & changing rear wheel all the time. I did not notice any other scratches at the frame. All of these are around rear wheel hub. Are they…
emibike
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