Questions tagged [carbon]

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

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1answer
529 views

Paint scratch or carbon crack?

I might just be overly paranoid, but does the line in the image (to the left of the glare) look like a paint scratch or could it be a sign of a spreading crack?
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2answers
1k views

Noticed a scratch on my carbon steerer, should I be worried?

Pictures: https://imgur.com/a/0cWtcsS My nail gets caught in the center and it feels sort of rough. I had my stem tightened at 4NM and the headset seemed to be properly adjusted. I have once ...
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2answers
2k views

Carbon Fibre Mountain Bikes

Has anyone had experience with carbon fiber mountain bikes? I'm still skeptical as to how robust they are. Is it true that a scratch will make the frame useless? And Trek has this process called OCLV ....
2
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1answer
88 views

Loose TT Bar Pads

I have Easton attack carbon TT bars which have pads that are riveted on. One has now come loose and is wobbly. I have tried to drill out and re-rivet them on but the problem comes back. Does anyone ...
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3answers
198 views

Is it cheaper to mass produce a carbon frame than an aluminium frame?

I've heard this comment but I have not found any information about it. Is it true?
11
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2answers
5k views

Crack in fork or just paint

Yesterday I saw something like a crack in the carbon fork of my roadbike. Now I don't have any clue if this is a really a crack or just the paint. Maybe someone can help me or tell me how to find out. ...
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4answers
7k views

Why do some road bikes cost more than motorbikes? Are they grossly overpriced? [closed]

I have seen quite some carbon fiber bikes that cost upwards of $4000. Why do these bikes cost so much when one can get a very good motorbike for $3000? A motorbike comes equipped with several ...
8
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3answers
3k views

Damping effects of carbon forks

Around where I live the common wisdom is that on a road, gravel or similar bike, a carbon fork will cushion some of the vibration more than a metal fork. On some web discussion forums I see that ...
4
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1answer
930 views

Carbon fiber crank arm with scratches--how much damage is a concern?

I have a compact SRAM red crankset with carbon fiber crank arms. On the left side, the outside coating on the end has chipped off from sometimes colliding with the ground while turning. At what ...
3
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2answers
84 views

Can’t find name of a product used in carbon fiber repairs

Several years ago, I watched a youtube tutorial about repairing carbon fiber. I can’t find that video now, but one of the first steps, before applying sheets of cabon fiber, the guy used a compound ...
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1answer
788 views

How to remove alu seat post from carbon frame?

My aluminium seat post is seized into my carbon frame. To make matters worse the seat post is snapped at the seat post collar - nasty crash. Anyone have a way to get it out? Or is it time for the ...
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3answers
368 views

Upgrading priorities

What is the first component upgrade to a 105 groupset? do I need to stick to Shimano? The crankset is Oval Concepts 520, forged 6066 arms, 52/36T. The bike a 2016 Fuji Altamira 1.3, STI 11 spd, ...
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2answers
3k views

Putting a front Derailleur on a carbon frame

Do you put anything under the clamp on the carbon to protect it? In the past I've tightened brakes on MTB handle bars to much and wrecked them so I'm wondering.
6
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1answer
12k views

Can I use brake pads for carbon wheels with aluminum wheels?

I bought a bicycle with carbon wheels, and for training I purchased an aluminum wheelset. I have SwissStop brake pads. Can I use them with aluminum wheels? I don't care much if these pads wear out ...
4
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2answers
1k views

How to secure a fully carbon (aero) bike when washing/repairing on a stand?

My bike is fully carbon (frame, seatpost, saddle etc...) and I clean it regularly. I have read/heard from multiple sources that you should not clamp carbon materials when using a bike stand. However, ...
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2answers
1k views

Carbon frame that is designed for strength and durability rather than lightness?

Are there such brands who have overbuilt carbon frame that is intended to last longer? Most if not all frames nowadays seem to always talk about being lighter stiffer, but I never seen one made to be ...
8
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5answers
4k views

Does anyone sell a direct-drive recumbent with no handlebars?

This document well describes the benefits of a direct-drive recumbent. Is there any carbon-frame recumbent, commercially available, that implements all its recommendations. And what are the pros and ...
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3answers
283 views

Can I upgrade my XC bike with a full-suspension, carbon fiber MTB frame?

I want to have a full-suspension bike, but since I already have a XC bike with very light, high-end components, I thought it might be cheaper to buy a new frame that supports rear suspension, buy a ...
1
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1answer
104 views

Clattering brakes on Liv Envie

My 2017 Liv Envie has 'V' style proprietary brakes (Giant Speed Control). Recently they've been making a clattering sounds when they engage the carbon wheel. This is happening on both the front and ...
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0answers
199 views

Click/snap sound while fastening brake lever onto carbon bar

I was fastening Shimano STI levers onto Bontrager carbon drop handlebars yesterday, with my torque wrench set at ~2nm, and heard a short rather loud click/snap sound shortly after starting to tighten, ...
8
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1answer
724 views

Do bikes with carbon frame get detected by induction loops?

Induction loops in my experience usually manage to detect bicycles with steel and aluminium frames. Do carbon frames also get detected? I'm wondering if a possible inability to trigger induction loops ...
1
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2answers
14k views

carbon frame chipped

today while I was riding I lost control of my bike; it was nothing serious, I even fell "standing", but my bike fell on a rock and the carbon frame was chipped. Should I worry about the damage? I ...
12
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4answers
14k views

Metal seat post with carbon fiber frame?

Is using a metal seat post on a carbon fiber frame advisable or not? I want to use a seat post mounted rack on my road bike (no regular rack mount points are on this bike), but I have been told that ...
12
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3answers
18k views

Why do bikes have carbon forks?

I have noticed many bikes for sale that are made of mostly one material, such as aluminum, except for the fork which is carbon. I know carbon is very expensive so the manufacturer must be trying to ...
2
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1answer
106 views

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 ...
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1answer
3k views

How to check carbon frame for cracks

Yesterday, a little boy hit my carbon framed road bike with his little bike while I was already standing. He was not very fast, the normal 'little-boy-dreaming-on-his-bike'-speed. So, nobody got hurt, ...
4
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1answer
1k views

Ritchey carbon MTB fork dropout wear

I was inspecting my carbon fork dropouts and I noticed the deformation of the edge on the outer side of the right dropout that makes me unhappy. I don't know what is the reason of this issue. Here are ...
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1answer
1k views

Would a carbon fiber fork make a significant difference?

I have a Giant Escape 2012 that i love. I ride it more than my road bike. Ive recently switched from 32mm to 28mm tires and can notice the improved handling and speed. Is a carbon fiber fork a good ...
0
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1answer
2k views

Differences between bikes 10 years ago and now?

I'm not too knowledgeable on high-end racing bikes, but I'm looking at getting a used Specialized Roubaix, and I was wondering whether enough significant advances have been made since 2007 to consider ...
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0answers
430 views

Is this MTB a good bike or a BSO? Deserve carbon MTB [closed]

A guy wants to sell it to me second-hand, according to him hardly used. He bought it for USD850, trying to sell it for USD 180 to me. Is it ok to buy? I'm worried because it's imported wholesale from ...
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1answer
1k views

What to do with scratched top tube on carbon fiber frame with no structural damage?

No physical damage, if i press into it nor while riding. I did wipe the surface to get rid of dirt and paint chip. Attached also a video to demonstrate the scratch. Should i put epoxy or tape or nail ...
8
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1answer
8k views

Do Carbon Wheels Stay True Longer Than Aluminum Wheels?

Does a race quality carbon wheel set stay true longer than an aluminum one (with equal abuse/mileage) ? It seems like the properties of carbon would resist flat spots and warping better than ...
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0answers
59 views

What is the best head set for a metal fork on a carbon frame? [closed]

I want to put a Chris King or cane Creek headset on a 29 inch carbon fiber frame using a rock shox SID fork. What is the best headset for this?
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2answers
7k views

Safest way to carry luggage on my carbon frame?

I'm planning a 5 day trip on my Trek Madone 4.5. We are planning on staying motels so don't need to carry camping equipment. I need to find some type of rack that is compatible with my carbon frame - ...
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2answers
3k views

How do you spot fake Campagnolo Bora's?

I have my eye on a set of second hand Campagnolo Bora Ultra two rims that are being sold by a friend for someone else. In South Africa the rims cost about +- R25 k (Rand is South Africa's currency) ...
4
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2answers
5k views

carbon seat post to carbon seat tube - necessary to loosen periodically to prevent seizing in place?

I recently (about 4 months ago) purchased a bike with a carbon frame (i.e. carbon seat tube) and a carbon seat post. I've read some nightmare stories about having to replace an entire carbon frame in ...
16
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5answers
12k views

How does stiffness in carbon frames increase speed?

I have a Specialized Roubaix with a 7r carbon frame; the Tarmac has 11r. Will I notice a speed change if I ride "exactly" under the same conditions? Does the additional 4r = more speed? I am thinking ...
9
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3answers
7k views

Can a carbon fiber mountain bike handle cool/cold weather?

It is late summer in the US and I am starting to look forward to autumn and winter mountain biking. I have a carbon fiber frame though. Didn't get to ride it last winter due to a broken collar bone (...
4
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4answers
981 views

How do different frame materials affect the handling of a bike?

I can appreciate that some materials are lighter than others and some have more flex than others, but overall, how do different frame materials affect handling of the bike? Assuming the same geometry ...
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6answers
5k views

Advice needed re Carbon Fiber vs Shocks

I am an occasional rider who bought my last bike 15 years ago (an all-aluminium Saracen with shocks). I've put about 400-500 miles this year and am thinking of taking up one of the Cycle to Work ...
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1answer
587 views

Aluminum alloy or carbon fibre handlebar? [closed]

Should I buy a carbon fibre handebar or an aluminium alloy one for a mountain bike? I would prefer the stiffest, as I do tricks but I don't really know which one is the stiffest. I seen both aluminum ...
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2answers
337 views

How to clean sticky brake dust from carbon fiber fork?

After having wiped by Specialized Langster 2017 carbon fiber fork with a water soaked cloth, there's still some sticky brake dust left. How do I remove that without harming the carbon fiber or the ...
4
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1answer
2k views

Carbon Fibre Frame Paint Chip from Stuck chain

My chain got stuck between smallest chainring and carbon fibre frame.. The paint chipped in one place and there is a half mm scratch in another place.. What is the chance that it damaged the carbon ...
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2answers
3k views

Chinese carbon clinchers - cheap but safe?

Ok. I won't mention links, ebay posts, or anything that may tempt you in any way, like I was. However, they are growing in popularity at my local and some guys swear by them. We all know buying local ...
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1answer
2k views

Maximum carbon steer tube length? [duplicate]

When cutting a 1-1/8" to 1-1/2" carbon steer tube, what is the maximum length you can leave outside the head tube and the stem clamp? Is there a maximum? How would you determine what the maximum steer ...
7
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1answer
467 views

Carbon Frame Ding

Today I had my Tarmac propped up against a rock wall and it slid down, scratching the paint/frame on the seat stay. I'm pretty new to carbon frames, and have heard they are relatively sturdy, but ...
2
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1answer
454 views

can I use an aluminium seatpost to install a tagalong on a carbon fiber frame?

I've been told not to put a tagalong on my carbon bike because the carbon seat post could crack because they aren't designed to withstand the lateral tension of having the tagalong mounted there. I'm ...
8
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1answer
5k views

carbon vs aluminium frame vibration absorption? bumpiness?

is there any data/measurements of any aluminium road bikes vs carbon road bikes wrt to vibration. it is widely stated that carbon is a smoother ride, but the best i can find out on the subject is ...
1
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1answer
295 views

What type of brake pads should I run on my Shimano RS80 C24 wheels?

I recently purchased a new (used) bike that has Shimano RS80 C24 wheels. The wheels say "carbon" on the side, though a couple of different sites indicate they feature a carbon and alloy laminate ...
29
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2answers
15k views

Road bike carbon fiber frame life span

I have read in several places that the carbon fiber has a shorter life span than the aluminium, and i was wondering just what would it be. I am not referring to accident related failures of the frame....