Questions tagged [carbon]

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

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2answers
452 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 ...
0
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2answers
80 views

Aluminium Aerobars on Carbon Handelbars

Since I want to build up a new bike with road or gravel handelbars and aerobars I try to get as much information about it as possible. Now I have just watched a video where the person in it says (at ...
3
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1answer
122 views

Are carbon fiber rims susceptible to fatigue?

While reading this question's take on the wearing out of aluminum rims used on bikes with disc brake systems, the inquiry was projected further to include carbon fiber, disc brake rims. Do carbon ...
5
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1answer
213 views

Cube stereo 150 race “do not clamp” warning

I have the following warning on my (carbon) CUBE stereo 150 race (2019) : Ultra thinwall tubeset DO NOT CLAMP Currently I clamp my bike like this, and make sure that there is nearly no force ...
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0answers
57 views

What weave is the carbon of this carbon wheel?

what weave is this carbon wheel? the brake track and rim are of different weaves? please explain, thanks.
8
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1answer
105 views

Is it necessary to reinforce a carbon fiber steer tube?

There seems to a belief circulating online that carbon fiber steer tubes need to be reinforced with the compression plug specifically underneath the clamp points of the stem. If this is true, why isn'...
3
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2answers
329 views

Carbon fiber fork scratched. Paint over or replace?

I'm new to carbon fiber in general. The other day my fork scraped up on some concrete. I'm not too worried if it's a scratch; however, I am worried if it means the fork is a goner. I've posted a ...
2
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1answer
141 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 ...
3
votes
1answer
150 views

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 ...
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1answer
83 views

What does MSL stand for with Rocky Mountain carbon bikes?

I see the carbon fiber bikes from Rocky Mountain bikes use MSL in their branding (up until 2016, at least). What for the letters stand for?
2
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1answer
68 views

Fork load capacity

I saw that the carbon fork of a bike has load capacity of 9 kg. Isn't it way too little? I assume my weight (and that of cargo) does not spread evenly 50/50 on front and back wheels but still, say the ...
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0answers
73 views

Carbon integrated seatpost small dent

I have a Ridley Noah frame that has a really small dent in the integrated seatpost, the dent itself does not seem to be caused by an object hitting it. It looks like it has been caused by hanging it ...
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0answers
175 views

A carbon fracture or a paint crack?

I’ve spotted this crack on my carbon fork, only on the left side. The crack is exactly at the joint of aluminum dropout and carbon body of the fork. My bike is a 2010 Trek Madone Project One (OCLV ...
3
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0answers
93 views

Mavic Cosmic SLS - carbon separation

Some aero’ wheels are an aluminium rim with a carbon fibre shroud. On a Mavic Cosmic SLS rear wheel, I’ve found that the carbon fibre shroud is separating from the aluminium rim. Just visible in the ...
2
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1answer
216 views

Damaged carbon fibre wheels

Can anybody tell me if you can repair a Wolber Carima carbon fibre wheel that has a chip on the rim?
2
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1answer
1k views

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?
4
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3answers
1k views

How to assess safety of carbon frame after crash?

I was recently hit by a car which pulled onto a roundabout. The driver hadn't seen me. The car hit me hard enough to actually snap the rim of my rear wheel. The bike has a carbon fibre frame and ...
5
votes
2answers
159 views

Which kind of test has bike parts to pass to be sold?

This is a question regarding bureaucracy/testing. What are the quality tests / standards that a bicycle and/or its parts need to pass before access the market? I am thinking about Germany/USA and ...
19
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1answer
5k views

Why can't a child bike seat be mounted on a carbon frame?

I have bought a BoBike junior bike seat for the rear of my bike which is a Cargo bike but the seat instruction says it can’t be mounted on carbon frames, baffles me as to why?
0
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1answer
78 views

Gates carbon drive on carbon frame

It is hard to prove non-existence, but as far as my research goes, there is no carbon frame available for belt drive systems like Gates. My guess is that this is due to the requirement to be able to ...
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2answers
123 views

How to judge grade of carbon frame?

Last weekend, a friend told me about a local bicycle shop(Metro Cycles) selling a Carbon Cycle of Hamilton brand. This brand is sort of known in India but only for cheap bicycles. Later I figured out ...
3
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2answers
250 views

Mavic wheels out of true after 200km, is normal?

I bought set of Mavic wheels, and today I noticed that the front and rear wheel is around 1,5mm out true after 200km of ride. Im curious whether it is normal. I have pair of those
4
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5answers
508 views

Is there any reason for the rear frame and bottom bracket to be asymmetric?

I just received a new non-brand carbon frame and immediately noticed that the bottom bracket looks to stick out significantly more to one side than the other, and the rear bottom forks also seem to be ...
2
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2answers
216 views

Is this cracked?

I am buying a bike from eBay and before I bid on it I just wanted to know what you though about one of the pictures. The bike is carbon and it looks like some paint has come off. What do you think ...
3
votes
1answer
208 views

Doubts about carbon fork condition

I've recently bought a second-hand Fuji Jari 1.7 (http://archive.fujibikes.com/2018/Fuji/jari-172). It's in good condition and works without problems, the only thing I'm slightly worried about is the ...
2
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2answers
531 views

Time trial carbon frame scratches. Should I concern?

While cleaning my time trial bike I've noticed many scratches in the frame. See pictures below. My tire pressure is usually around 100 psi, depending on the weather conditions or circuit. My wheels ...
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1answer
341 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
633 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 ...
2
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1answer
1k views

Are full carbon forks less prone to failing from hidden defects than those with alloy steerers?

Are full carbon forks less prone to failing from hidden defects than those with alloy steerers? Even though the mechanics couldn't find problems with Richard Stanton's bike, his fork failed ...
2
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3answers
152 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?
4
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1answer
391 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 ...
8
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3answers
2k 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 ...
11
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2answers
3k 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. ...
3
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2answers
70 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
348 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 ...
8
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7answers
6k views

Is it worth buying carbon fiber road bike for short commutes?

I'm planning to use a bike for rather short commutes (max half an hour), will the carbon fiber be noticeably more comfortable than aluminium one?
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3answers
192 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, ...
6
votes
1answer
8k 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
votes
2answers
301 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, ...
2
votes
1answer
73 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 ...
5
votes
2answers
884 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 ...
1
vote
1answer
87 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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3answers
268 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
vote
0answers
123 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
537 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 ...
3
votes
2answers
457 views

There don't seem to be many (or any?) carbon wheels for 9 speed bikes

I have a 9 speed Shimano Sora road bike and I would like to get some nicer wheels without upgrading the bike or anything else at the same time. Carbon wheels seem to mostly (or entirely) 10/11sp? ...
10
votes
3answers
11k 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 ...
1
vote
2answers
6k 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 ...
2
votes
1answer
92 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 ...
3
votes
1answer
2k 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, ...