Questions tagged [carbon]

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

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3
votes
0answers
28 views

Need help understanding the components of a carbon fiber seat tube to properly unseize it

I recently picked up my first carbon fiber bike which has a carbon fiber seat post that seized to the frame due to rust. I did not initially think that was possible but after looking at it, I believe ...
1
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1answer
37 views

How can I safely clean Stan's tubeless tyre sealant from carbon rims?

I had a minor accident and spilled a lot of Stan's tubeless sealant on my carbon rims, which has unfortunately dried and become quite difficult to remove. What is the easiest and safest way to get ...
5
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2answers
98 views

How can I repair carbon damage near my bottom bracket?

I have had a few gnarly chain-drops that ate at my Open U.P. carbon frame. I thought I just had some chips in the carbon, but today I removed my crank for a full bike clean and realized that the ...
3
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0answers
77 views

Void in carbon frame seat tube, is it dangerous?

While assembling a carbon bike, I found this void in its seat tube. It's about 1/2 inch X 1/4 inch in size and I'm guessing almost a third to half the depth of the tube wall. Since it's right next ...
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1answer
76 views

Diagnosing and correcting hop on carbon wheel

NOTE - please read update below and all comments. I have a Mavic Cosmic carbon wheel which is perfectly true, but it has some vertical hop (3-4 mm). I thought at first that it was out of round, but ...
2
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4answers
723 views

MTB Weekend rider: step up to carbon worth it?

Target: weekend rider, cross country, enjoying technical sections, approx. 3hrs rides. Would like to improve MTB skills and spend more time on the trails. Current setup: Grand Canyon 4.0 2018, 13,3 ...
1
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3answers
186 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 ...
3
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0answers
85 views

Carbon frame chipped by chain - how to repair?

I found out my chain is damaging my frame near the cassette. How can I repair this? It was damaged by my cassette in the indoor trainer which I am not using anymore. This is how it looks:
2
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4answers
1k views

Scratch or damage on carbon frame

I found this 'scratch' on my carbon frame on top of the front derailleur. Not quite sure when or how it appeared. Could this be more than a scratch?
3
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2answers
93 views

Failure statistics of carbon fiber vs aluminum mountain bikes?

I've read a lot of carbon fiber vs aluminum debates. The anecdotal evidence for one being better than another is not very interesting to me. I'm interested in the statistics. Does anyone know where I ...
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1answer
76 views

Can I trust a carbon-fiber repair?

https://www.kijiji.ca/v-road-bike/city-of-toronto/felt-z4-carbon-road-bike/1497484952 That's the bike, I'm just concerned about the carbon frame repair. Seller said he did it himself and has done ...
7
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2answers
816 views

Cycled through pothole on carbon frame - damaged?

Yesterday while out on my daily exercise (I live in London) I had to cycle through a pothole (bus too close behind so couldn't swerve or stop) that jolted the whole bike. I then noticed a rattling ...
2
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2answers
126 views

Carbon bike for commuting - concerns about durability

I have been riding an aluminium frame hybrid bike for 20+ years and it is coming to the end of its life. Having tested a couple of carbon hybrid bikes and been very impressed with the responsiveness ...
4
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3answers
745 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? ...
2
votes
1answer
4k views

How to fit BB bearings to install Ultegra Crank on road bike Wilier Cento 1

I've bought a used Wilier Cento 1 carbon road bike frame (not the new Cento1SR, but the previous model). Now I would like to transfer all Ultegra 6700 groupset components from my existing bike to it. ...
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4answers
339 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 ...
4
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1answer
504 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 ...
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5answers
408 views

Carbon vs aluminium commuter for 50km per day [closed]

Is it worth it to purchase a carbon bike for commuting daily 50km. I'm thinking I would be faster and also be able to train on weekends for my first iron man this year. I don't have the funds to ...
4
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3answers
2k 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 ...
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3answers
146 views

Carbon wheels set or new groupset? [closed]

Currently, I'm running on Claris 3x8 speed drivetrain. I'm planning to either upgrade the groupset or a carbon wheelset. I dislike the groupset because of it's heavy and loud but usable but I want ...
3
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2answers
874 views

Cheap Carbon Fiber Wheels

Right, I guess inserting where they're made in the title would be a little politically incorrect but essentially the link below would give you the exact product that inspired the question :- Cheap ...
5
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2answers
468 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 ...
3
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1answer
140 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
340 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 ...
11
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6answers
71k views

What are the pros and cons between an aluminium and carbon frame?

I'm after a mountain bike and I've narrowed it down to the Cannondale F29 (based on reviews, plus I like the look of the bike). My question is, should I go for the carbon bike or the alloy bike? I'm ...
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0answers
61 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
159 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
votes
2answers
966 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
577 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
281 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 ...
16
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5answers
22k views

Should I grease a carbon fiber seat post?

I was reading a recent question when I saw this answer: You should absolutely grease your seatpost (unless it is carbon fiber). Why should I NOT grease a carbon fiber seat post?
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1answer
114 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?
4
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4answers
15k views

Should I worry about a chipped carbon mountain bike frame?

The other day while I was racing my Specialized Stumpjumper I noticed a chip on the frame. It's on the rear support bar right behind the seat post between the rear tire. My teammate who is a mechanic ...
2
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1answer
99 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
96 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 ...
2
votes
2answers
16k views

Aluminum forks vs. carbon forks (with aluminum frames) what are the trade offs? [duplicate]

The all-aluminum frame bike will be cheaper. The aluminum fork should be more robust and less prone to breakage. The carbon fork will be more shock absorbing and comfortable. That's kind of how I ...
3
votes
0answers
113 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 ...
11
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3answers
16k 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 ...
2
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1answer
478 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?
5
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2answers
172 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 ...
26
votes
11answers
51k views

Carbon bikes make me nervous. Can you ease the tension?

Is it only me, or do Carbon bikes make others nervous! I realize that carbon fibre is strong, but for some reason, having a bike that isn't made out of metal seems like asking for trouble. My main ...
19
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1answer
6k 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?
4
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3answers
2k views

Is it safe to use aluminium seatpost adapter (27.2mm to 31.6mm) for a carbon frame?

I have Cane Creek Thudbuster Seastpost (aluminium) 27.2mm x 400mm which i want to use for a bike with a carbon frame (31.6mm seat-tube). I'm thinking about getting a seatpost adapter/shim from 27.2mm ...
4
votes
5answers
629 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 ...
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2answers
150 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
votes
2answers
321 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
8
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7answers
7k 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?
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
votes
2answers
244 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 ...