Questions tagged [carbon]

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

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2
votes
1answer
80 views

Seatpost mounted luggage rack on carbon frame

Planning on taking my carbon Ribble to Wales to go play in the valleys. Need to carry limited luggage from point to point. Looking at a seatpost mounted rack like the Topeak RX beam, but wanted ...
4
votes
4answers
105 views

Bottle Cage Mount on Carbon Bike

I have fitted a frame bag to my carbon bike frame so I have lost my water bottle mounts. As it's carbon frame I'm aware that you can't mount clamps on the carbon like you would for steel. However, I ...
3
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1answer
89 views

Carbon steerer tube scratch (inside the tube) - how bad is it?

Today I looked into my steerer tube and saw this: Since Im new to carbon frame, I cannot decide if this is a serious problem which has to be fixed asap, or just a minor scratch on the surface. It ...
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1answer
303 views

Canyon Endurace CF SL Disc: 7.0 vs 8.0 [closed]

Mission: On the market for a new road bicycle. Since May 2020 I stepped up my cycling and will probably at least triple the yearly kilometres (3k?). So I want to treat myself and I decided to invest a ...
3
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1answer
72 views

What do these rim numbers mean?

I just noticed these numbers on the inside of my Reynolds AR58 carbon wheel (see picture). The left paragraph seems to provide information about the product and manufacturing date/place. Does anybody ...
0
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0answers
52 views

How to mount bike rack on Lemond Versailles (carbon fiber, no rack mounts)? [duplicate]

I considered clamping an attachment point, but it's not recommended for carbon fiber and the clamp is too small to attach to the metal point at the end (bottom in the photo). Seat post is carbon fiber....
2
votes
2answers
125 views

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 ...
2
votes
1answer
118 views

Too heavy for Trek Checkpoint SL5?

I've been doing some reading about all-road / adventure-ready bikes and I'm leaning toward the Trek SL5. I weigh 265lbs and the official specs say the total weight limit for bike, rider, and cargo is ...
2
votes
1answer
186 views

Carbon taperd road fork - use crown race or not?

I have a 2016 Trek Emonda ALR 5 with a carbon fork. I am assembling the bike after general maintenance, and have noticed that I am missing (or: think I'm missing = am not sure) a crown race for the ...
1
vote
1answer
139 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 ...
3
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0answers
63 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
56 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
227 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
97 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 ...
2
votes
4answers
742 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 ...
0
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1answer
86 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 ...
4
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0answers
103 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
votes
2answers
133 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 ...
1
vote
1answer
83 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
votes
2answers
908 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
votes
2answers
206 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 ...
1
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5answers
486 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 ...
0
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3answers
273 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 ...
5
votes
2answers
503 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 ...
1
vote
4answers
728 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
votes
1answer
151 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
votes
1answer
431 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
62 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
244 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
2k 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
votes
1answer
923 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
374 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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2answers
163 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
votes
1answer
139 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 ...
1
vote
0answers
129 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 ...
4
votes
1answer
793 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
votes
0answers
132 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
votes
1answer
660 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
votes
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
votes
3answers
4k 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
189 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
votes
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?
1
vote
3answers
270 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 ...
0
votes
2answers
183 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
363 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
votes
5answers
755 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
votes
2answers
274 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
367 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
votes
2answers
597 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 ...