Questions tagged [carbon]

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

Filter by
Sorted by
Tagged with
1
vote
1answer
67 views

Cosmetic or structural damage to Carbon Crank Arm

So I have a carbon fibre SLK Light Crankset and I managed to scratch up the right crank arm and the end has chipped off. I was wondering whether this is structural damage or cosmetic damage. It has ...
9
votes
1answer
804 views

What do I do when I am unsure if a carbon fiber component is safe to use or needs replacing or repairing?

Intended as a canonical answer to the many questions we have about damage to carbon parts. It is well known that carbon fiber parts can be damaged and fail, and carbon parts can be fragile when ...
3
votes
2answers
1k views

Chips in carbon frame - how worried should I be?

I am looking for a second hand road bike. This is to be my first mid-range bike, and my first introduction to carbon frames. I have done a bit of research, and am aware of the potential risks of ...
0
votes
0answers
67 views

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. ...
1
vote
1answer
116 views

Carbon or paint crack

Does this crack look cosmetic or structural to you? It's tiny hairline thick. UPDATE: I took the bike to trek store and their technician looked at it (I think he simply did tap test) and said he ...
4
votes
1answer
168 views

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 ...
2
votes
2answers
124 views

What should the torque of an expander plug in a carbon fork be?

What torque should be used for the expander plug in a carbon fork? This one shows 8NM, which seems high Manufacturers rarely seem to supply this information, yet tightening too much could damage the ...
3
votes
1answer
154 views

Is 2kg static cross-load dangerous for a carbon frame?

The bicycle is a carbon fiber cross-country machine. It is from a local manufacturer, not a well known one. Compared to other CF bikes but for more aggressive riding, when I knock on the tubes it ...
2
votes
3answers
136 views

Damaged Carbon Steerer Tube, repair/replacement?

I cracked the top of my 2007 Schwinn 1 1/8 fork black label steerer tube. What kinds of repair are available? Should I just buy a new name-brand carbon fork, e.g., Canondale, GT, Trek on ebay?
1
vote
0answers
81 views

manufacturing debris inside carbon fork steerer tube

I bought a 90mm compression plug so it would extend about 30mm into the bike's head-tube. But when the carbon steerer tube was cut to desired length, the compression plug could only be inserted to ...
8
votes
2answers
1k views

Frame dropout cracked, what can I do? (Allied Alfa Disc / carbon)

The frame thru axel hole/dropout cracked while using my wahoo kickr trainer. Is this crack dangerous? If it is, what can I do?
3
votes
1answer
119 views

Canyon ULT and Wahoo Kickr

Bought a wahoo Kickr in November and noticed a small chip to my canyon ultimate carbon frame. In January, Canyon announced the Ultimate was not compatible with Kickr. I'm dealing with Canyon and Wahoo,...
2
votes
1answer
125 views

Recommendation for Carbon Hybrid Bike [closed]

After some trial and error (see another post of mine), I finally settled in on getting a carbon hybrid bike. I want carbon because it is lighter and I want a hybrid because I prefer a flat bar (just ...
4
votes
1answer
52 views

Slotted or unslotted crown race with tapered carbon steerers

Does a tapered carbon steerer (40mm at the crown) typically require a slotted crown race if the steerer lacks an integrated bevel on which the lower bearing can rest? I have a Cane Creek Forty headset ...
2
votes
1answer
76 views

Product compatability (bottom bracket and frame)

I love biking, but I'm really no mechanic. I currently have a Shimano M6100 groupset (Deore) with me. A friend is going to give me a good deal on a carbon MTB frame, but I'm worried about ...
0
votes
3answers
142 views

Should an integrated crown race of an carbon fork be greased before assembly?

I'm assembling a 3T Exploro Team 2020. It seems like the fork has an integrated crown race. Should it be greased before assembly and pre-loading?
9
votes
2answers
523 views

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 ...
1
vote
2answers
156 views

Aerobar, why would carbon cost more than aluminum?

I think carbon parts are generally more expensive to their aluminum counterparts. I'm perplexed because aluminum version is cheaper and weighs less too? What am I missing? Example: Profile design ...
0
votes
0answers
94 views

Carbon fork crack?

I have aluminum bike with carbon fork, this is in the front of the carbon fork, it is in both sides of it? It's a carbon crack or paint crack?
1
vote
1answer
83 views

Maximum load of seat and quality of cheap carbon seats from China

I ride daily a single speed bike in the city, where is a lot of bumps, pothole etc. I would like to replace my current heavy seat (550g) for something very light. On eBay are available some cheap “...
1
vote
2answers
83 views

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 ...
2
votes
3answers
2k views

Does this carbon fork have a crack in it that would make you replace it?

Hello, I dropped the bike from standing and also had a front end collision later. The damage is from dropping the bike from standing because I can see the crack in a much older photo from after the ...
2
votes
2answers
228 views

To buy this damaged carbon bike or not?

I'm looking to get an MTB and have been looking for this particular one for quite a while but stock is hard to get hold of. I managed to find one in a store but the bike is damaged unfortuntely and ...
1
vote
1answer
179 views

Bikepacking With A Carbon Bike

I'm looking at doing a decently long bikepacking trip mostly on road. I currently have a carbon framed orbea avant endurance bike. I'd like to do the ride without necessarily buying a new bikepacking ...
6
votes
3answers
2k views

What's the best way to stow (winter storage) an all-carbon bike?

As the number of bikes in the house grows, storage becomes more of a problem. I have some hooks that I hang my touring bike and the gravel bike on (hanging from the front rim), but they both have ...
2
votes
1answer
93 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
123 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
votes
1answer
215 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 ...
-1
votes
1answer
1k 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
votes
1answer
77 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
votes
0answers
53 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
140 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
169 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 ...
3
votes
1answer
1k 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
416 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
votes
0answers
70 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
vote
1answer
201 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
votes
2answers
999 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
votes
0answers
154 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
781 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
votes
1answer
114 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
votes
1answer
173 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
votes
4answers
2k 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
398 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
92 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
1k 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
442 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
vote
5answers
678 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
votes
3answers
516 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
553 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
2 3 4 5