All Questions
66
questions
3
votes
1
answer
760
views
Wear marks on seat stay from fender/mudguard. Problem?
Mudguards have worn away where they contact the seat stay on carbon frame. A little deep, wondering if cosmetic or more serious. The one on the right stay doesn't look as deep but you can see 3 ...
- 31
1
vote
1
answer
109
views
Carbon frame damaged? [duplicate]
I had a crash a couple of weeks ago with my BH Quartz. The front wheel got caught in a crack in the road, I heard a crack and I fell on the side. I was worried that the frame cracked, but couldn't ...
- 11
-4
votes
1
answer
107
views
Is it possible to prove that applied forces to a top tube are worse than a seatpost when using a repair stand clamp?
This stems from the idea that you should use a bike stand clamp on a seatpost, if you can, for carbon fiber (CF) bike frames. Hopefully, this would avoid the cracking of a CF bike frame.
In order to ...
3
votes
2
answers
176
views
Carbon Damage on bridge, repair possible? If so, what steps are needed?
This is a follow up question to:
Attachmentpoint rim brakes carbon bike, sratches/crack?
So. My bridge on my x lite 4 seems to be delaminating. Unfortunately Rose does not want to honor their six year ...
- 191
3
votes
1
answer
254
views
Is the carbon frame disposal problematic
I heard from someone that carbon is difficult to dispose of. Does anyone know how
to dispose of carbon frames?
- 583
8
votes
2
answers
5k
views
Do carbon MTB frames crack easily?
I have been looking to buy a new full sus mtb (Vitus sommet 29 Cr) and saw that the main frame is carbon fibre with the rear triangle being aluminium. I love the bikes specs and aesthetics but can't ...
- 89
4
votes
3
answers
442
views
Carbon damage to frame after sideway fall
Today, I went out for a ride and had a small crash. I fell down sideways, then came home and realized there’s a small paint chip (which i’m fine with it) but there’s a small dot which is the deeper ...
- 43
3
votes
2
answers
1k
views
Worried about chip in carbon road bike frame
I am planning to get a second hand medium range road bike and this is the first full carbon road bike I'm getting. However, upon checking the bike, I can see there is a surface chipping on the top ...
- 133
9
votes
2
answers
1k
views
Carbon fiber frames and household heating/radiators: how close is too close?
I have a carbon fiber Giant Revolt that I keep in the hallway of my apartment, near the door. Opposite from where it's stored -- about 2.5-3 feet away, or one hallway width -- there is a hot-water ...
- 1,061
2
votes
1
answer
223
views
Chip in carbon seat tube?
I pulled out the seatpost on my Giant TCR and notice something like a chip in the seat tube, are defects like this normal?
- 21
3
votes
1
answer
278
views
How bad/deep is this chip on a carbon fiber bike frame?
Does it cut into the fiber or just some paint chip?
- 249
4
votes
4
answers
2k
views
Carbon damage assessment
Is it safe to ride? Will jb weld fill do the trick?
Seems like this damage was caused by a to wide tire rubbing the frame. I don’t see any fibers exposed to be honest(but I might not know what I’m ...
- 71
-1
votes
2
answers
98
views
can you tell me anything about this bike. frame/brakes, etc
my friend inherited this bike. curious what he has. thank you!
- 11
0
votes
1
answer
3k
views
Cracked carbon frame near seat post
A thick crack has appeared on the rear side of my carbon frame near the seat post. The crack formed after adjusting the seat post to the maximum recommended height.
How might this have happened?
Is ...
- 441
4
votes
2
answers
1k
views
How to restore broken rear disc brake mount in carbon frame?
Look at the image:
Bike model is Rocky Mountain Vertex 990. The frame is broken in a way that it's impossible to install rear disc brake. Possibly there may be a frame deformation. Is it even ...
- 153
7
votes
1
answer
6k
views
Chain damaged carbon frame. How to remedy?
During a recent fall, my chain came off my front chainring, and scratched up my frame. It looks to me like it's just the paint that's damaged but would appreciate a second opinion. The bike is a Trek ...
- 225
12
votes
4
answers
16k
views
Do I need to apply something on thru axle?
I've just bought my first carbon frame roadbike and realised that it has thru axle (previously I had quick release). Before I would do anything stupid, could someone give me advice if I should apply ...
- 809
0
votes
1
answer
303
views
0
votes
0
answers
105
views
carbon frame bike ktm revelator 4000 2017 damaged
KTM 2017 revelator 4000 in the bottom of the frame I have noticed this failure/puncture. Would you trust the damage here in the picture?
7
votes
2
answers
1k
views
Scratch or Crack?
I'm curious on opinions if this is a crack or a scratch. No crashes. No drops. Yes creaking.
- 71
2
votes
3
answers
415
views
Carbon fiber aesthetics vs. poor craftsmanship vs. possible repair? [duplicate]
Today a N.O.S. 2016 Stumpjumper FSR carbon frame set arrived, and I'm not impressed with some aspects of the way the carbon fiber front triangle appears. My CF experience is limited having only owned ...
- 11k
0
votes
0
answers
142
views
Carbon Specialized Sirrus X5.0 Help
I am very new to this thread and seeking help from an experienced bike enthusiast. I just purchased the aforementioned bike in the title and after bringing it home for inspection (bought brand new ...
6
votes
2
answers
2k
views
Is my carbon frame done?
I have a carbon trek Emonda bicycle. Today, my rear derailleur got caught in my wheel. As a result, the rear derailleur is bent, the rear derailleur hanger snapped off, the chain got twisted and the ...
- 277
8
votes
2
answers
2k
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?
- 223
3
votes
1
answer
419
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,...
5
votes
2
answers
6k
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 ...
- 183
4
votes
2
answers
547
views
Void in carbon frame seat tube, is it dangerous? [closed]
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 ...
- 41
4
votes
1
answer
815
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:
- 41
7
votes
2
answers
2k
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 ...
4
votes
3
answers
12k
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 ...
- 41
0
votes
2
answers
367
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 ...
- 101
4
votes
5
answers
2k
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 ...
- 41
2
votes
2
answers
816
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 ...
- 177
1
vote
1
answer
721
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?
- 13
2
votes
3
answers
280
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?
- 1,509
7
votes
7
answers
9k
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?
- 173
-1
votes
3
answers
315
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 ...
- 191
2
votes
2
answers
19k
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 ...
- 121
3
votes
1
answer
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, ...
- 809
4
votes
2
answers
8k
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 ...
- 887
4
votes
4
answers
1k
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 ...
- 1,831
7
votes
1
answer
611
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 ...
- 173
4
votes
3
answers
3k
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 ...
- 173
4
votes
4
answers
8k
views
Frame Or Paint Crack (Cannondale Super Six Carbon)
I am about to pull the trigger on a used 2012 Cannondale SuperSix bike. This would be my first bike and I'm very excited. However I am a bit concerned about some cracks. Seller claims paint is ...
4
votes
1
answer
733
views
Denied warranty claim on carbon bike due to impact?
I saw a little crack on the bottom section top tube of bike which is a kestrel talon. I took it the bike shop to see if it was covered under warranty. I have fallen once or twice from the bike but I ...
- 1,290
6
votes
2
answers
1k
views
Lugged carbon frame repair
In broad terms, I'm wondering if it is possible to repair a high quality lugged carbon frame, say a Colnago C60, that has been cracked in the top and/or down-tube.
Normally once a carbon frame has a ...
- 5,518
2
votes
1
answer
867
views
When to change road bike
I own this Fuij Roubaix 2008 model road bike, its an aluminium frame with carbon front and rear forks. I already did 25000km on the bike and replaced wheels, chainring, a couple of cassettes, chains ...
- 327
0
votes
2
answers
998
views
What are the advantages of having a aluminium frame? [duplicate]
are there any advantages that an aluminium body brings to the tables over carbon frames?
- 103
2
votes
1
answer
2k
views
chain stay protection on carbon frames
I am worrying about this type of protection against chain sucks. After 1-2 months with a new Cannondale F29 2, I've found out that this part was not where it should be. Instead, the chain did it's ...
- 696
0
votes
1
answer
118
views
How to exchange a seat stray on a 2013 Cube AMS 150 Super HPC Race carbon bike?
The derailleur was torn apart so I ordered new seat stays and have to exchange (one of them).
I'm not sure how to do it, there are some bearings fastened by screws where hex-wrenches seem to fit on ...
- 257