Alloy / Carbon Fiber Frame

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cyclebeatz

Regular
Hi there,


I am about to buy my first road bike and normally I
wanted grab a carbon bike until I saw this video about it:




Is this 100% sure about what he say in this video?
I mean carbon breaks , alloy breaks and steel too right?

It's easy to show some movies and pictures about broken carbon stuff
and telling then the stuff is shoot. It would be the same to snow broken
alloy or steel parts who broken while cycling right?

If carbon is so shitty why its used everywhere in mountain bikes?
I mean, these bikes need to be very strong for all these crazy stunts
and mountain rides right? If there breaks something, then its hospital time...

Is it not all about what kind of carbon it is?
and not the matter of fact that it is carbon?

Same with steel there are good ones and bad ones
and if someone use bad ones then they break faster as usally....


Here is a test I found - carbon vs. alloy:




I am just curious and new to the cycle world
and want be 100% sure I do the right thing.


The test looks pretty interesting and shows that
alloy breaks faster then carbon...

And then there are videos where you can see
how easy carbon can breaks:







I think its not because its carbon that its all breaks same easy way - its about what kind of
stuff is used and how strong the carbon is in the frame or whatever part of the bike or I am wrong?

It must be like this.. Why else company's would
use a weak stuff who breaks after one impact?

it could be the end if someone would use a carbon frame
and jump from a mountain and break his head.

Ofc alloy is much cheaper and there are some frames
who are also so lightweight as carbon and the money can be
saved for other things as buying overpriced carbon frames.

I think, there are different types of carbon. Weak and powerful frames.
Carbon is not carbon if I see it right and you can get a cheap carbon frame
or a expensive frame who is very very strong.

I would like to read what the experts say about this.

I has read some very scary crash stories in the first
video at the very top from people who had crashes on carbon fiber frames.



Here are some other videos I found on YouTube:














cyclebeatz
 
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kalniel

kalniel

Well-Known Member
Location
Herts
What will you be using it for?
 
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cyclebeatz

Regular
I will using it for road cycling but thats not the question.
The question is, is carbon really that bad like everyone says?

If its so bad why its used at all the mountain bikes and why there are test where carbon it so farking strong and in other test / reports it breaks and explode just by falling down or by one impact?
 
kalniel

kalniel

Well-Known Member
Location
Herts
cyclebeatz said:
I will using it for road cycling but thats not the question.
The question is, is carbon really that bad like everyone says?
Click to expand...
Well it is kind of the question if you're asking with regard to buying a bike.

If its so bad why its used at all the mountain bikes and why there are test where carbon it so farking strong and in other test / reports it breaks and explode just by falling down or by one impact?
Click to expand...
Some carbon is good and some carbon is bad. Some uses are more demanding than others.

In all the cases where it failed you'll have to examine what carbon it was, and what usage was it that caused it to fail. If those uses align with yours then you'll have to make sure not to get that carbon/design. But so far I think I see time trails, tour de france sprinting and application of tools/jumping onto frames, none of those would seem to match your uses so you're probably all right.
 
Citius

Citius

Guest
cyclebeatz said:
I will using it for road cycling but thats not the question.
The question is, is carbon really that bad like everyone says?

If its so bad why its used at all the mountain bikes and why there are test where carbon it so farking strong and in other test / reports it breaks and explode just by falling down or by one impact?
Click to expand...

Sounds like you are arguing against yourself here. If carbon fibre was not a viable construction material, then it would not be routinely used for the production of bicycle frames, or F1 chassis, or aircraft airframes, or thousands of other safety critical components.
 
PhilDawson8270

PhilDawson8270

Veteran
In normal use it is no different to any other material, but there are things you need to be more aware of with carbon than with an alloy frame.

For example, transport methods, clamping for maintenance, etc. Not worse, but can certainly require "different" methods.
 
HarryTheDog

HarryTheDog

Guru
Location
Basildon Essex
I thought the normal way to look at carbon is its very strong against the direction of forces/impacts applied to it that it is designed to do, can be fairly weak against forces from directions it is not designed to take forces/impacts from. If you are intending to have a lot of crashes and want to jump up and down on your frame or hit it with a hammer than best buy steel. I have both MTB and Carbon road frames all still in one bit after years of bashing. Sure it breaks my daughter frame cracked within a week but that was a 30 mph finish line multiple pile up.
 
Citius

Citius

Guest
HarryTheDog said:
Sure it breaks my daughter frame cracked within a week but that was a 30 mph finish line multiple pile up.
Click to expand...

I bent a steel frame many years ago, after a finish line crash, which also broke my collarbone. The collarbone repaired itself free of charge (with some NHS input), and my frame builder simply replaced the down tube and the bike was good to go again. If a carbon frame breaks like that, it's generally the end of the line. That's progress.
 
HarryTheDog

HarryTheDog

Guru
Location
Basildon Essex
Carbon frames can be quite easily fixed, my daughters frame cracked through the seatstay , fixed proffesionally ( HQ fibre products Norwich) for 150 quid, good as new. ( did help it is a matt black frame). The bloke who fixed it fixes carbon wheels as well . He showed me pictures of stuff he has repaired you would have not thought possible and the reair can be stronger than the original .
 
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cyclebeatz

Regular
kalniel said:
Well it is kind of the question if you're asking with regard to buying a bike.


Some carbon is good and some carbon is bad. Some uses are more demanding than others.

In all the cases where it failed you'll have to examine what carbon it was, and what usage was it that caused it to fail. If those uses align with yours then you'll have to make sure not to get that carbon/design. But so far I think I see time trails, tour de france sprinting and application of tools/jumping onto frames, none of those would seem to match your uses so you're probably all right.
Click to expand...


Okay this is exactly what I through. Bad and good carbon.
And not ONE carbon for everything with the same quality.

If it would be like this. then this guy in the movie would be right about saying carbon
is very strong but explode after one impact.
 
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cyclebeatz

Regular
Citius said:
Sounds like you are arguing against yourself here. If carbon fibre was not a viable construction material, then it would not be routinely used for the production of bicycle frames, or F1 chassis, or aircraft airframes, or thousands of other safety critical components.
Click to expand...


No, not at all. I has just read so much bad things about it and I am a little
bit wooried about. Thats it. I don't want buy one carbon bike and then
it has one little impact with whatever and explode like nothing
 
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