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Questions tagged [carbon]

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

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30
votes
6answers
56k views

Why is carbon fiber inherently weak? Or is it?

This question got me to thinking: If it were possible for me to use a carbon frame, I would, but the expense and my riding style keep me using steel and aluminum. (I like hauling stuff on racks and I'...
28
votes
2answers
14k views

Road bike carbon fiber frame life span

I have read in several places that the carbon fiber has a shorter life span than the aluminium, and i was wondering just what would it be. I am not referring to accident related failures of the frame....
26
votes
11answers
47k 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
votes
1answer
5k 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?
16
votes
5answers
18k 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?
15
votes
5answers
11k views

How does stiffness in carbon frames increase speed?

I have a Specialized Roubaix with a 7r carbon frame; the Tarmac has 11r. Will I notice a speed change if I ride "exactly" under the same conditions? Does the additional 4r = more speed? I am thinking ...
14
votes
1answer
48k views

Difference between UD, 3K and 12K carbon finish?

What does UD, 3K, 12K carbon mean and how do they differ?
13
votes
4answers
5k views

Why would a bike feature a “carbon wrapped aluminum frame”?

I saw a link to what appeared to be a Carbon bike on amazon. The price was extremely lower than any carbon bike I had ever seen. After reading a bit, it seems that the bike frame is really made of "...
12
votes
4answers
11k views

Metal seat post with carbon fiber frame?

Is using a metal seat post on a carbon fiber frame advisable or not? I want to use a seat post mounted rack on my road bike (no regular rack mount points are on this bike), but I have been told that ...
11
votes
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 ...
11
votes
2answers
3k views

Crack in fork or just paint

Yesterday I saw something like a crack in the carbon fork of my roadbike. Now I don't have any clue if this is a really a crack or just the paint. Maybe someone can help me or tell me how to find out. ...
11
votes
3answers
14k 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 ...
11
votes
3answers
3k views

Should I avoid sitting on top tube on my carbon bike?

In another bicycle discussion forum I encountered a thread about possibility to damage carbon frame by sitting on top tube while stopped. I see some sense in it, as generally tube walls are a lot ...
10
votes
4answers
6k views

Why do some road bikes cost more than motorbikes? Are they grossly overpriced? [closed]

I have seen quite some carbon fiber bikes that cost upwards of $4000. Why do these bikes cost so much when one can get a very good motorbike for $3000? A motorbike comes equipped with several ...
10
votes
3answers
10k views

Why do bikes have carbon forks?

I have noticed many bikes for sale that are made of mostly one material, such as aluminum, except for the fork which is carbon. I know carbon is very expensive so the manufacturer must be trying to ...
9
votes
5answers
85k views

How to tell if a carbon frame is damaged or if the paint just has stress cracks

I am looking at a carbon framed road bikethat has me concerned.On the topside of the bottom bracket,drive side there is a very small hairline crack in the paint.The seller states that it has been ...
9
votes
1answer
6k views

Felt carbon steerer compression plug removal

How do I remove a compression plug (aka. expander bung) like this one? Most guides I could find assume that there's a 6mm hex Allen opening that allows tightening/loosening the plug (example pictured ...
9
votes
2answers
2k views

Benefits of newer racer bikes over older ones?

10 Years ago, when I was 14, I got my first road bike. It costed around 1000 € (~1350$), and I have been using it every year. I have cycled at least 1.000 km every season. Now, I have started to ask ...
8
votes
7answers
6k 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?
8
votes
5answers
3k views

Does anyone sell a direct-drive recumbent with no handlebars?

This document well describes the benefits of a direct-drive recumbent. Is there any carbon-frame recumbent, commercially available, that implements all its recommendations. And what are the pros and ...
8
votes
3answers
5k views

Can a carbon fiber mountain bike handle cool/cold weather?

It is late summer in the US and I am starting to look forward to autumn and winter mountain biking. I have a carbon fiber frame though. Didn't get to ride it last winter due to a broken collar bone (...
8
votes
1answer
4k views

carbon vs aluminium frame vibration absorption? bumpiness?

is there any data/measurements of any aluminium road bikes vs carbon road bikes wrt to vibration. it is widely stated that carbon is a smoother ride, but the best i can find out on the subject is ...
8
votes
1answer
6k views

Do Carbon Wheels Stay True Longer Than Aluminum Wheels?

Does a race quality carbon wheel set stay true longer than an aluminum one (with equal abuse/mileage) ? It seems like the properties of carbon would resist flat spots and warping better than ...
8
votes
2answers
2k views

Putting a front Derailleur on a carbon frame

Do you put anything under the clamp on the carbon to protect it? In the past I've tightened brakes on MTB handle bars to much and wrecked them so I'm wondering.
8
votes
2answers
3k views

Installing a lock mount on a carbon fiber frame

Let's ignore the question, for a moment, of should I install a lock mount on my new TCR Advanced. But assume that I want to. Given that the frame is carbon fiber, should I be worried about the ...
8
votes
1answer
459 views

brakes for carbon rims

I'm considering switching from alloy to carbon wheels - just a question regarding that & brakes. Would I need different pad materials from the standard sort of pad material (or even a whole ...
8
votes
1answer
527 views

Do bikes with carbon frame get detected by induction loops?

Induction loops in my experience usually manage to detect bicycles with steel and aluminium frames. Do carbon frames also get detected? I'm wondering if a possible inability to trigger induction loops ...
8
votes
1answer
102 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'...
8
votes
1answer
746 views

Older Carbon Bike Safety

I have an older Trek 2100 that has carbon fiber tubes with aluminum stays (The frame is used early 90's 2100/2150/2200/2300 road bikes) After a recent accident with a car (going down hill, guy pulls ...
7
votes
2answers
5k views

Safest way to carry luggage on my carbon frame?

I'm planning a 5 day trip on my Trek Madone 4.5. We are planning on staying motels so don't need to carry camping equipment. I need to find some type of rack that is compatible with my carbon frame - ...
7
votes
3answers
2k views

Damping effects of carbon forks

Around where I live the common wisdom is that on a road, gravel or similar bike, a carbon fork will cushion some of the vibration more than a metal fork. On some web discussion forums I see that ...
7
votes
1answer
342 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 ...
6
votes
1answer
1k views

Carbon Wheel Heat Bending

After riding about 800m downhill, I got this: BTW, this is TriAce Wheelset for Dahon Mu Ex 2014. Do you think this is safe to ride? Can I repair this?
6
votes
3answers
7k views

What are the benefits of a carbon seatpost?

As the title states, what are the benefits of a carbon seatpost like this one from MEC? My research indicates there may be the following pros and cons: Pros Lighter Supposedly smoother ride Cons ...
6
votes
1answer
7k views

Can I use brake pads for carbon wheels with aluminum wheels?

I bought a bicycle with carbon wheels, and for training I purchased an aluminum wheelset. I have SwissStop brake pads. Can I use them with aluminum wheels? I don't care much if these pads wear out ...
6
votes
2answers
5k views

Carbon 700c Wheels: What does 33/50/60/88 mm refer to?

I've been browsing 700c carbon rims on ebay, and noticed most are listed with the 33/50/60/88/etc mm in the title. What does this represent? It doesn't appear to be spoke/nipple holes. Additionally,...
6
votes
2answers
705 views

What are these mounts for on inside edge of carbon fiber fork?

I just got a new Tommaso Sterrata. I commute during the winter so I'm looking to put fenders on. I know I can get fenders that clip onto the fork instead of being mounted, but while inspecting the ...
6
votes
2answers
2k views

Carbon Fibre Mountain Bikes

Has anyone had experience with carbon fiber mountain bikes? I'm still skeptical as to how robust they are. Is it true that a scratch will make the frame useless? And Trek has this process called OCLV ....
6
votes
2answers
784 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 ...
6
votes
2answers
2k views

Is there a way to check for non-visible damage on a carbon frame?

I had an accident on my carbon road bike. As I look at it, I do not see visible damage to the frame or forks. Is there a way that the frame can be tested for damage and if so, how do I get this ...
6
votes
3answers
7k views

Do I need to be concerned about a carbon frame if I attach a bike trailer?

We have a bike trailer with the hitch attached to the rear axle. The frame of my wife's bike frame is part carbon (right around the rear axle), which I understand is more brittle than other materials. ...
6
votes
1answer
3k views

Is there a ulock mount that uses the bottle cage openings?

I found one that a guy made I think with 3d printers or something but seems like an excellent solution. I have a carbon frame bike and I don't want to use traditional ulock mount at the top because ...
5
votes
2answers
874 views

Carbon frame that is designed for strength and durability rather than lightness?

Are there such brands who have overbuilt carbon frame that is intended to last longer? Most if not all frames nowadays seem to always talk about being lighter stiffer, but I never seen one made to be ...
5
votes
2answers
3k views

U-lock mount bracket on carbon frame?

I took my bike to the bike shop to get remove the quick release wheel things, so that I can use only one U-lock, anyways they changed it for me but the bike mechanic really got mad at me and said 'you ...
5
votes
4answers
8k views

How to cut carbon handlebars

Last year, I installed carbon bars on one of my mountain bikes and I'm finding them too wide. I've been told that taping over the points you're going to cut at will prevent fraying/roughness, but what ...
5
votes
2answers
2k views

How do you spot fake Campagnolo Bora's?

I have my eye on a set of second hand Campagnolo Bora Ultra two rims that are being sold by a friend for someone else. In South Africa the rims cost about +- R25 k (Rand is South Africa's currency) ...
5
votes
2answers
155 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 ...
5
votes
1answer
195 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 ...
5
votes
1answer
1k views

Repairing Carbon / Aluminum frame

My road bike is aluminum with a carbon rear triangle. The carbon rear slides into the aluminum, and I believe was bonded with some sort of epoxy. The pieces have begun to separate after 2.5 years ...
5
votes
2answers
1k views

What's the best way to fix carbon to titanium?

I'm building (experimenting if you wish) something out of the old bike parts and I need to fix two parts together one titanium and carbon. Basically the parts are two tubes one made of carbon of a ...