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

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26
votes
6answers
18k 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 ...
17
votes
1answer
9k 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 ...
15
votes
4answers
6k 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?
10
votes
6answers
13k 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 ...
9
votes
4answers
3k 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 ...
8
votes
2answers
1k 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
3answers
4k 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 ...
8
votes
3answers
601 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 ...
7
votes
2answers
250 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 ...
7
votes
1answer
466 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 ...
6
votes
2answers
1k views

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

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 ...
6
votes
2answers
1k 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. ...
6
votes
1answer
112 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 ...
6
votes
1answer
724 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.
5
votes
3answers
3k 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 ...
5
votes
3answers
771 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 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 ...
5
votes
3answers
3k 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 ...
5
votes
1answer
257 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
530 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 ...
5
votes
2answers
1k 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 ...
5
votes
2answers
203 views

Carbon cranks care?

I have carbon cranks (SRAM S-2200) on a new bike. The side is quite protected but the bottom part, where the pedals are fitted, is not. Hitting rocks on the bumpy road is sometimes inevitable. How ...
5
votes
2answers
253 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. ...
5
votes
2answers
928 views

How should I prepare a carbon frame when I want to swap in a new bottom bracket?

My four-year-old, carbon-framed road bike has developed a case of creaky cranks. I only hear creaking when pedalling hard, when I pedal more softly it just sounds like it has always done. Given the ...
5
votes
1answer
150 views

Carbon fiber chip

See the white mid picture in the shape of a canine tooth. The sticker / veneer came off / separated. Is it something I should worry about? Is there something I can do? Niner Air Nine Carbon. I ...
4
votes
1answer
624 views

Is it safe to leave my carbon bike in my stationary trainer for extended periods of time?

This time of year, I leave my race (carbon) bike on the trainer and when nice enough, just ride my rain/wet/commuter/cx bike. I do replace the 'race' skewer with a steel skewer for trainer use. Will ...
4
votes
1answer
50 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 but that's ...
4
votes
3answers
890 views

Carbon Seatpost / Frame in Repair Stand

I've got a Park PCS-10 repair stand, and just acquired my first carbon bike. Is there anything I should know about clamping either the frame or seatpost in the stand? Being a few years old, the frame ...
3
votes
4answers
788 views

Trek Domane and undamped motion with Isospeed?

Being a car guy and autocrosser, I'm familiar with suspension systems and the necessity to find a balanced spring/shock combination to create the best possible compliance, ride quality and performance ...
3
votes
5answers
18k 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 ...
3
votes
2answers
782 views

Repair superficial damage to a carbon frame

I have a carbon frame with an integrated seatpost. The saddle sits on a clamp that is meant to secure the saddle on the seatpost and NOT hold the weight of the rider too. I went on a ride and my knees ...
3
votes
3answers
183 views

Carbon bike specific maintainance

I am about to get my first carbon bike next spring, it's a MTB with a carbon frame with some aluminium components. What are the things I should do and should not do, to avoid damaging it by improper ...
3
votes
2answers
2k views

Tight Seatpost Installation

I'm having a bit of a problem installing my seatpost. I have a 31.6mm carbon-wrapped aluminum seatpost which fit perfectly fine in my previous aluminum frame. Unfortunately, that frame cracked, ...
3
votes
2answers
1k 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 ...
2
votes
4answers
5k 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 ...
2
votes
2answers
203 views

Carbon frame strengh

Almost every question Bicycles.SE about damaged carbon frames seems to get the same answer: "the frame isn't safe anymore." How strong of a hit is needed to break a carbon frame? There are little ...
2
votes
5answers
446 views

Advice needed re Carbon Fiber vs Shocks

I am an occasional rider who bought my last bike 15 years ago (an all-aluminium Saracen with shocks). I've put about 400-500 miles this year and am thinking of taking up one of the Cycle to Work ...
2
votes
1answer
167 views

Carbon frame damage

Please help. What should I do? I just bought a full carbon road bike that is less than 30 days old and noticed a hairline glitch where the seat post and seat stay meet that I can feel with my ...
2
votes
1answer
965 views

How to pull a carbon seatpost out of a carbon frame?

How do I pull out a carbon seatpost on a carbon frame? It seems so hard for me... Do I need a special tool, or just ask help from a local bike shop? done with the seatpost. I made the frame and ...
2
votes
1answer
783 views

How worrying is damage to a carbon fiber frame near the bottom bracket?

Last week on a ride my chain popped off the inner chainring and managed to get stuck between the chainring and frame. I (probably foolishly) tried to work it free by yanking on the chain and that ...
2
votes
1answer
313 views

Protecting carbon bike frame after a small chip?

My bike frame is carbon and it recently got a small chip. It's about the size of a pinky fingernail in size. Should I do anything to treat the chip to help prevent it from getting worse? Here's a ...
1
vote
2answers
390 views

Does “Carbon & Aluminium” really mean cheap plastic coated aluminium?

I'm looking to replace the suspension fork on my MTB (which has blown a seal) with a rigid fork now that I'm exclusively commuting in the city. During my research I came across the MOSSO 26" MTB ...
1
vote
1answer
207 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 ...
1
vote
1answer
195 views

May I ignore the frame damage (or should I get a budget carbon frame)

I was happily using my Canonndale F5 Hardtail to commute to work and other places (like shopping, going to a swimming pool and the like) until recently I had a very unfortunate accident with a car. To ...
1
vote
2answers
340 views

What torque for caliper brakes onto carbon-alloy forks?

I've recently got a new bike with a Kinesis DC07 carbon/alloy fork. This comes with deep-drop calliper brakes (Shimano R451 Dual Pivot). The first time out I bumped one of the brakes and it twisted ...
1
vote
2answers
337 views

Carbon seatpost dip in?

Can I insert a carbon seatpost up to 20cm deep into seat tube? The seattube is carbon as well. Total length of the seatpost is 35cm. The shape of the seatpost is aero seatpost (tear drop shape). It's ...
1
vote
2answers
1k views

Installing a compression plug

I am currently building a bike up. I have a carbon fork, with a carbon steer tube, and I have to install it using a compression plug. I picked up one of these this morning: ...
1
vote
1answer
133 views

Carbon frame cracks

I have a 2010 Gary Fisher Cronus, when I brought the bike in for a tune up this spring the bike shop told me they wouldn't do it because of cracks around the seat post. They pointed out that I had my ...
1
vote
2answers
32 views

painting an aluminum/carbon frame

I have a frame I would like to get repainted. It is a composite of aluminum and carbon fiber (Al main triangle, carbon fiber seat/chain stays). The carbon fiber is unpainted (maybe a clear coat) and ...
0
votes
1answer
214 views

Cheap Carbon Fiber Wheels

Right, I guess inserting where they're made in the title would be a little politically incorrect but essentially the link below would give you the exact product that inspired the question :- Cheap ...