Carbon Fiber
Carbon Fiber
Carbon fiber frame is about to fail? How does it fail, what kind of crash worst possible?
I ride a carbon fiber frame road bike and was unlucky to hit a log at a very high speed (around 70km/h). I cleared the front wheel but the rear wheel really took a hit. I know that carbon fiber bikes are strong, but I would like to know what kind of warning signals should i be looking for? My rear wheel had to be replaces (hard hit) but the bike seems OK. Should I be concerned about micro cracks spreading?
Any help is appreciated. Thanks!
Thanks for the answer. I should have been a little more clear. I took the bike to the shop right away and they said it was OK... its been a few months, since the incident and I've been riding it just fine. No cracks are visible... so you think I am "in the clear"??
Thanks again.
Carefully inspect the entire frame for cracks. Sometimes they show themselves as fine scratches, so be careful. A magnifying glass may be helpful.
If you see ANY cracks (or possible cracks) I would take it to a shop for evaluation BEFORE riding it again.
EDIT:
There is always the possibility of something delaminating after a big hit, and it isn't always able to be detected. The most common areas after trauma are at the seat tube/top tube/seat stay junction and at the rear dropouts. You might do well to remove the seat post from the frame and "feel around" for hairline cracks.
Carbon fiber frames are good for about 15,000 to 20,000 miles if ridden carefully but I always recommend replacement or professional evaluation (includes completely tearing the bike apart and applying loads to certain parts of the frame) every 5,000 miles or 2 years.
Somehow I don't think your shop did anything except a casual inspection, so I would still inspect it myself... every inch... very carefully.
Oh.. the worst possible failure is known as SCF, or "Sudden Catastrophic Failure". SCF occurs without warning and is usually, well, catastrophic. This is most prevalent on carbon fiber and high end thin walled aluminum frames.
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