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Early Carbon Fiber question

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Early Carbon Fiber question

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Old 01-20-11, 03:46 PM
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orangegore 
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Early Carbon Fiber question

I have this 1993 or 94 Trek 2300 and on the bottom of the top tube where it meets the seatpost lug there's what looks like seperation in the finish from the carbon fiber or something. Is this a problem? Are bubbles in the clear coat problematic? Safe to ride? Safe to sell? Longevity? I don't see any problems with the fiber itself. Thanks!
http://farm6.static.flickr.com/5166/...0a852fe3_z.jpg
http://farm6.static.flickr.com/5245/...c591bb76_z.jpg
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Old 01-20-11, 04:22 PM
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SkinnyTireSteve
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I am by no means an expert, but I do own a similar bike. My 2500 has some of the same spots. From past experience with carbon motorcycle parts, I believe that is just the clear coat starting to loosen a bit. If the tubes are still tight to the lugs, then I don't see a problem with riding it. It may need a new clear paint job some day, but I wouldn't worry about it too much.

Maybe someone will chime in with a definite answer for both of us.
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Old 01-20-11, 04:40 PM
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Al1943
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I agree with the above. Test the bonding by trying to twist the top tube at the lugs, but don't try too hard.
My 5500 has some bubbling in the clear coat adjacent to the bottom bracket and the axle dropouts. I don't believe the joints have been compromised.
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Old 01-20-11, 07:35 PM
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TromboneAl
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I have the same bike (am now passing it on to my daughter). It's a great bike, but I remember reading that some of them had problems with separation. You may be able to turn something up with googling (like this).

I think mine was a '92 and it shows no evidence of separation (I think it spent a lot of time in a garage before I bought it for $350).



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Old 01-21-11, 01:39 AM
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Kimmo
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I had a Giant CFR1 that ended up developing a crack through the paint all around the seat tube where it went into the seat cluster lug... from memory, the seat tube even appeared to have moved down about 1/3mm.

It never made any noise, and it seemed to ride just the same... mind you, I kind of eased off on bombing it off gutters after I noticed the crack...

Held up fine till it was pinched a couple of years later. Hope it instantly exploded under the **** who nicked it.
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