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Possible Crack in my Aluminum Frame(6 posts)

Possible Crack in my Aluminum FrameFranchise
Jun 17, 2003 7:38 PM
I have a raised line coming from my seat tube towards the head tube along one side of my top tube. It is about 3 inches long, and I haven't noticed it, if it is a paint imperfection prior to seeing it tonight. The line is not straight, but it has a raised surface compared to the rest of the finish. I was wondering if anyone knew how to tell if there is a crack in the frame. Please let me know because I was going to race this weekend. Thanks.
if you really want to know...philippec
Jun 18, 2003 12:38 AM
sand down a small portion of the raised area to see what's underneath...


I would expect the paint to crack...biknben
Jun 18, 2003 4:55 AM
If the frame was crack I would expect the paint to crack. I'd monitor it closely but not automatically assume it is a frame crack. Mark the frame at the end of the "imperfection" and see if it gets bigger.

It could just be a problem with the paint. Keep a close eye on it.
I would expect the paint to crack...Franchise
Jun 18, 2003 6:32 AM
I thought the same thing. I figured that if the tube has cracked, surely the paint would have a crack as well. It could be a paint imperfection. I'll keep an eye on it, but I think I'll bring this bike as well as a spare for the weekend races.
I would expect the paint to crack...No_sprint
Jun 18, 2003 10:01 AM
I've broken painted alu pieces. While yes, you'd expect the paint to crack, I'd take the safe route. Assume the worst and work back from there. Make sure it's not a crack, especially before racing the thing.
I would expect the paint to crack...MikeDee
Jun 19, 2003 3:29 PM
I had my frame crack almost all the way around the seat tube. I also thought it might be a paint flaw until I flexed the frame and was able to stick a utility knife blade in and it stuck when I unflexed the frame. The crack started at a hole drilled in the frame to mount the derailler braze-on.