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What am I looking at ?

Old 07-21-04, 01:48 AM
  #1  
poululla
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This picture is of the underside of my father's De Rosa Planet downtube. What is it, and should he be worried? The bike has never been in a crash, if that helps. Comments are as always very welcome
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Old 07-21-04, 01:59 AM
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uhhhh is it steel? that looks like rust under the paint......
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Old 07-21-04, 02:16 AM
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Originally Posted by NZLcyclist
uhhhh is it steel? that looks like rust under the paint......

A De Rosa Planet is an aluminium bike if you cared to check. If this is indeed a form of oxidation, is the integrity of the frame affected at all ?- only serious answers please. Watch the Boks beat the pants of the All Blacks this weekend

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Old 07-21-04, 03:00 AM
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Originally Posted by poululla
A De Rosa Planet is an aluminium bike if you cared to check. If this is indeed a form of oxidation, is the integrity of the frame affected at all ?- only serious answers please. Watch the Boks beat the pants of the All Blacks this weekend
You are looking at aluminum oxide powder under the paint. Lots of al frames get this around the braze-ons and other spots where moisture can get under the paint. There is no structual problem, just a bad skin condition.
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Old 07-21-04, 03:06 AM
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Thanks for your reply Pucci, we thought along the same lines, but now we are sure. You were a great help.
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Old 07-22-04, 05:33 AM
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