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Old 02-12-09, 10:23 PM   #1
xenologer
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Rust on Inside of Handlebar?

Today I was replacing the end caps on my handlebar, since the old ones were pretty chewed up...
And noticed that the inside of the bars were coated with a fine layer of rust.
This makes me worry of course.
The bars appear to be steel (magnet test) and their outside is still bright and shiny, so it was a shock to see the insides seemingly corroding away...

Im just wondering why it should be so bad on the inside, trapped moisture issue? and what I could be doing about it.

Thanks
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Old 02-13-09, 06:01 AM   #2
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Steel really likes to corrode, so unless something has been done to stop that it will eventually find enough moisture somewhere to corrode a little. However, steel bars are usually quite chunky and can for most applications well take some surface rust. Usually, once the available moisture is used up corrosion will stop.
Try the following: Remove end cap, lean bike over, tap/shake a little, see how much that falls out. If what falls out is a fine powdery stuff and not much of it(teaspoon or less) ride on and don't worry about it. If what falls out consists of large flaky bits, and quite a lot of it(tablespoon) - consider replacing bar.

If you really want to you can pull both end caps off, thread a steel wire through the bar, pull a rag through the bar a couple of times and then apply the rust proofing agent of your choice. Either bike specific frame saver or something from your local car parts store.
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Old 02-13-09, 05:03 PM   #3
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Don't worry. Be happy.
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Old 02-13-09, 05:55 PM   #4
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Worst comes to worst, you are talking about cheap steel handlebars. They won't fall apart, but if they do, it will give you a chance to upgrade to a nice alloy set.
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Old 02-13-09, 07:55 PM   #5
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Thanks
I know it's not a serious structural issue, but I like to hide contraband in the bars and don't want rust powder contaminating...

Plus someday if it does get really bad, taking everything off the bars would be a pain.
I still have to wonder why its just the inside that has a problem, is the outer surface typically coated in some way to protect it?
Or could it be that somehow a tiny bit of moisture got trapped inside and since it was unable to evaporate things went bad?-if thats the case I may not need any special framesaver sprays at all, just be more careful about sealing the end caps...
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Old 02-14-09, 12:08 AM   #6
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Use a good, thick ziplock baggy for your contraband, I guess.

The outside of the bar is probably chromed.

It's probably just about impossible the keep any moisture out of there. Maybe if you took it out in the desert and welded the ends shut? There was at least some moisture in the air, in the factory or the shop, when the end plugs were put on, and the end plugs probably don't make a perfect seal, either.

You could ride without end plugs, and after each ride run a trumpet cleaning rod and cloth through it, and then tip the bike on its side in a hot place. But then your contraband would fall out, I guess.



Quote:
Originally Posted by xenologer View Post
I know it's not a serious structural issue, but I like to hide contraband in the bars and don't want rust powder contaminating...

Plus someday if it does get really bad, taking everything off the bars would be a pain.
I still have to wonder why its just the inside that has a problem, is the outer surface typically coated in some way to protect it?
Or could it be that somehow a tiny bit of moisture got trapped inside and since it was unable to evaporate things went bad?-if thats the case I may not need any special framesaver sprays at all, just be more careful about sealing the end caps...
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Old 02-14-09, 07:51 AM   #7
JanMM
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Quote:
Originally Posted by xenologer View Post
Thanks
I like to hide contraband in the bars and don't want rust powder contaminating...
Do you use your bike as a mule?
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