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Has anyone had a degreaser eat/erode an inner tube?
This is a new one on me, and our bike mechanic.
I'll spare you much of the story. I took a bike to the shop and while it was there, our mechanic degreased the rim. About a week later the inner tube developed a puncture. When I looked at the tube there was a hole in an eroded patch on the rim side. The eroded patch was 6 to 8 inches long. I patched the hole and the patch failed overnight. I patched it again with a significantly larger piece of rubber. I discovered that some of the glue on this patch had failed after I took the tube out to deal with another flat. A second hole had developed in the eroded spot. The best we can come up with is that the problem might be chemical and might be caused by a degreaser... possibly a new, eco-friendly one they started using. Which leads right back to my question... Thanks for your time. |
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#2
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Has anyone had a degreaser eat/erode an inner tube?
In article ,
phorbin wrote: snip The best we can come up with is that the problem might be chemical and might be caused by a degreaser... possibly a new, eco-friendly one they started using. Greases are petroleum products which degreasers dissolve. Rubber is a petroleum product and it makes sense that a degreaser could do this. You didn't mention anything about a rim strip, though; the mechanic didn't happen to leave that off, did he (or leave a cloth rim strip on while degreasing to soak the stuff up)? |
#3
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Has anyone had a degreaser eat/erode an inner tube?
Tim McNamara wrote:
In article , phorbin wrote: snip The best we can come up with is that the problem might be chemical and might be caused by a degreaser... possibly a new, eco-friendly one they started using. Greases are petroleum products which degreasers dissolve. Rubber is a petroleum product eh? what /kind/ of rubber are you talking about timmy? this one? http://en.wikipedia.org/wiki/Rubber and it makes sense that a degreaser could do this. You didn't mention anything about a rim strip, though; the mechanic didn't happen to leave that off, did he (or leave a cloth rim strip on while degreasing to soak the stuff up)? |
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Has anyone had a degreaser eat/erode an inner tube?
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#6
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Has anyone had a degreaser eat/erode an inner tube?
In article ,
phorbin wrote: In article , says... In article , phorbin wrote: snip The best we can come up with is that the problem might be chemical and might be caused by a degreaser... possibly a new, eco-friendly one they started using. Greases are petroleum products which degreasers dissolve. Rubber is a petroleum product and it makes sense that a degreaser could do this. You didn't mention anything about a rim strip, though; the mechanic didn't happen to leave that off, did he (or leave a cloth rim strip on while degreasing to soak the stuff up)? He took off the old, rubber rim strip and replaced it with a plastic one of some sort after degreasing. Could the sharp edge of the plastic rim strip be cutting the tube. Petroleum does not attack butyl rubber. Notice how your bicycle tires are immune to chemical attack? -- Michael Press |
#7
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Has anyone had a degreaser eat/erode an inner tube?
In article ,
says... He took off the old, rubber rim strip and replaced it with a plastic one of some sort after degreasing. Could the sharp edge of the plastic rim strip be cutting the tube. Petroleum does not attack butyl rubber. Notice how your bicycle tires are immune to chemical attack? Subject: Has anyone had a degreaser eat/erode an inner tube? From: phorbin In article , says... He took off the old, rubber rim strip and replaced it with a plastic one of some sort after degreasing. Could the sharp edge of the plastic rim strip be cutting the tube. Petroleum does not attack butyl rubber. Notice how your bicycle tires are immune to chemical attack? The surface of the rubber was eaten away and it looked rotted and soft. The rotted patch was an irregular shape which probably conforms to the rim. The holes formed in the rotted patch. A chemical attack is the only reasonable explanation. The theory is being tested. It may be that the issue has more than one contributing condition. A degreaser that can attack butyl and a duration of time with the residue of the degreaser trapped against the tube. It may also be a degreaser that degrades to constituents that can attack butyl. Since I've never used solvents on or around bike inner tubes I've never had reason to notice that bicycle tires are immune to chemical attack -- The faq I found suggests that they aren't. They are certainly stable within their expected operating conditions. I'd guess however that running into a patch of butyl dissolving degreaser isn't within those conditions. :-) |
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