Old 07-12-20, 09:48 AM
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scarlson 
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Location: Medford MA
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Bikes: Ron Cooper touring, 1959 Jack Taylor 650b ladyback touring tandem, Vitus 979, Joe Bell painted Claud Butler Dalesman, Colin Laing curved tube tandem, heavily-Dilberted 1982 Trek 6xx, René Herse tandem

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Originally Posted by retiredguru
First thought was to do that. I might at the end of the riding season. The 26" ARAYA rims on my Specialize Hard Rock are notorious for cutting into the rubber of Shrader valves. Deburring has marginally helped as the holes are actually larger than the what the valves are on the tubes I have been getting.
I often like using Schrader rims with a grommet to presta to avoid this problem. The grommet takes all the abuse the rim can dish out and the tube stays perfect. Cheap or old tubes will still pull out at the valve, however. The polluted Boston air seems to do a number on them, tubes lasted forever back in Vermont.
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