Thanks, I'll bet you're right. How do I get the cap off of the wheel to get at the o-ring. Is there a special tool and where do I get one? Thanks again.
You need a pin spanner, Park Tool SPA-1. Most good bike shops will have some. You can probably do it with needle nose pliers. The cap has a reverse thread... Take a look at that.
Should have stayed in one thread only...
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