In case you're unfamiliar with that numbering system, it means 29mm OD, 17mm ID and 6mm width. Do you have calipers that you can use to measure the hole? Perhaps it is more than 29mm wide, and that was the wrong seal size from the beginning.
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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