Jack,
Thanks for the reply.
The stems don't look like a standard metal stem. Regular stems have a rubber seal at the base of the stem that seals the wheel hole opening. The ones on my wheels have a short metal shaft coming out of the wheel hole and the threaded part of the valve stem starts from there. After looking at it I thought it looks like an innertube setup! I wish I could post a picture, it looks strange to me. The finish of the metal shaft looks to be the same as the wheel.
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