CCM used to "cork" all of their seatposts...an excellent idea as it is the largest portal for moisture to enter the frame. Similarly, I should think a cork in the steerer prevents a lot of moisture from spraying up from the front wheel.
I don't think cork absorbs much moisture...go with it.
Warren Young Toronto
charles nighbor wrote:
> I just obtained an early 80's Davidson Discovery (touring frame) 57cm
> frame and components all in excellent condition. Upon removing handlebar
> with stem I looked into steerer tube and it was closed at the bottom
> with a wine cork. Frame was sold out of the excellent Cupertino Bike
> Shop, CA. No rust was evident inside steerer tube. Some moisture in
> grease however was evident. So my question is this a good idea to do. I
> would be worried about cork absorbing moisture and rusting steerer tube
> to point of failure. Specialty in a area like Seattle.
> Comments please
> Charles Nighbor
> Walnut Creek, CA
>
> --