My seatpost's diameter is 26.4 or 26.8 (I can use both diameter posts in my bike).

I can't seem to find a lot of seatposts that fit my bike.

In the Digave videos, I notice a lot of riders are riding shorter frames with more seatpost showing.

Thus, I assume track bikes utilize a longer seatpost.

Where do you all shop for seatposts? My LBS has a limited selection, qbike doesen't have many and I couldn't find more than one that fit my bike at Nashbar.

Do most people with vintage bikes end up just using a shim?