New and perplexed

[Sylvia]

Bikegranny,

The seatpost is an old school bmx laid back seatpost. You can find seatposts similar to this on ebay which is where I picked mine up.
I still ride and find it is a great way for me to get exercise since I can't run or walk long distances. I recently did a charity ride in October with some friends and had a blast!!

Sorry to hear about your ribs, but I'm glad you have found a bike that will work for you.