bluesteak 

It turns out the “schwinn” are actually giant HalfWay bicycles. Anyone have an opinion on them. The frame closure looks a little dodgy to me but I am not a folder guy.

Otherwise they look pretty cool.

Pinigis 

Are you saying that they were not Schwinn bikes but are Giant Halfways???

bluesteak 

yes

wesgreen

Those were pretty good, I think.

tds101 

Giant Halfway folders are considered pretty solid bikes. https://www.bikeforums.net/folding-b...eird-bike.html

bluesteak 

Thanks to all for your help!!

Maybe you may be hearing more from me.

bluesteak 

I saw when adjusting the seat height on the bikes I purchased that there is a collar/shim between the 28.6 diameter seat post and the down tube. This collar only goes in 4 to 5 inches, which seems like a bad idea. Shouldn’t the seat post fit snuggly the whole length of the Dow tube?

Is this just a shortcut for a base model bike? Are larger diameter aluminum seatposts available?

Antifriction

My aluminum Dahon seatpost is 34mm. However I don't think you have a problem; the minimum insertion marking on my post is 4.5" from the bottom, so that's a safe amount of overlap. If you insert more than the minimum, it shortens the lever arm and your safety factor is even higher.

Pinigis 

that shim is exactly as it’s supposed to be. There is no need god it to go in any farther.

bluesteak 

Thanks for your input. I’m old school where if your seat post stuck out 4 inches you needed a bigger frame.

Seems like I will need to adjust my thinking.