Hey all,

I have for the last few months been riding a 70-80's built(according to a bike friend who looked at it) thin chromoly steel frame roadbike that I basically got from a friend. Bicycle works well enough-however it was left out in the rain for long enough to rust the chain which we cleaned-but also to rust the seatpost solidly into the frame. I've tried spraying rust remover along the edges and hoping it would seep in and then attempting to twist the seatpost out but to no avail. It is a minor problem but I'd love to have the seat just a few inches higher-currently it is a little low for me. I've been riding it daily and have done several 15-20 mile runs but it would not be comfortable for longer rides.

I'm also curious if over time the rust will eventually corrode the frame from inside out? I'd assume that would be probably further down the road than the rest of the bike will last.

Advice greatly appreciated for a poor college student!