schwinns from the early 80s back seem to have a fair number of odd sized and/or oddly made parts - at least by contemporary standards. (example: South Fulcrum and i have an 80s varsity on our stand right now that has what appears to be a "free wheel" crank and a fixed, multi speed rear hub allowing you to change gears while "coasting".) this, makes them hard to work on sometimes but if it is a chicago schwinn and all the parts seem to be present and in good shape, it should be kinda close to bomb proof. things to look out for:

- does the tubing appear more narrow than average? if so, this will cause trouble with replacing seat posts and HB stems.

- does it have single piece cranks? Even if they are in good shape, these can limit your choices for chain rings should you want to change them. There are adapters but this will add about $20 to your conversion which will be in addition to the new cranks and BB you'll have to buy.

how do i know this? i have a 73 continental with both narrow tubing and a single piece crank. i keep it - and keep working on it - simply because it is beautiful and fits me perfectly.