Finally got a 20 tooth cog for my 69 Raleigh sports the other day. I chose 20 over 22 because I wanted a slight gearing change rather than a dramatic one.

After making the swap, I realized the axle sat dangerously close to the end of the dropouts, and I needed to lengthen the chain.

Bought a chain tool, watched the YouTube tutorial on how to use it (push the rivets "almost" all the way out and then twist and release), and proceeded to try to add a link. I had chains from two donor Raleighs (a 65 and a 67) on hand.

The holes from the first donor link were too small. The rivets wouldn't go through. The holes from the second donor link were the right size, but the rivet came all the way out and now is impossible to get "started" back in.

1. It looks as though you can't add 1 link, you have to add 2 at a time, is that right?
2. Were vintage Raleigh chains different sizes?
3. The LBS sells new chains for $60-$80. I ain't payin' that.
4. If I were to find a new chain for a reasonable price, what size am I looking for?

Thanks for your patience!