On Friday, June 23, 2017 at 9:30:15 AM UTC-7, AMuzi wrote:
You may recall old fashioned chainline:
http://www.yellowjersey.org/photosfr...st/chnlinp.jpg


Here are new ones:
https://cyclingindustry.news/shimano...ine-alignment/

including floating sprocket and hinged sprocket.

I also remember when ring and cog were steel and didn't wear out.