How To Upgrade Vintage Bike With Sealed Cartridge Bottom Bracket 
https://www.youtube.com/watch?v=1BrVjDFqotE
             https://youtu.be/1BrVjDFqotE?t=120   measurement to order sealed cartridge.
             
  
             How To Build A Cheap Fixie From A Vintage Bike   Sports Tourerour
  https://www.youtube.com/watch?v=sInijI1vr34

1974 Schwinn Sports Tourer Restoration 
http://johns-recycled-bicycle.blogspot.com/2014/07/1973-schwinn-sports-tourer-restoration.html

see in ikiw.homeip.net/Bike.schwinn/ 

The Best Lightweight Bike Touring Setup https://www.youtube.com/watch?v=5nDkL2jHCMg

How To Upgrade Vintage Bike With Sealed Cartridge Bottom Bracket https://www.youtube.com/watch?v=1BrVjDFqotE