Sunlite 21.1 Stem Dia. x 32.5 Cup Dia x 26.4 Crown Dia.
Chrome plated - brand new
Fits those old BMX Threaded forks - all brand bikes
Good for the old Schwinn Varsity 10 speeds too.
Bikes from the 60”s 70’s and 80’s
Great for those reconstruction projects if you need a new headset
Great question and explanation follows :
Hi everyone! I'm building up an old '72 Schwinn Varsity with my sister for when she goes to college as a graduation gift. I've got most of the parts down, but the one thing that is still confusing me is the headset size. Unfortunately, I do not have the original cups and bits, which I would have otherwise reused.
Sheldon's explanation makes it seem as though I have to buy two or three different headsets, then mix up the parts so that everything fits
Do I need to do this, or can I just buy a BMX 1" threaded headset? Or a standard 1" threaded headset?
The old Schwinns used a headset size that was eventually adopted by the original BMX crowd. They are 1" headsets but have different dimensions. If you can find what is commonly referred to as "OLD SCHOOL BMX" sized headset, it will work. But they can be expensive. The Sunlight BMX headset will do the job.
The BMX headsets have the same dimensions as the Schwinn ones. The original BMX Old School size was the same as the Schwinn sizing on all their '60s through early '80s bikes, with the exception of the Paramount’s.
