Originally Posted by
davester
I'd cancel that 20" tire order if I were you. Taking your 22 3/4" minus 2x5/8" gives you an estimated BSD of 22.5" = 546mm, which Sheldon's table shows is nowhere near the BSD of a 20" tire. If your measurements are correct, Sheldon's table indicates that you almost certainly need either a 24" or 26" tire. 26" is more likely for an adult bicycle. I'd suggest that you remove the tires, lay them on the ground and measure the actual BSD in several places then compare to Sheldon's table that I linked to in my first post. That's really the only accurate way to do this
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I just got the tire and figured this out WITHOUT. Knowing what a BSD is …. But knowing about outside diameter explains a lot . ( I have restored 4 Model T’s and A’s and always ordered RIM sized tires )
Now I need both a 86” brake cable and shifter cable … are these measured differently?
is there a place /person that does this ?
Is there a place I can buy ALL. the ingredients to make my own ? Already bought a 25’ roll of chain