Schwinn S-2 questions

[joel.romeo.79]

An s-2 26" is a (57-559) not a (54-571) . (54-571) is 26x2x13/4, (57-559) is 26x2.125. I do not have anything but original tires on my old Schwinn 20" so I cannot check the iso.

Sent from my SM-N910P using Tapatalk

 

[Bicycle808]

An s-2 twenty takes 406 tires, typically 57x406, but the bead itself is at 406mm diameter.

 

[Bicycle808]

ps- Schwinn twenties could also be s7 (419iso) or s5/s6 (451iso); 451 tires are easy to find, but 419s can be tricky.