Originally Posted by
cplager
It would not be easy to put on a rear 24" wheel on almost any 20" folder. Changing on the front only isn't the best idea either.
Regardless, why would you want to?
1. see very few 24 inchers
2. could fit more easily on airplane than 26
3. i've ridden a 20 inch before and I did not like it much at all. Hopefully, 24 would be better and close enough to a 26
Just speculating. I figure that some frames could likely handle it (just 2 inches) while others cannot. Big thing would be brake braze-ons, to which it looks like disc brakes are the only way to go. Or just putting brakes on the front and relying on a coaster brake.