Can only wonder why? There are plenty of used bikes that can be bought in any adult frame size with 650c (571iso) wheels which can often be mated to a 26" (559iso) wheel if smaller is desired. Seen plenty of serrotta and have been tempted by the possibility of a cheap Calfee in 54cm but the smaller wheels don't really benefit anything. I've never seen a full sized adult bike with 24" wheels, just 20". I think bikesdirect.com has/had a couple of them like this. In the years that I sold felt, 99-2010 I don't remember ever hearing of it.
edit: you may be thinking of Terry bikes which often had a 24" wheel in the front but they always had a 700c or 650c in the back which made the bikes awkward.
Originally Posted by
dedhed
Its just a kid's bike. Even comes with smaller reach shifters, narrow bars and shorter cranks.