Smaller tires and or wheels would NOT change the relative position between saddle/pedals/bars...though might make it more comfortable starting and stopping! :-O I have a LARGE old AustroDaimler, that is WAY too big for me, but I find it comfortable to ride. Looking great for a 30+ year old bike. Varsities were a bit of a TANK, nearly indestructible...don't think I would want to do a century on one, or a long climb, but for just banging around, they are a laid back ride.