Anti-Puncture Tyres At-a-glance

i wouldn't touch a dahon with gloves, why on earth would you run 50? is that a rental thing or sth? anyway, thanks!
Well, it's a guided tour business a friend runs -- I had to change all the tyres...not fun. Great bikes if you need massive adjustability from huge to tiny, though. 6'4" - 4'4", with two quick releases.