You put them on just like a regular tire and tube. Get one side of the sidewall around the rim, then insert the tube, be sure tube is around the rim and pry the sidewall on. Of course it's not that easy takes a bit of work. I think I spent at least 1/2 hour to do both.Hey fairracing31, If they had 26'', how do you put them on? And what are they made of?