I have a question that I need answered on sizing on a 24 inch rim. I have a buddy that is wanting to put Berm Master tires on a 24 inch rim for his cruiser bike that he is building. His question is what is the smallest width rim that he can use to make this tire fit and work correctly. Does he need to go to the 50 mm rim or can he use a smaller mountain bike rim. Any help is appreciated. Thanks again. Leo