Do any size atv tire fit an atv that is not its own size?

It depends....Width could be an issue if you have a smaller bike and also height but usually any size tire will work as longs as the lug holes line up....what kind of bike do you have and what are you trying to put on it?....email me that and i can tell you if it will work without a lift or spacers..jessie_lafferty@yahoo.com