I run tubes. May weigh a bit more, but I won't notice any difference. I usually run whatever tube is cheapish- not like my tard is going to see many rocks. It's not street legal either, so no stairs in my immediate future. I've had great luck with kenda HD tubes for street supermoto. They seem to be pretty thick and beefy. I put a UHD tube in the front of a neighbor's dirt bike and it was extremely thick. In my dirt bike I just run tubliss.