tubeless systems use a sealant that will seal up any thorn punctures immediately as they happen.
typically don't need new rims to go tubeless. possibly would need new tires depending on the make/model of your current ones.
watch the videos here...
http://www.notubes.com/support_movie... 7e8803642bf9
http://www.youtube.com/results?searc...rch_type=&a q=f
....to get an idea of what ...



