You should be able to change the tire just as you would on the atv. The only difference is the rim does not have a bead so the tire is a little harder to get off the rim.
There should be an o ring between the two rim halfs. I would suggest using a tube or definitely use rtv on the o ring when you install the new tires.
* 1978 ATC 90/180 Pauter PJ1 / Springer "Team BAPP" Bike *
* 1980 ATC 110/180 "Danny's Machine Works" 3D Sprint Dune Bike *
* Nicholson 500 Race Bike *
* HPATC Yamaha RD350 "Big Moe" Trike *