lawdawg,

I have a Volcano, not a Tsunami. But the basics of tires and wheels are the same. You need the right hex size nd the right distance from where the hex mounts n the rim to the inside edge of the wheel for clearance. nd the diameter of your wheels and tires is not critical as long as the outside diameter of your wheels (like 2.8 inch or 2.2 inch) matches the inside (bead) diameter of the tires. Aftr that, the outside diameter of the tires can be what you want, although it can affect acceleration and top end speed. Check the following post for more detail, but remember it is specific to a Volcano.

[link=http://www.rcuniverse.com/forum/fb.asp?m=7393052]http://www.rcuniverse.com/forum/fb.asp?m=7393052[/link]