Plaid and purple tires seem to be the best general combo, they have worked great for me on a variety of tracks.
To keep the balence of front rear traction the plaid purple combo has, use cyan and magenta. It will be better for lower traction or tight tracks.
Note--I run only TRC tires.
For the tc3, up to 30mm rims can be used, but if you use the outer shock mounting hole on the arm, then you will hit the shock eyelet if the front wheels are turned all the way.
Team Associated - Reedy Power - Sweep - Protoform - TQ Wire - Lacher paint