This gets asked a lot, so I weighed what I own. Add what you can verify to the list.

Panther Boa C, Velocity wheel, stock foam = 6.6 oz belted with liteweight strapping tape
Proline Crimefighter MT, Velocity wheel, Racers Edge foam = 7.5 oz. belted with liteweight strapping tape
Stock Revo; Talon on Gemini = 9.2 oz.
Panther Python T150, Traxxas Hurricane wheel, stock foam = 10.0 oz.
Panther Python T150, Imex 38 dish wheel, stock foam = 11.5 oz.

These weights are for one tire/wheel/foam setup.