AE B4 and JConcepts Rulux fit and are legal. I tried old-style Losi wheels too and they fitted, but I don't know if it widens the car.
An important note though: Tamiya uses 2.0mm pins for the wheels, B4 and Rulux wheels - in fact most wheels in general - use a 1.6mm (or imperial equivalent) pin. As such, you will stretch the plastic a bit over the pin and may stay a bit stretched after prolonged use on Tamiya pins. Just make sure the pin is in the slot before tightening and the wheel will be fine
