As for rubber tire options I noticed Kyosho DRX wheels are 12mm hex and the axle is 6mm, correct, so basically these would fit FW04 paired with 12mm traxxas 12mm wheel hexes for 6mm axle. Not optimal but for parking lot racing would propably do. There was also information that proline 2.2 road rage tyres would fit kyosho DRX wheels..