They might be. I used them on my IGT2, and it made a huge difference in handling. The car hooked up with those tires. My LHS said that he's been trying to get more, but said they discontinued them.
Tamiya 416X/ Tamiya TA-05 IFS/ Losi XXX-SCT/ HPI Baja 5SC/ Tamiya M05/ Tamiya F103/ Tamiya F104/ Team Associated 10R5O/ Kyosho IGT2/