Hey guys I have been running these tires for a while on my Schumacher and now on my Losi and I have to say that you will see them slow down at about 10 to 15 runs in stock. And it does take about 1 to 1 1/2 runs to get the tires work the best out of the package. I would think that you can race the Novak on 2 sets of tires no prob. But they do start to drop off and people that have been running them for 3 plus weeks with no drop off are fooling themselfs they do get slower some can notice it better then others is all.