What type of tires are these.

They look like 40 series Mulchers.

They look like Maxx size mulchers [&:]

edit.. after a 2nd look, they look a little narrow compared to the PL Maxx mulchers [sm=50_50.gif]

Are they okay for racing

I think they are more aimed for bashing and rough terrain work. I'd aim to get Bowties or Crimefighters, something along those lines if you plan on racing. They'll provide more grip on the dirt of the track, check out www.prolineracing.com and check for what they have.