when your starting out you probably won't use much tire. that is if you are actually trying to drift, not doing donuts and powersliding, your tires should last you a while. The first drift event I went to (in cali) I didn't even use half the tire all day. They were very high treadlife tires though...
Anymore i'm lucky to have the tires last a night of drifting (say .5 -1 hour of actual drifting), but I've been at it a while now....
I'm the primer grey corolla GTS (watch my vid in another post here on tr) look me up at DDay, I'll try to help and give tips...
-Jeff