crimefighter mt's

hey guys,
just wondering how long (hour's) you think a set of crimefighter mt's will last on my CRT for bashing (some asphalt, but mainly grass, dirt, rocky ground)?
i have only run pro-line mulchers and the badlands in the past, and they seem to last forever.
i ask this because these tires came with the CRT kit and i'm not sure if i should order some losi zombie max tires now, or wait and see how long the crimefighters last.