honestly I think they are trying to find a reason, and an identity for arenacross. in this day and age arenacroos trys to be "pro" but is nothing more then an intense big pursed amatuer race. harder to sell tickets to in this economy. I think arenacross has a place, and I think 450's belong outdoors ONLY since even Stupidcross is to small for those open class machines. ANyway by only having two classes of 250's is kinda like "A and B " set up, and really is a good way for local and beginner "pros" to get thier feet wet.