Who has 18s on there blaster with a 8 inch rim

I'm ok with mine, you just have to really think about lines through the trails.

If you ride really rocky stuff I would stick with 20s
 
I have 18" turf tamers on mine with 21" KT931's on the front. I think I'm going to go with 20" rears when I buy tires next time.

2012-06-26202712.jpg
 
I've got 18's on mine as well. It only lowers the back about 1 1/2''. If you trail ride I'd suggest a skid plate