ive read the banshee rear is 3 3/4"wider i believe. but you also need to consider if your getting banshee hubs and using banshee wheels or not. Banshee wheels use another 1" offset over blaster wheels. so total with banshee hubs and wheels if im correct about the axle is 5 3/4 inches wider. So with banshee hubs 3" arms for 6" overall width would be best, and with stock rear hubs and wheels 2" for 4" overall width would be best. another thing to consider is if you flipped your front wheels or have aftermarket or stock wheels. i have asr 3+1 front a arms, itp offset front wheels a dominator axle set at +7 and banshee hubs with banshee offset itp rear wheels. with this setup my rear is 1" wider then front.