What size rims do a blaster have on them? looking on Rocky Mountain ATV and they say that they have 21x7x10 on the front so I assume 7x10 rims but does it matter if the rims are 10x7? I know it's a really dumb question but I've got absolutely no experience in the area of tires and rims. The rear is 21x10x8 on rocky mountain. I am running on stock rims and just need some cheaper rims to upgrade to because the guy I got it from dented the hell out of the rims.