HE have two ports.. Most people run sevens all around, few have done eights.. gotta make a little more room to fit eights but everyone who has says it makes a smoother ride and uses less p.s.i. Some even do sevens up front and eights out back. But, like i said.. most are sevens all around. REs are very popular.. some people prefer other brands. I will say this tho as far as brands go, never heard anything bad about an RE.. but on my facebook news feed i see all the time other brand bags blowing out... usually on the way to a show...lol