i'm at 7.5 and you got a solid 50 pounds on me dude. go 9, unless your dins only reach 10, in which i would not advise to crank em to the max. it's bad for the springs. your dins are always supposed to be set in the middle of their range. but, in this situation, i'd say you need a din range that hits maxes out at 12 and you should set em to 9