my 2006 flhti is gonna need new tires soon, i am probably putting a 21" twisted spoke on the front with a 120 metzler, but i am thinking of putting something a little wider than stock on the back, just for asthetics, i was told a 150 metzler would fit fine, is this true or b.s. also my bike is lowered 1.5" any thoughts or info much appreciated