my H1 38 Sx combo runs down the freeway fine. I balanced them once at Jack it. Never did it again.
H1's recentered, I got them from USA 6x6 several years ago. They can say what they want about his work. My wheels have been great. If anyone was going to break them, it would of been me...
OOpps! two piece PVC inserts... Is yours a one piece? If they are, do they set tight on the wheel?