I've been using motometal 951 rims for over a year now and I wasn't able to solve the vibration issues... I asked about hub rings before to the store I've bought these but they said I don't need them...

Today another tire service says I definitely need them but couldn't find the right size for it, they even called the company to ask about it but the person on the line didn't know the size... Anyway;

Do any of you guys know what size hub ring I need with these wheels on a 2002 Durango? These vibrations are driving me crazy...