Do any of you that run Diamonds on your 1st gen run a hub centric ring or anything? I have some and one wobbled bad, took it off and never tried again, figured it was slightly bent but can't find a bend. Since they're not hub centric wheels I wasn't sure if they required any messing with or not.

 

If it wobbles while driving maybe its balanced wrong

 

You need to make sure the torque ring around the outside of the bolt pattern is flat against the rotor or spacer. I had a friend try a set on his FC and he happened to try some spacers at the same time. The spacer was slightly smaller than the raised torque ring of the rim center and it acted like a clown car.

We have 3 sets we use on an FB and 2 sets on an FC

 

I always had a bit of wobble with mine, but more than good enough for autocross...



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I love the way the Diamond's look on the 7's, I hope you get your issue figured out.

 

This was bad enough as I was leaving our paddock my brother had to run down to the grid after me thinking my wheel was going to fall off.

I have Panasports but want the Diamonds to have rain tires mounted, luckily they're cheap if I only need one.

 

I never had problems with mine, loved 'em. They were just heavy as all get-out.

A hubcentric ring would be pointless-to-counterproductive. The tapered lug nuts are what hold the wheel centered, being hubcentric just makes it easier to not screw up putting the lugs on. And Diamonds don't really have a guaranteed concentric hub hole anyway, which is why they tell you that you can only balance them with an adaptor that locates off of the lug holes. I was fortunate in that the wheels I had were so close to center that I could balance them the normal way, but this was more of a happy accident than anything else.

 

Diamonds are lug centric and have to be balanced on a machine that references the lug holes and not the hub hole. Look for a shop wth a higher end Hunter road force balancer - they mount the wheels by the lug holes.

I had the cheaper non-spun diamonds (13x7s) for rains and they never balanced as well as the panasports I used. Fortunately I never went as fast in the rain so it wasn't a huge issue.

Regarding hub centric wheels and centering wheels on the hub. In club racing we have found this to be significantly worth it. A friend of mine ran Real 3pc Wheels on his EP car for several seasons. These wheels have a large hub bore and he did not have centering rings for them. So they where centered by the lugs only. What we noticed was that the wheels were walking around on the hub face even though they were properly torgued. The lug studs (ARP's) were flexing and allowing the wheels to move. The solution was centering rings so that the wheel became hub centric.