Hubcentric rings

Have a shake at 50mph, never really did anything about it as I was planning on buying new wheels. Have bought new wheels but the same problem exists. I want to try hubcentric rings first before the more serious stuff involving bushes and thrust arms. But Im having trouble trying to find somewhere to get them.

Can someone tell me where I can get hubcentric rings from, whether mailorder or from a shop in the South East.

I've just received some hub rings that I bought off e-bay, they are listed under spigot rings. The guy was really good when I spoke to him on the phone. Euro Car Parts say they don't do them anymore.

Yes, I must admit to being a little sceptical about the quality and I do think they are a bit flimsy for what they cost but, surely, when they are on the car and pressed into the wheel, they will form a tight bond onto the hub, taking up the gap which would have been evident if the rings were not used, eliminating a major imbalance issue. 

Bubble.

has anyone got a picture of these things  .....???? how much do they cost?? as iam based in the enginering trade id be intrested to know about these things ...if there best for them to be precisely made rather than cnc/mass machined   id like to know as i mite get some made

any help guys  ??

thanks in advance

its resonance; the same reason a pendulum swings at a constant rate*. Any spring system with a mass attached will try and resonate, only damping will stop it. An out of balance wheel will exert a radial force of many kgs at speed, and at the correct speed it will excite a natural resonant frequency in the suspension and the result is a wobble.

If the wheel is off centre by 0.2mm this would be as bad or worse than taking all the balance weights off typically.....

*- or a shopping trolley castor flaps wildly......

cheers

Im assuming here, but this must be a widespread problem with any after market alloy on any car where the alloy has a larger hub size to make it more compatible....so I think its a little worrying assuming the above, that when I went into BMW and described my problem the man on the service counter said it could be balancing or something more serious to do with the suspension. Went down the road to a tyre shop that the dealership recommended and had the alloys balanced (probably needlessly), this time they can actually see that non OEM alloys are fitted but there is no mention of incompatible hub sizes and the need for hubcentric/spigot rings (and this place even sells alloys so must be aware of the problem and its symptoms). Does this point at widespread ignorance of a easily fixable problem or just 'rip off Britain'

But, of course, if my assumptions about how common this problem are is wrong, then ignore my ramblings