New here will a 114.3 mm and 45 offset size `8inch fit my sc430 bore is 73mm Thanks Jim

 

These are 18inch not 8 inch sorry about that

 

I belive it should. Sc430 center bore is 60.1so you should get hubcentric rings.

 

I think thats the size/offset from the factory, if not, it's very close. ShawnOk is correct about the bore, so I would suggest the hubcentric rings also, this will help eliminate vibrations from the wheel

 

Where do I get hub centric rings and are there a special number to order

 

Ebay usually has fair priced hubcentric rings. I recommend the aluminum metal ones. You will need to search for hubcentric rings that go from 73mm to 60.1mm. I've linked one just as an example.

http://www.ebay.com/itm/4-Hub-Centri...xWHJyo&vxp=mtr

 

will this ring work or do I have to get exact size example the wheels I am looking to buy have a bore of 70 and the standard bore on the sc is 60 so do I need to find 70 x 60 hubcentric rings

 

I have 20 " donz rims on my sc they are staggered

front 20 x 8.5 35 offset tires toyo t1 proxies 245/35ZR20
rear 20 x 10 38 offset tires toyo t1 proxies 275/30ZR20

I bought rims from ebay they came off a sc430 included tire pressure sensors. as well as plastic
hub centric rings.

Question the rings are a very hard plastic and I don't feel any vibration after I get the tires warmed up Car sits a lot so I may have flat spots. Would it be better advised for me to switch to the aluminum hub centric rings I see on ebay 73.1 to 60.1 and swap out my plastic ones.

Opinions please

I don't know what size the plastic hub centric rings are that are now on my car can I assume that they the correct size is the 73.1 x 60.1 ???

 

Hubcentric rings are generic. They will work with all wheel manufacturers. Most wheels are standardized so I'm sure you might believe them to be 73 but they should be 73.1. and the SC430 is def 60.1. So those I've linked, or similar, would be the ones you will need. If you go with another set of rims then you will have to find the proper rings for that set. If you're sure the new set of rims has a 70, then you would have to find a center bore of 70 to 60.1 ring set (Although I've never seen at 70 center bore).

As for the debate of plastic vs aluminium. I had plastic before and when I change my tires every season, the mechanics always have problems popping the plastic ones off my hubs. They would get ruined in removing them, so I went with metal. Now a gentle tap with a hammer and the metal ones are removed easily. But I am the exception as I have two sets of rims with different center bores. One set is 73.1 and the other is 66.6. So I needed two sets of rings.

 

...and I'm on the other side of the spectrum....lol....I have the plastic ones & haven't had an issue with them. I'm really not sure if one is better than the other, it might just be a personal preference.