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Alloys question - offesets, PCd and centre bore

How much leeway is there in buying a set of alloys with different dimensions than standard?

Say standard dimensions are PCD 5 x 110, offset 41mm CB 67mm

What is the max variation (safe) in PCD, offset and CB?

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Re: Alloys question - offesets, PCd and centre bore

Tried my wheels of my VXR last week as the hubs are made by GM.
they would have fit if it wasn't for the Brembo brakes on the front. I am going to fit H&R spacers to get around the problem. The difference in the offset on my wheels will be tacken up via the spacer so the wheel position will be very near the same. Probably next year now as Chrome and salt dont go
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Re: Alloys question - offesets, PCd and centre bore

Centrebore would have to be the same or bigger (and use spigot rings)
If you really wanted to you could use wobbly bolts to accommodate wheels with a pcd of 108 or 112, if you really, really wanted something much different you could have some adaptor plates made. but then its all about the relationship between the brake caliper, the suspension struts, the wheel arch and the hub face. I understand that you can get away with 5mm spacers on standard 18" wheels so therefore an offset of 35mm on 71/2" rims works.

The modern vauxhalls with 110mm pcd have the right centrebore, pcd and offset to be accommodated. But to be honest, even the big irmscher wheels are boring and overpriced.

However, the thought of perhaps 20" wheels being kept central by a bit of plastic with bolts that allow the wheel a couple of mm play with 200bhp+ scares me!
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Re: Alloys question - offesets, PCd and centre bore

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Originally Posted by andypj View Post
However, the thought of perhaps 20" wheels being kept central by a bit of plastic with bolts that allow the wheel a couple of mm play with 200bhp+ scares me!
Good point - I've got about 350bhp (so far) so I'll think I'll have to stick with 5 x 110 and same centre bore - OZ's but they are bloody expensive
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Re: Alloys question - offesets, PCd and centre bore

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Originally Posted by banny69 View Post
Good point - I've got about 350bhp (so far) so I'll think I'll have to stick with 5 x 110 and same centre bore - OZ's but they are bloody expensive
You're right - but if you do get them you'll look at them and realise they were worth every penny! Then you'll get in it, drive it and think you'd be prepared to pay double!! (OK so the last bits a bit OTT!!!!)
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