Z4-forum.com

Hi All,

Does anyone know if the Roadster S wheel nuts are the same as standard BMW Z4 E85 ones please? I know they appear to have their own Alpina part number but without taking one out I cant compare them to standard ones? At £20 each its an expensive job to change all 16 on top of the £80 I've already spent on Alpina lock nuts.

Any help would be appreciated and apologies if this has been covered in an earlier thread somewhere...

Cheers

It's a Z4. I can't think of any reason why they would not fit. Though they may well look different to the trained eye.

It's just the fact they've got an Alpina Part # that's making me think differently mate.

I might just have to take one out when I head to Sytner's tomorrow and compare the two if no one has a definitive answer this evening.

Cheers Mate

They may have a different shoulder profile (angle) and possibly length to standard.
I could check mine against the E89 for you but I have Classic wheels, not Dynamics so they may also be different.

I can swap one of mine to check for thread sizing and length if that helps a bit? It may not as neither of my cars is the same as yours (E92 and E89).

Once you confirm what bolts you need, you will be able to buy them from eBay for example at around £1.00 each.

Thanks for this mate, please don’t go to any trouble I’ll drop one out and compare at Sytner tomorrow. I’m always a bit dubious about using none genuine parts especially on wheels etc but guess as long as the profile is a perfect match they all do the same job.

I’ll keep you posted and thanks again for your help.

Cheers

H14ytr wrote: ↑Thu Mar 03, 2022 7:26 pm I’m always a bit dubious about using none genuine parts especially on wheels etc
Cheers

A bolt is a bolt is a bolt TBH. The correct torqueing is far more important than the bolt itself, as over-tightening stretches the threads and hence weakens them. I would expect the shoulder profile to be pretty standard. I think the reason for the Alpina specific part number is that it is an 'accessory' to the Alp specific wheels.
£20 each is daylight robbery.