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 Post subject: Re: Changing from 17 to 16 inch wheels
PostPosted: Sat Jan 02, 2016 7:22 pm 
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Joined: Mon Dec 14, 2015 11:21 am
Posts: 252
TIPEC membership: 7586
So, I've been thinking about and looking in to the offsets. I knew nothing about offsets before now, so please correct anything I've got wrong.

From what I understand the D90s the S2 would have had originally were 7j ET55 and 8j ET52. The club sport wheels are 7j ET65 and 9j ET60. So this, I think means that the hub attachment is about 1cm further from the centre towards the outside of the wheel. I wondered if the reason for this was to make a bigger space for the M030 brakes?

The result of this on my car will be that the wheels will be 1cm further in on the front and further in on the back, but less so because of the wider rear wheels.

Is this ok?
If so, is it the same on the Turbo S or did Porsche do something to reduce the effect?
Should I consider 1cm spacers or is there no point?

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 Post subject: Re: Changing from 17 to 16 inch wheels
PostPosted: Wed Jan 06, 2016 1:03 pm 
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Anyone got any thoughts on this?

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 Post subject: Re: Changing from 17 to 16 inch wheels
PostPosted: Sat Jan 09, 2016 7:30 pm 
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944 Man wrote:
Slender spacers will probably have been used for clearance on the front Boxster wheels. You can keep them (as the front 7" Fuchs wheels are too inset anyway) if you wish and I probably would providing that there is enough stud left for the nut to grip safely (this could be marginal - you need 7mm spacers from memory, but there is only enough stud for 4mm-5mm). If you don't, then make sure that the spacer is off on both sides as they can stick to the wheels or the hubs.


Thanks for the info above 944 Man, really you already answered my question about whether spacers would be needed with the different offsets.

Interestingly though it turned out that the neither front or rears had spacers to fit. I'm not sure they are genuine Porsche, if that makes any difference. Although they are too dirty at the moment to see many markings on the inside.

The club sport wheels went on fine without spacers and look great to me. I wonder if the wider front tyre (225/55) has something to do with it. Anyway the car now looks a bit more how it was intended but with the wider back wheel (which is what I was looking to achieve). And it is handling better, smoother ride and not tram-lining like it seemed to with the other wheels on.

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