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ditchvisitor
Newbie


Joined: 09 Oct 2017
Posts: 37
Location: Oxfordshire


PostPosted: Wed Dec 06, 2017 5:08 pm    Post subject: 996 GT3 MK1 Cup 2 sizes Reply with quote

I've done a fair bit of searching however I've not found anything specific, I'm looking to work out what size Michelin Pilot Sport Cup 2's I should be fitting to my MK1 GT3, it's currently got Pirellis on it in 285/30/18 and 225/40/18 any help or advice would be much appreciated.
Thanks
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Pip1968
Suzuka


Joined: 26 Oct 2009
Posts: 1072
Location: Blighty


PostPosted: Wed Dec 06, 2017 5:23 pm    Post subject: Reply with quote

Same size I would have thought Confused

If they dont do the fronts in you size you may have to stretch to 235/40/18.

Personally I would hold off on Cup tyres until the track season starts again although I gather they are better than the original Cup tyres for wet weather. Michelin PS2 maybe (I gather we may be on a later iteration now) or winter tyres would be a better bet now.

Pip
 
  
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jkeith
Nürburgring


Joined: 22 Jan 2010
Posts: 466
Location: Jesmond


PostPosted: Wed Dec 06, 2017 5:29 pm    Post subject: Reply with quote

The tyre sizes quoted in The 911 GT3 (A3 size white hardback) are 235/40ZR18 on 8.5J front and 295/30ZR18 on 11J rear.

Not sure if this helps.

Cheers, Keith.
_________________
2005 996 GT3
1986 944 turbo (now for sale)
1986 Grand Prix White 3.2 lhd whaletail
2005 BMW 325 M sport
968 Clubsport (sold)
964 (low mileage, (sold (sadly) to an enthusiastic neighbour)
 
  
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Pip1968
Suzuka


Joined: 26 Oct 2009
Posts: 1072
Location: Blighty


PostPosted: Wed Dec 06, 2017 6:30 pm    Post subject: Reply with quote

jkeith wrote:
The tyre sizes quoted in The 911 GT3 (A3 size white hardback) are 235/40ZR18 on 8.5J front and 295/30ZR18 on 11J rear.

Not sure if this helps.

Cheers, Keith.


I think GT3 Mk I has slightly narrower front rims. - 8J ?

From Rennlist:
Mk1 Fronts 8J X 18 ET 52 11.5 Kgs
Mk1 Rears 10J X 18 ET65 13.1Kgs

Mk2 Fronts 8.5J X 18 ET40 12.25Kgs
Mk2 Rears 11J x 18 ET63 13.6Kgs

Pip
 
  
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jkeith
Nürburgring


Joined: 22 Jan 2010
Posts: 466
Location: Jesmond


PostPosted: Wed Dec 06, 2017 6:47 pm    Post subject: Reply with quote

Thanks Pip for clearing up the detail.

Cheers, Keith.
_________________
2005 996 GT3
1986 944 turbo (now for sale)
1986 Grand Prix White 3.2 lhd whaletail
2005 BMW 325 M sport
968 Clubsport (sold)
964 (low mileage, (sold (sadly) to an enthusiastic neighbour)
 
  
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Marky911
Suzuka


Joined: 04 Jun 2009
Posts: 1069



PostPosted: Wed Dec 06, 2017 7:22 pm    Post subject: Reply with quote

Hi DV,

Those are the factory Mk1 GT3 sizes for the factory 8" fronts and 10" rears.
So stick with those and it's as it was when it was new. Thumb

All the other info above is correct too. Mk2s went wider.
Mk1 Carreras had 265 rears on the same 10" rim but most people move to the Mk1 GT3 size of 285 for a squarer profile.

Good info here -

http://apexgt3.blogspot.co.uk/2008/11/early-mk1-porsche-996-gt3.html?m=1
 
  
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ditchvisitor
Newbie


Joined: 09 Oct 2017
Posts: 37
Location: Oxfordshire


PostPosted: Wed Dec 06, 2017 9:16 pm    Post subject: Reply with quote

Thanks guys, really appreciate the help, will stick with the standard sizes then, now to find the cheapest place to get them from!
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MJA911
Indianapolis


Joined: 10 Dec 2013
Posts: 2494
Location: Berkshire

2006 Porsche 997 GT3

PostPosted: Thu Dec 07, 2017 8:44 pm    Post subject: Reply with quote

Recently checked pricing for Cup2 and Camskill were best so worth including them in your search I would say.
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