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Boxsey
Watkins Glen


Joined: 28 Jan 2007
Posts: 2227
Location: Part of the NorthWest Crew

1990 Porsche 964 Carrera 2

PostPosted: Fri Dec 14, 2007 8:49 pm    Post subject: Tyres and the 964 Reply with quote

The recommended cold tyre pressures for 16 and 17 inch wheels are shown in the attachment below which is taken from the Porsche and Michelin tyre guide (published at the end of 2006).

Note that there is no listing for 18 inch wheels for any 964 model. Therefore the pressures for 18 inch wheels need to be taken from later 911 models. The same tyre guide lists the pressures for 18 inch wheels fitted to a 993 (all except the GT2) as being 36 psi (2.5 bar) at the front and 44 psi (3.0 bar) at the rear.
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Steve

Racing Yellow Cayman GT4

History of my now gone 964
 
  
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catfromouterspace
Newbie


Joined: 06 Aug 2007
Posts: 6
Location: Bristol UK


PostPosted: Mon Jan 14, 2008 7:19 pm    Post subject: 18" alloys on 964 Reply with quote

Does anyone have a link that explains pros and cons of fitting 18 inch alloys on a 964 911? I'd like some larger wheels but don't want to run into issues when changing from the standard ones.
 
  
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matt_964
Loser


Joined: 24 May 2007
Posts: 1329



PostPosted: Tue Jan 15, 2008 6:54 pm    Post subject: Reply with quote

i'd say the only pro's are looks, if you are into that kind of thing, and the ability to fit bigger brakes.

cons - ride quality suffers, cant lower it as much, tyre availability \ price?
 
  
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Porsche
Brands Hatch
Brands Hatch


Joined: 31 Dec 2002
Posts: 13050
Location: Nürburgring Nordschleife

2003 Porsche 996 GT3 Mk2

PostPosted: Tue Jan 15, 2008 7:09 pm    Post subject: Reply with quote

Pro

Better looks
Handling Performance benefit from greater surface contact area
Performance benefit from lower profile i.e. less roll

Cons

Extra Cost
Extra Weight
Handling direction change / agility loss from increase in surface contact area
Reduction in extreme weather ability
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