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06-16-2017
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#1 |
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Join Date: Apr 2009
Location: ITALY
Posts: 261
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Rear tyre size
Hi guys,
Here in Italy we (zr1 owners) have a problem with the rear size tyre. We have an only brand who produce the 315/35/17 tyre. Me and some other guys, zr1owners, want put on the rear the 335/35/17, it's a less rare tyre and wr can choose Michelin or Pirelli. But we have an other problem, we need a "paper" where GM tell us that there are not technical problem using the bigger tyre (always on the original rim). Someone of you know how I can contact GM for have this documents? Thanks to everyone Max |
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06-16-2017
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#2 |
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Join Date: Jan 2017
Location: US
Posts: 233
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Re: Rear tyre size
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06-16-2017
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#3 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,685
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Re: Rear tyre size
Max,
I'm not sure an OEM would produce documentation on mounting anything but their recommended size tire. |
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06-17-2017
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#4 |
  
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,624
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Re: Rear tyre size
especially for a car that hasn't been produced since 95 and that gm seems to want to forget exists.
__________________
It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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06-17-2017
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#5 |
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Join Date: Apr 2009
Location: ITALY
Posts: 261
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Re: Rear tyre size
Hi guys,
Is not a problem of shipment...the problem is that here in Italy we cannot put on the car a different tyre misure if it's not written on the car technical paper named "libretto". But for this modify we need a technical relation by Gm...I hope that I explain correctly the problem... |
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06-17-2017
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#6 |
 Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,572
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Re: Rear tyre size
I would think getting that document from GM would be harder than getting our dyno sheets. GM won't put their name on it, unless it's been engineered and tested.
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06-17-2017
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#7 |
Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,446
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Re: Rear tyre size
Tire rack or discount tire websites would show fitments
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06-17-2017
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#8 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,685
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Re: Rear tyre size
What Max is saying is that in Italy, no one will sell or mount tire sizes on his wheels that do not conform w OEM spec. So in order to do so, he needs the owners manual or some other official GM document showing that the 335s can be fitted to the OEM wheel and are sanctioned by GM.
I would be very surprised if anything like that exists. |
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06-17-2017
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#9 | |
Join Date: Apr 2015
Location: Kentucky
Posts: 352
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Re: Rear tyre size
Quote:
 We've got talent, I'm sure. cheers, G
__________________
'94 ZR1 LT5 - Dark Red Metallic '79 L82 4-speeds of fun '96 LT1 Borla, H-pipe, TB, CAI (Sold) "An adventure is only an inconvenience rightly considered. An inconvenience is only an adventure wrongly considered." -- G.K. Chesterton |
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06-17-2017
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#10 |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,843
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Re: Rear tyre size
Agreed, no manufacturer will produce a "one off" letter like this. Not for a current production car let alone one that has been out of production for 22 yrs. Believe me I know. I've worked corporately for Mercedes, Hyundai and Mitsubishi.
If the OP wanted to sidestep the law in Italy, I offer this convoluted solution. Have the tires removed from the wheels in Italy, ship the wheels to a country where this is not an issue. Have tires mounted there and ship back. Or just buy wheels and tires elsewhere and ship in. Of course this doesn't save any money as the OP wanted. Isn't socialism a wonderful thing! You need government approval for everything. It's for your own protection. H |
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