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    Mar 20, 2006 1:46:12 PM

    Georges G. Hayek
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    Georges G. Hayek
    Loc: Beirut , Lebanon
    Posts: 650, Gallery
    Registered on: Feb 1, 2006

    Can we install 305/30 tires for the rear 19" wheels?

    I was checking the Tequipment catalogue and noticed that the 997 c4 comes with a 305/30-rear tire. Can we install it on our 997 c2, since we (c2/c4) have the same wheel diameter / size...?

    Mar 20, 2006 4:49:27 PM

    Spindar
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    Spindar
    Loc: early morning drive , New Zealand
    Posts: 59, Gallery
    Registered on: Oct 20, 2005
    Reply to: Georges G. Hayek

    Re: Can we install 305/30 tires for the rear 19" wheels?

    My dealer says yes

    Mar 20, 2006 6:04:51 PM

    Matt C
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    Matt C
    Loc: Switzerland , Switzerland
    Posts: 1092, Gallery
    Registered on: Apr 28, 2003
    Reply to: Spindar

    Re: Can we install 305/30 tires for the rear 19" wheels?

    Actually, the Carrera Sport (XRR) are of that dimension. So if the XRR are available for the C2 (and not just for C2S), then yes, you can. And I can't see any good reason why these rims would only fit the "S".

    Mar 20, 2006 9:48:16 PM

    devo
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    devo
    Loc: NY , United States
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    Registered on: Jan 31, 2006
    Reply to: Georges G. Hayek

    Re: Can we install 305/30 tires for the rear 19" wheels?

    Quote:
    Georges G. Hayek said:
    I was checking the Tequipment catalogue and noticed that the 997 c4 comes with a 305/30-rear tire. Can we install it on our 997 c2, since we (c2/c4) have the same wheel diameter / size...?



    Yes you can, however, the XRR wheels are 11.5 and 8.5, rear and front, respectively. Many good sources suggest that you use an 8.5 " front wheel as opposed to the 8.0". Even though the tire size is the same, with both wheels, the extra 1/2" does, reportedly provide less understeer.
    There have been some reports of drivers feeling that with the 8" wheel (front) and the 305mm tire in the rear, that their cars felt slightly "squirrley". Porsche does add 1/2" to the front and rear when using the 305 out back, so maybe there is some truth to it. (Obviously, whether fact or fiction, the reason being that there is supposedly more tire patch, even if it is only 2/8 ths of an inch, when using the wider rim.)
    I am considering the same combo, however, I will only do it with the wider wheels fore and aft, mounted on aftermarket wheels.

    Mar 20, 2006 11:31:17 PM

    jeffbco
    Pilot
    jeffbco
    Loc: Denver
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    Registered on: Mar 18, 2006
    Reply to: devo

    Re: Can we install 305/30 tires for the rear 19" wheels?

    I've got a C4S Coupe with Carerra S wheels (8" F and 11" R). Are the Carerra Sport wheels (8.5" F and 11.5" R) a straight swap - no spacers, etc? Thanks.

    Mar 21, 2006 12:20:22 AM

    Dan L
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    Dan L
    Loc: Santa Barbara, CA , United States
    Posts: 1957, Gallery
    Registered on: Jan 2, 2006
    Reply to: jeffbco

    Re: Can we install 305/30 tires for the rear 19" wheels?

    Quote:
    jhbrennan said:
    I've got a C4S Coupe with Carerra S wheels (8" F and 11" R). Are the Carerra Sport wheels (8.5" F and 11.5" R) a straight swap - no spacers, etc? Thanks.



    They should be a straight swap out,--with an added note that no 5mm spacer is allowed with the Carrera Sport rims (XRR).

    Dan

    Mar 21, 2006 3:12:58 PM

    Dilinger
    Rennteam Pro
    Dilinger
    Loc: Athens,Greece , Greece
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    Registered on: Dec 23, 2004
    Reply to: Dan L

    Re: Can we install 305/30 tires for the rear 19" wheels?

    but there is the 17mm option with the XRR wheels

    Mar 21, 2006 6:24:02 PM

    Dan L
    Expert
    Dan L
    Loc: Santa Barbara, CA , United States
    Posts: 1957, Gallery
    Registered on: Jan 2, 2006
    Reply to: Dilinger

    Re: Can we install 305/30 tires for the rear 19" wheels?

    Quote:
    DILINGER said:
    but there is the 17mm option with the XRR wheels



    the 17mm option is only found on the Carrera 4 and 4S cars. 17mm spacers on the normal narrow bodies will push the XRR wheels out way too far.

    Dan

    Mar 23, 2006 11:22:32 AM

    Dilinger
    Rennteam Pro
    Dilinger
    Loc: Athens,Greece , Greece
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    Registered on: Dec 23, 2004
    Reply to: Dan L

    Re: Can we install 305/30 tires for the rear 19" wheels?

    yes i know that , i thing its way too much in my opinion..
     
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