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315's or 275's

This is a discussion on 315's or 275's within the Wheels and Tires forums, part of the General Help category; I want to get some 315's Nitto's for the rear of my WS6 Trans Am..Will they fit with no problem ...

  1. #1
    Junior Member
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    Navy Blue Metallic
    2001 WS6 Trans Am

    315's or 275's

    I want to get some 315's Nitto's for the rear of my WS6 Trans Am..Will they fit with no problem or do I have to alter something? How about the offset and aspect ratio?

  2. #2
    Sold: LS1 '85 El Camino ls1camino's Avatar
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    2000 Grand Prix GTP
    2000 Trans Am WS6 M6

    How wide are your wheels? I think you need at least 10.5" wide wheels to SAFELY run 315s, and that requires a little grinding of the bump stop to make them fit.

  3. #3
    Firebird Encyclopedia 9T8W66's Avatar
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    Navy Blue Metallic
    `98 Formula M6 HdTp

    I've seen 315's installed on 9" wheels but it is unsafe and not reccomended
    Craig
    Semi Retired Street Racer
    2012 Lava Red Mustang GT Coupe Brembo/3.73's
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    NBM `98 Formula M6 HdTp
    1 of 1 Build Date 3/12/98

  4. #4
    Something Diabolical... chuckie669's Avatar
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    2000 C5 Torch Red

    Quote Originally Posted by ls1camino View Post
    How wide are your wheels? I think you need at least 10.5" wide wheels to SAFELY run 315s, and that requires a little grinding of the bump stop to make them fit.
    I have an 11" wheel which required cutting back the bump stop. I believe Luos is running 315's on his TTII's without any bumpstop mod. All depends on your offsets.

  5. #5
    Member Justin93's Avatar
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    PEWETER METALIC
    2002 CAMARO Z-28 M-6

    how much offset do you need? Im eyeing a set of Grandsport zr-1s . 17x9.5 fronts and 17x11 rears and 315 tires.

  6. #6
    Something Diabolical... chuckie669's Avatar
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    2000 C5 Torch Red

    http://www.oeconcepts.com/2009/5035b.html

    Here's a link to the one I purchased (hope I can link this). It requires the bumpstop mod, and now that it's lowered I need to roll the fenders. Good wheel though.

    I have had them for 8mo before lowering and as long as you jack the car up from the rear axle, no problems. I actually find this method easier, since I have SFC installed and jacking from the sfc lifts half the car.

  7. #7
    Crazy Canuck ! Eugenio_SS's Avatar
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    triple-black
    2000 CamaroSS convertible

    it's 315/35-17... it will have the exact same overall diameter as the stock tires.
    I race w/ the 17x11 ZR1 +50mm offset on all corners... used to have them on the street too.
    Eugenio_SS
    almost stock triple-black 2000 SS convertible with 17x11s on all 4 w/ 315s at the track or on the street with 18x10.5s on all 4 w/ 315s: (1), (2)

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