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rims and lowering

This is a discussion on rims and lowering within the Wheels and Tires forums, part of the General Help category; i was wondering if i got the new c6 rims 18 x9.5 ( 275 or 285 tires) all around and ...

  1. #1
    Member homerunhtr21's Avatar
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    rims and lowering

    i was wondering if i got the new c6 rims 18 x9.5 ( 275 or 285 tires) all around and then put a por-kit on if I would have any problems with clerance or rubbing of the tires?

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    Crazy Canuck ! Eugenio_SS's Avatar
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    i'm assuming you are talking about the prokit springs ?
    there should be no issue, because although you go to 18", if tires chosen properly, such as a 275/35-18, it will have the exact same size as the stock 275/40-17... only difference being you have 1" more of wheel and 1" less of sidewall... but in the end... it's exact same size.
    btw, you recall the offset on those wheels ?
    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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    Member homerunhtr21's Avatar
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    Quote Originally Posted by Eugenio_SS View Post
    i'm assuming you are talking about the prokit springs ?
    there should be no issue, because although you go to 18", if tires chosen properly, such as a 275/35-18, it will have the exact same size as the stock 275/40-17... only difference being you have 1" more of wheel and 1" less of sidewall... but in the end... it's exact same size.
    btw, you recall the offset on those wheels ?
    57MM ..I THINK

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    Crazy Canuck ! Eugenio_SS's Avatar
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    that means you'll need ~ 1/4" spacer.

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    Member Jon7I2's Avatar
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    Quote Originally Posted by Eugenio_SS View Post
    i'm assuming you are talking about the prokit springs ?
    there should be no issue, because although you go to 18", if tires chosen properly, such as a 275/35-18, it will have the exact same size as the stock 275/40-17... only difference being you have 1" more of wheel and 1" less of sidewall... but in the end... it's exact same size.
    btw, you recall the offset on those wheels ?
    40mm sidewall to 35 mm sidewall equals a 5 mm difference, and a 5 mm does not equal 1 inch, and neither does 17" wheels to 18". The circumference is one inch different or greater, but not necessarily the height of the wheel. A 17 wheel is not 1 lower than an 18 wheel.

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    Quote Originally Posted by Jon7I2 View Post
    40mm sidewall to 35 mm sidewall equals a 5 mm difference, and a 5 mm does not equal 1 inch, and neither does 17" wheels to 18". The circumference is one inch different or greater, but not necessarily the height of the wheel. A 17 wheel is not 1 lower than an 18 wheel.
    The 40 and 35 are not millimeters; it is aspect ratio. 275/40/17 means the sidewall is 40 percent the width of 275 millimeters.

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    Member Jon7I2's Avatar
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    oh ok, i see.

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