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Fitment of Corvette wheels on 4th gen

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  • Fitment of Corvette wheels on 4th gen

    Just a little info for those trying to decide on an upgrade on 4th gens. I replaced my wheels and tires on my 2000 Z28 this summer with 18x10.5 rear and 17x9.5 front ZO6 style wheels with 56mm offset. I was going to buy BFG again but Discount Tire jacked me over on price quoted one price then jumped it $200 just 4 weeks later. So I ended up with Bridgestone Potenza from Firestone in Centerline rear size is 295/35-18 fronts are 275/40-17. If I was to do it again I would go smaller on the front either 255/40 or 265/40 as the side wall on the 275 looks taller than the rears but they fit fine. The only thing that needs to be done for fit on the rear is to trim the axle bump snub bracket on the drivers side rubbed when hard cornered or car was lifted on the hoist. A week after installing we were able to run 4 semi fast laps at Waterford Hills and they grip like you are on rails. So far no problems and they gripped Jake's dyno to give me 320hp/334tq at the wheels with no major mods not even headers ) Phil really did a great job on the tune I would recommend him anytime !!
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  • #2
    I always thought the second number is sidewall height. 40 would be higher than 35.
    sigpic
    1998 Trans Am Convertible A4 - WS6 hood, WS6 air lid, WS6 rims, drilled/slotted rotors.

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    • #3
      The first number refers to the width in mm the second number is the aspect ratio (percentage wise so the side wall is only 40% as tall as the tread width) so the higher the number the taller the sidewall will be Stock sizes on the ZO6 Corvette were 295/35x18 and 255/40x17

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