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Thread: Rear wheel clearance

  1. #11
    Registered Member chevynut's Avatar
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    Quote Originally Posted by El 56 View Post
    Here is my homemade tool I used. Please let me know if u think I will be ok. Mind you that the 11” flat stock was replaced with a 10” flat stock and remeasurd everything. Thanks.
    I noticed you were measuring out at 14" or so....that's not where the tire is widest. I'd come back 2-3" in radius to locate the widest part of the tire.
    56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension


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  3. #13
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    A 255/60-15 would be the safest fit at 27 inches tall, 10.2 overall section width, with 8.2 inch tread width. I think it is a good fit for a tri-five which sits on the same wheelbase as the heavier 94-96 Impala SS which ran the similar dimensions in a 255/50-17. Those were one of GM's best overall performing full-sized cars ever built. And compared to that my 13 Tahoe police pursuit on the same wheelbase even heavier runs a rare size of 265/60-17 tire, and they kick ass, Other than they are government priced at $1600 for a set of 4.
    Last edited by 55 Rescue Dog; 01-19-2018 at 03:42 AM.

  4. #14
    Registered Member NickP's Avatar
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    Quote Originally Posted by 55 Rescue Dog View Post
    A 255/60-15 would be the safest fit at 27 inches tall, 10.2 overall section width, with 8.2 inch tread width. I think it is a good fit for a tri-five which sits on the same wheelbase as the heavier 94-96 Impala SS which ran the similar dimensions in a 255/50-17. Those were one of GM's best overall performing full-sized cars ever built. And compared to that my 13 Tahoe police pursuit on the same wheelbase even heavier runs a rare size of 265/60-17 tire, and they kick ass.
    FYI, the wheelbase is 115.9 on the Impala and 116 on the Tahoe, much like the one in my garage.
    Last edited by NickP; 01-18-2018 at 07:05 PM.

  5. #15
    Registered Member chevynut's Avatar
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    WTF does wheelbase have to do with tire size? You put the widest tire on the car for the best performance....that's a 275 on the rear of a stock tri5. Anything less is sub-optimal.
    56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension


    Other vehicles:

    56 Chevy 2-door BelAir sedan
    56 Chevy 210 4-door sedan
    57 Chevy 210 4-door sedan
    1962 327/340HP Corvette
    1961 Willys CJ3B Jeep
    2001 Porsche Boxster S
    2003 Chevy Silverado 2500 HD Duramax
    2019 GMC Sierra Denali Duramax

  6. #16
    Registered Member chevynut's Avatar
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    Quote Originally Posted by 55 Rescue Dog View Post
    94-96 Impala SS which ran the similar dimensions in a 255/50-17. Those were one of GM's best overall performing full-sized cars ever built.
    Isn't it amazing that nobody, anywhere, has ever touted the awesome performance of those boats? LOL
    56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension


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    56 Chevy 210 4-door sedan
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    1962 327/340HP Corvette
    1961 Willys CJ3B Jeep
    2001 Porsche Boxster S
    2003 Chevy Silverado 2500 HD Duramax
    2019 GMC Sierra Denali Duramax

  7. #17
    Registered Member El 56's Avatar
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    Good info. Thank you all!

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    Quote Originally Posted by chevynut View Post
    WTF does wheelbase have to do with tire size? You put the widest tire on the car for the best performance....that's a 275 on the rear of a stock tri5. Anything less is sub-optimal.
    It was more of a overall vehicle size comparison, with a couple vehicles that perform well that don't use a 275 wide tire. I couldn't say exactly what would be better performance wise between a 255 vs 275, but besides clearance issues, the 275 is only about 1/2 in wider, but 1 inch taller at 28in , and 3 pounds heavier if that helps a lot for performance.
    A 255 tire is close to twice as wide as a "stock" tri5 tire. I like big tires too, but a 275/60-15 is maybe a bit much, and harder to find a matching front tire with similar performance for cornering/braking, I think. Tire construction, and rubber compound are more important than just a small difference in the width.
    Is it really necessary for you to act an internet bully, and cuss me out, or anyone else, in so many of your replies???
    Last edited by 55 Rescue Dog; 01-19-2018 at 04:47 AM.

  9. #19
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    Quote Originally Posted by chevynut View Post
    Isn't it amazing that nobody, anywhere, has ever touted the awesome performance of those boats? LOL
    If you had ever driven one you would know what I mean. I've had a 95 and 96 Impala SS, autocrossed them both, and they are very impressive for a boat. It would be very difficult to build a tri5 that even come close as far as handling/braking. A C4 conversion chassis probably won't. A tri5 definitely beats it on looks though.
    Last edited by 55 Rescue Dog; 01-19-2018 at 04:26 AM.

  10. #20
    Registered Member BamaNomad's Avatar
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    Quote Originally Posted by chevynut View Post
    Isn't it amazing that nobody, anywhere, has ever touted the awesome performance of those boats? LOL
    Actually, at the time, magazines DID tout the performance of the Impala SS .. With the LT1 engine, they ran very well, and the car itself has been a 'collector' car almost from day 1, and still is today; there are Impala SS clubs all over the country (except for perhaps in northern Colorado??)..

    In 1996, I test drove one for a weekend, and might have bought it except for the 'trunk space', if you can believe that! They put a full size spare in the trunk which reduced the available trunk space to much less than I had with my Intrepid ES, and for a family car which the wife mostly drove, trunk space is important.
    Last edited by BamaNomad; 01-19-2018 at 06:02 AM.

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