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Skinnies.

Discussion in 'Racing and Driving Techniques' started by Tait72, Mar 12, 2015.

  1. Tait72

    Tait72 Member

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    Is there a standard size tire to run on a rear skinny? I have 24's and 26's just wondering what to mount.
    No one around here has skinnies so not much to go on.
     
  2. get_nick

    get_nick These snozzberries taste like snozzberries... VIP

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    I'm not sure what you mean by tire size. I know Bisi used to run 17x2.5 on the rear of his drag Insight.
     
  3. Tait72

    Tait72 Member

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    I mean tire height, I have 23" slicks on the front for example. Using a 15 x 4 rim on the back, just wondering if 24" or 26" is used more commonly.
     
    Last edited: Mar 12, 2015
  4. efhondakid

    efhondakid My name is Byron. VIP

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    By no means am I a pro in this aspect but wouldn't a smaller diameter tire be better? In theory it would save on unsprung weight.
     
  5. get_nick

    get_nick These snozzberries taste like snozzberries... VIP

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    No, i think you want a taller tire with a stiffer rear suspension. It will help keep the weight on the front to improve traction.
     
  6. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    you can always jack up the suspension.
     
  7. get_nick

    get_nick These snozzberries taste like snozzberries... VIP

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    If you have an adjustable suspension. This question can be basic or difficult depending on the details.
     
  8. Tait72

    Tait72 Member

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    Yep, I have adjustable suspension and it is set at its stiffest setting, and raised to the max.
    I creeped the "Sheepybuilt" sfwd drag integra and they run a 25" tall tire on the back. So I don't believe I will need a 26" tall tire.
    But hey that's why they call it test and tune. I will try em both and see if a 2 inch variance affects the 60 ft or mph on the big end.
     
  9. Briansol

    Briansol Admins Admin VIP

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    In theory, assuming a perfect inflexible circle, a circle will touch a line at exactly 1 point, but since tires are not inflexible, the contact area is flattened a bit. a larger outside diameter will touch a bit more at any given time. This will actually add to rolling resistance.

    What really matters for the flexible side is the tire pressure itself. when you reduce the pressure, you flatten the tire out alot more than adding a bit of outside diameter does.

    here's an epic paint drawing to help illustrate my point.... tires.png

    So, in theory, the least resistance tire will be the smallest one at the highest pressure.

    but then stability becomes the factor
     
    Last edited: Mar 13, 2015
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  10. Tait72

    Tait72 Member

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    I really appreciate the input and the illustration! All the info I can gather helps.
     
  11. Briansol

    Briansol Admins Admin VIP

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    So, I'd say go 24" and high psi for the least drag resistance
     
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