Smaller tires help w/ power?

Discussion in 'OT Driven' started by Valence, Dec 5, 2006.

  1. Valence

    Valence Gustav Refugee

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    Ok so if you put bigger tires on your truck you will lose power... so if you put smaller tires would you gain power? Thinking the stock tires and rims are a bit too big considering it's not for off roading. Was wondering If I dropped the size if I would really notice any improvement in fuel economy and available power.
     
  2. IslanderOffRoad

    IslanderOffRoad Do you even lift kit? OT Supporter

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    What size are your tires? I dont know how much difference you'd notice but changing tires is alot like changing your gear ratio, becuase a different size tire has more or less distance to travel for one revolution than does a smaller or bigger tire. Putting a smaller tire on would be like putting in a lower (numerically higher) gearset. It will help acceleration, but hurt mileage. Putting a bigger one on will be the opposite.

    I can tell how much power my 31's sucked up on the XJ. 5th gear is useless now since I have 3.07 gears. I'll be re-gearing shortly.
     
  3. P07r0457

    P07r0457 New Member

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    sorta.

    it takes less effort to spin a more narrow, or lesser-diameter wheel. However, your revs will be higher at a given speed than with your stock wheel.

    I would imagine that differences between stock and undersized wheels that don't look too goofy would be minimal.

    People that have noticable loss of power by increasing tire size usually have a lift and run tires signifigantly larger than stock... To simulate the same gain, you'd have to signifigantly reduce your diameter and width...
     
  4. affende

    affende Resident 4X4 Elitest Prick

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    top end speed will suffer, same MPH with smaller tires will cause higher engine rpms

    you will notice better acceleration and stopping.
     
  5. P07r0457

    P07r0457 New Member

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    a narrower tire may hurt stopping.
     
  6. affende

    affende Resident 4X4 Elitest Prick

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    but less rotating mass will increase braking performance.
     
  7. P07r0457

    P07r0457 New Member

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    but if you don't have the traction, then you'll either skid, or your ABS will cycle and increase stopping distance.
     
  8. affende

    affende Resident 4X4 Elitest Prick

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    wut the real question is: why would you need to stop in the first place. hit the motherfucker thats in your way.
     
  9. P07r0457

    P07r0457 New Member

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    uh, no.
     
  10. imsobored

    imsobored New Member

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    you should use four spare donut tires... you will average 100mpg and stop in much shorter distances. also the stabilty and ride with greatly be improved
     

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