Speed limit of Slicks

Discussion in 'PSI Superchargers Tech Questions' started by Big Russ, Feb 28, 2006.

  1. Big Russ

    Big Russ Member

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    I been running some 33x16.5x15 Mickey Thompson slicks for a while now with rim screws (tubeless) I've had no problems but I'm starting to run some decent speeds. 205 last time out. How fast can you run these slicks before I need to get beadlocks ??? (I cannot buy a liner for a 15inch dia. rim)

    I hear that the NHRA mandated the Pro stock cars go to beadlocks because they were going over 200. Should I be worried??

    Cheers
    Big Russ
     
    #1
    Big Russ, Feb 28, 2006
  2. Mike Canter

    Mike Canter Top Dragster
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    Russ, I do not believe the beadlocks where mandated because of top speed. They were mandated on ProStocks to give better control in recovery if the car got crossed up. Without beadlocks a car that has gotten crossed up will tend to roll more sideways on the tires making it easier to lose control. I agree that there is probably some side benefit on speed also
     
    #2
    Mike Canter, Feb 28, 2006
  3. NervesofSteel

    NervesofSteel new

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    Hi Russ,
    The beadlock design came about for a number of reasons. The main reason would be to provide a positive lock on the bead to prevent the slick rotating on the wheel. The side benefit is reduced wheel weight (unsprung weight) therefore less HP loss to turn it vs. a wheel, tube and liner, around 30 lbs a wheel difference I think. Also as Mike Canter mentioned, a stability factor, but also staying in the light of safety, to eliminate the need for tube and liner which if the tube fails due to a tear / puncture (and it does happen), you now have a slick with 45psi of air in it and 4-6 psi in the other, not a good situation!

    Mike Etter
    Nerves of Steel AFC
     
    #3
    NervesofSteel, Feb 28, 2006
  4. Kurt - Prostart Race Cars

    Kurt - Prostart Race Cars Member

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    Tire Speed

    Russ, be carefull Bob Book lost a car due to tire-wheel separation. A/D, 211 M.P.H. I don't remember if they were screwed or not, but he has switched to beadlocks since then. Good luck!
    Kurt-Prostart Race Cars
    Race to win!
     
    #4
    Kurt - Prostart Race Cars, Mar 2, 2006
  5. BLOWN INCOME

    BLOWN INCOME tafc

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    Can Remember Ripping The Tires Off Screwed Rims On Our Pro Outlaw Car At Norwalk (when It Was A Class In Ihra ),when We Were Doing A Burn-out. Since Then We Have Gone To Bead Loc Rims.
     
    #5
    BLOWN INCOME, Mar 2, 2006

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