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  1. 21st May 2008, 16:20 #1
    br21
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    tubes in tubeless tires?

    hi!
    is it allowed to put tubes in tubeless tires - for example michelin L's o ZL/ZR's? i can't find in any regulations is it allowed or not? maybe somebody knows?
    thanx in advice
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  2. 6th June 2008, 02:45 #2
    Guest
    no not at all, the title looks little hard and kidding
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  3. 25th July 2008, 02:01 #3
    rallying443
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    thats a good question i would like to know that 2
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  4. 25th July 2008, 07:08 #4
    jonkka
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    Why would you want to do that?

    FIA WRC regulations says that:

    18.8 Devices for maintaining full tyre performance
    The use of any device for maintaining the full performance of the tyre with an internal pressure equal to or less than atmospheric pressure is forbidden. The interior of the tyre (the space between the rim and the internal part of the tyre) must be filled only with air.
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  5. 25th July 2008, 19:44 #5
    bowler
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    fitting a tube would reduce the performance of the tyre, by adding weight, and increasing temperature.
    I cannot see any valid reason to do so for serious competition, nor for road use.

    If you need the tube for strength, then you have the wrong tyre
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  6. 25th July 2008, 20:40 #6
    FAL
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    Back in the day, particularly with Minis etc, it was quite normal to fit tubes. It allowed reasonably low tyre pressures for grip/traction without the risk of the tyre rolling off the bead/rim and deflating when sideways.
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  7. 26th July 2008, 00:59 #7
    sollitt
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    If I remember correctly, there were actually tubes specifically made & sold for use with rally tyres ... until quite recently.
    Never do anything you wouldn't want to explain to a paramedic.
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  8. 26th July 2008, 01:29 #8
    Rally Hokkaido
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    Most competitors in Japan still insist on running tubes in their rally tyres.
    And yes, these are rally tyre tubes, so marked and fitted with metal valve cases.
    "Racing is life. Anything before or after is just waiting." Steve McQueen
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  9. 26th July 2008, 02:04 #9
    SubaruNorway
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    Don't they use tubes on autocross/banger cars?
    "Die with memories, not with dreams" Scott McIsaac
    http://www.motorsportfilmer.net
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