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Thread: Stupid ?: Do old Fuchs need tubed tires?

  1. #1

    Stupid ?: Do old Fuchs need tubed tires?

    There is a German 1970 911 Targa restoration video that I watched recently and they put tubed Michelins on their Fuchs wheels. Just curious as I am about to buy new tires for my T.

    Ulrich

  2. #2
    Originally they did use tubes, but nobody today uses tubes. There are plenty of wheels in use today without tubes and without any problems.

    Use a TR-415 valve stem. It doesn't seem to fit very well, but it will work.

  3. #3
    Senior Member CamBiscuit's Avatar
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    As I understand it the deep sixes don't have the safety bead on the rim whereas the flat sixes do.

    That said, plenty of people do not run tubes in the early deep rims with no problems. Not sure how they would fare in a 'blowout' situation though.
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  4. #4
    Senior Member Neunelfer's Avatar
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    Older Fuchs don't have the bead (deep or not so deep). I always ran tubeless. Raced quite a bit at LVMS and autocrossed extensively as well... never a problem.
    Eric - Sandy, Utah
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  5. #5
    Hello all.

    The Insurance Company may have something to say on this...

    AFAIK its illegal in many places to run early rims without tubes now..

    Kind regards
    David

  6. #6
    I read that the MOT in England tested humpless rims with tubeless tires. Problems occurred with low inflation pressures: the tires broke free and deflated suddenly. As I recall, this was at inflation pressures of around 15 psi. So, the risk of a catastrophic failure in a slow leak situation may be high, if you run tubeless on early rims.

    This information was in an article by a British automotive engineer in the Giuliettaletta a while ago, in case any other Alfa enthusiasts on the board subscribe.
    Tom F.
    Long Beach, CA

  7. #7
    Senior Member Neunelfer's Avatar
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    Quote Originally Posted by davidppp
    The Insurance Company may have something to say on this...
    Oh $hit! NOT the INSURANCE COMPANY!!!

    Please don't tell!!!
    Eric - Sandy, Utah
    71 911
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    914-6/ORV
    87 944 Spec 1
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  8. #8
    Ulrich...
    For what it's worth...
    I ran a whole race season on early Fuchs and race rubber...not one problem...
    The only reason I switched was to go to 16 inch wheels to find a better selection of race tires
    As mentioned the TR-415 valve stems were the only ones that will fit the larger stem hole..they work just fine as well...
    Good luck...John

  9. #9
    Hello, all.

    Isit not true that Insurance Companies employ assessors to check any claims?

    And where possible to reject them..

    Any safety related discrepancy will be looked for obviously..

    Please do not ask how I know this..

    Kind regards
    David

  10. #10
    In Germany they are much strickter when it comes to these things. For instance you only may use the tire size mentioned in the vehicle registration (fahrzeugbrief). Changes need to be assessed by the TUV and once approved are written down in the vehicle registration. If you have parts on your car which are in conflict with this, it basically means that permission to use this car on the public roads is void. If this becomes apparant in case of an accident, the insurance company can/will claim the damages on the owner of the car. These things are checked in the periodic vehicle check (I think once every two years in DE).

    Back to the original question, also the tire specialists I consulted in the netherlands told me that it is not allowed to use tubeless tires on these rims. So why not just use tubes then? Problem is that there are only few tires available in tube type (I believe Vredestein and Michelin have them). Using tubeless tires with tubes is probably even more dangerous.

    I decided to buy the later 6x15 fuchs with the safety bead.
    Peter Stey
    1973 T Coupe with 2.7MFI
    1970 S Targa (sold but not forgotten)

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