Clamp-in vs. snap in tire valves | FerrariChat
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Clamp-in vs. snap in tire valves

Discussion in '456/550/575' started by jznd, Feb 17, 2014.

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  1. jznd

    jznd Formula Junior

    Oct 26, 2008
    373
    Hong Kong
    #1 jznd, Feb 17, 2014
    Finally put the 345 width Michelin Super Sports on my Hamann 19 x 13 rear wheels this weekend and it was no issue at all fitting the 345s rather than the original 355 PZeros as recommended by Hamann but which are no longer made.

    The 345s don't look at all "stretched" and I doubt I'll ever drive hard enough on the street to notice any appreciable difference in handling characteristics. But I'm certain I'll no longer be spinning the rears even under modest acceleration now that the rock hard, 8 year old Pzeros are off the wheel. Thanks to everyone who helped me make that decision on tire sizes!

    Turns out however that the Hamann rims use the smaller valve hole (0.453" vs the typical 0.625") for which the tire shop didn't have the correct valve stem in stock. The tire shop fitted a temporary solution (a clamp-in one that is a bit too short - ok for getting it home but I'm not driving hard with it!).

    Easy fix - just order the 0.453" valve, but which one? A Clamp-in or Snap-in? Does it matter? I didn't even realize there were two sizes of valve apertures.
     
  2. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,545
    socal
    #2 fatbillybob, Feb 17, 2014
    Using short 045 is fine. Clamp ins are metal. Metal is good because stronger. I use them for racing because nothing sucks more than losing valve stem. Some snap in have metal cores. You will find those on higher PSI applications like 3/4 ton pickup trucks. Most snap in are cheap all rubber. They all work.
     
  3. jznd

    jznd Formula Junior

    Oct 26, 2008
    373
    Hong Kong
    #3 jznd, Feb 17, 2014
    Thanks billybob.
     
  4. Andrew D.

    Andrew D. F1 Rookie

    Jul 6, 2008
    3,979
    Goodwood Ontario
    Full Name:
    Andrew D.
    #4 Andrew D., Feb 18, 2014
    I have hammans with 13" wide wheels on the back. It transformed my handling. Hope you find the same. Cant wait to hear the sound with the resonator deletes and tubi exhausts in the spring. We still have several feet of snow on the ground.
     
  5. jznd

    jznd Formula Junior

    Oct 26, 2008
    373
    Hong Kong
    #5 jznd, Feb 19, 2014
    Let us know what you think. I had straight pipes (resonator delete) with gen 1 Tubis for a few weeks and found it fantastic, but swapped to a xpipe because it was just too obnoxiously loud. Was starting to get some really nasty looks from my neighbors living in the ground floor apartments. The gen 2 Tubis are supposed to be much better with the straight pipes.

    The new Michelins have really improved the ride and handling. Compliant (sort of) over bumps in the road, and no more spinning in 3rd gear on my commute home.
     
  6. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,007
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #6 tazandjan, Feb 19, 2014
    Last edited by a moderator: Sep 7, 2017
    The holes for the valves can always be reamed to the larger size so Huf-Beru OEM style valves will fit.

    Those Hamann PGIIIs are good looking wheels. 9x19 and 13x19 on this Maranello. No longer in production, last I heard.
    Image Unavailable, Please Login
     
  7. jznd

    jznd Formula Junior

    Oct 26, 2008
    373
    Hong Kong
    #7 jznd, Feb 20, 2014
    Last edited by a moderator: Sep 7, 2017
  8. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,007
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #8 tazandjan, Feb 20, 2014
    Looks great and Giallo is my favorite Ferrari color. It should look like a muscle car with 13.6" wide rear tires. The ones on my NF2s are 14" wide (355/25) and the Mustangs usually leave me alone.
     
  9. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,849
    MO
    Full Name:
    Omar
    #9 Auraraptor, Oct 30, 2023
    Bumping ancient thread. What are people running Hamann using now a days?

    I realized I need to order valve stems and Hamann is NLA; personally would rather not use the rubber snap-ins.
     
  10. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,545
    socal
    #10 fatbillybob, Oct 31, 2023
    Use any metal clamp in valve likely 0.453" there are only 2 popular sizes. Come metal and chrome metal and different lengths for cosmetics and access in different rims
     
  11. DZ-96

    DZ-96 Formula 3
    Silver Subscribed

    Mar 7, 2010
    1,889
    South Germany
    Full Name:
    Daniel
    #11 DZ-96, Nov 1, 2023
    In the past, my friend (a tire dealer) said, that it's not allowed to mount snap in valves (mostly rubber) on a fast car, max speed more than XXX Km/h (i don't remeber the speed). There you have to use screwed valves.

    Since about 10 years, i have a set Hammans 2 piece 19" too.
    At the rear the wider 13".
    But i have never mounted them.

    Seems that i'm a wheel junky.
    ;)

    For the 550 i have to the mounted original rims
    1 set original BBS rims brand new
    1 set Hamman 19 inch in good condition

    For the 599
    1 set original GTO wheels

    For the 812
    the original twisted 812 wheels
    3 sets of original Monza SP Wheels, 1 on the car, the other 2 brand new

    Daniel
     
  12. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,545
    socal
    #12 fatbillybob, Nov 1, 2023
    not true on all rubber v rubber metal v screw in or clamp in stems. all have plus and minus.
     

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