Tire truing new Michelin XWX | FerrariChat

Tire truing new Michelin XWX

Discussion in '308/328' started by Mark C Harvey, Jun 15, 2022.

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  1. Mark C Harvey

    Mark C Harvey Formula Junior

    Jul 17, 2018
    250
    West Hartford, Connecticut
    Full Name:
    Mark C Harvey
    Last week I spent nearly $2k on a set of Michelin XWX’s for my ‘79 308. Kind of crazy money but I really love the way they look. Fitted and balanced by non-specialist local tire shop. I am fussy and immediately noticed vibration through the steering wheel at high speed (90+). Below 90 was fine. Feverishly researched online and found the below article. Called Dave who booked me the next day. He does it for love and charged me $45 a tire. It was really an eye opener to see all the tires were out of balance (computer balancing fail), AND the new tires themselves had slight variations in tread depth that made them out of round. After painstakingly shaving the rubber, Dave balanced the wheels the old fashioned way, spending about 45 min per tire.

    Result was terrific, like driving on glass. Highly recommend this service if you can find a place nearby. Apparently some truck tire places or racing shops can still do it. It is a dying art.

    FWIW I don’t often exceed 90, but I like to know the car can perform as designed, and tires are critical.

    https://www.jalopyjournal.com/forum/threads/tire-truing-shaving-in-connecticut-i-got-a-guy.1248526/
     
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  2. ginoBBi512

    ginoBBi512 F1 Rookie
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    Oct 9, 2016
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    GINO RUGGIERO
    Im not sure how your spending $ 2000.00 for 4 tires on your 308, and then having to shave the rubber off ?? Are you joking ? lol Ive been buying tires for my 328 for 23 years and 84,000 miles , as well as a multitude of other vehicles, and this is the first time I have ever heard of this, no disrespect to you, but something is seriously amiss here. A while back, I used to have a guy speed balance my tires while they were on the spindles, but not for 20 years or so. I spent half of that money for 4 Conties which are sized at 255 45 17 and 245 45 17 s 9 " and 8 " wide and much better than the ones you just payed twice as much for. These tires are just as good as the P ZEROS I have been using for 22 years, mounted and balanced with no need to shave the rubber off.

    Thank you ,
     
  3. Mark C Harvey

    Mark C Harvey Formula Junior

    Jul 17, 2018
    250
    West Hartford, Connecticut
    Full Name:
    Mark C Harvey
    Nothing amiss. The tires were $416 each plus delivery from Coker, then the cost of fitting and balancing made about $2k. That is what you pay for the original spec tires that fit 14” wheels. I really don’t care that you put 17” wheels and modern rubber on your 328, and have zero interest in discussing the benefits of modern tire technology.

    This was a big cost for me so I was really upset with the bad result. I made the post to help others that might encounter the same issues. I have attached a photo of Dave doing his magic.
    Image Unavailable, Please Login
     
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  4. GatorFL

    GatorFL Moderator
    Moderator Owner

    Nov 18, 2005
    16,865
    Wellington, FL
    Full Name:
    Duane
    You gotta love the work of a true craftsman. Not many around can do this anymore I bet.
     
  5. 4right

    4right F1 Rookie
    Rossa Subscribed

    Does this process replace the need for weights? It seems like that is what the weights are for to counterbalance both wheel and tire irregularities.
     
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  6. Mark C Harvey

    Mark C Harvey Formula Junior

    Jul 17, 2018
    250
    West Hartford, Connecticut
    Full Name:
    Mark C Harvey
    No. After the tire shave the wheel is rebalanced with new weights.
     
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  7. dinoart

    dinoart Formula Junior
    Silver Subscribed

    Oct 30, 2004
    789
    Westminster CA
    Full Name:
    David
    Gino
    Do you have to do any special alignment putting those oversized tires/wheels on your 328? Just curious. Thanks.
    David
     
  8. ginoBBi512

    ginoBBi512 F1 Rookie
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    Oct 9, 2016
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    Hey there, for 22 years I was using 17s on all four legs with 245 s in the rear and 235 s in the front @ 7.5 wide for all four rims, no need for any special alignment, just the 4 wheel alignment for the 328. I have Compomotives now, 9 " in the rear , 8 " in the front with the tire sizes that I mentioned . My 328 is an 89 , the Compos were made special for the ABS on my car . My Ferrari really has fantastic grip ! I thought Mike Tuason had a similar set up on his 308 with the Compomotives, whatever the case may be, his car looks incredible ! .

    Thank you,
     
  9. ginoBBi512

    ginoBBi512 F1 Rookie
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    Oct 9, 2016
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    Im glad it worked our for you
     
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  10. Ianjoub

    Ianjoub Formula Junior

    Dec 22, 2019
    906
    Homosassa, FL USA
    Full Name:
    Ian Joubert
    For years we had to shave tires to make them round .... the big tires for mud trucks. For the most part, tires are much better than 20-30 years ago
     
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  11. Albert-LP

    Albert-LP F1 Veteran
    Owner Rossa Subscribed

    Sep 1, 2010
    7,999
    around Modena, Italy
    Full Name:
    Alberto Mantovani
    I don't know anything about Michelin XWX and I'm very disappointed you had to cut the tread: I didn't need to do that on two Michelin TRX sets I got, who were as expensive and as old as XWX.

    This said, I do appreciate your effort to have a full factory specs car: it costs some money, but in my opinion it's worth the cost.

    Ciao
     
    Mark C Harvey likes this.
  12. todd cloud

    todd cloud Formula 3

    Jun 21, 2019
    1,044
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    Todd
    you got bad tires
     
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  13. Mark C Harvey

    Mark C Harvey Formula Junior

    Jul 17, 2018
    250
    West Hartford, Connecticut
    Full Name:
    Mark C Harvey
    I might have agreed with you and I really was close to returning them to Coker. But then found the below article about a guy shaving his newly fitted XWX on a Maserati Bora. The amount shaved is actually only 1/100 of an inch (0.25 mm), so plenty of "good tire" left afterwards ;-) I'm pretty fussy - the vibration was not noticeable below 90.

    Also, it is impossible to know the main factor causing the vibration i.e. the bad computer balancing from the initial fitting, or the XWX tread having slight imperfections (perhaps both). I'll never know and am just happy its sorted now.

    https://journal.classiccars.com/2018/04/24/the-lost-art-of-tire-truing/
     
  14. s219

    s219 Formula Junior

    Aug 26, 2021
    473
    I wonder if a modern road-force balance would have cured this. Most high end mechanics do that by default nowadays, if they can afford the machine (https://www.hunter.com/wheel-balancers/road-force-elite/). Twice, I have had tires installed at a tire shop or car dealer that had a vibration, and taking them to a local shop for a road force balance cured the problem.
     
  15. thorn

    thorn F1 Rookie
    Silver Subscribed

    Aug 7, 2012
    3,324
    Tallahassee, FL
    I wondered that as well. More than once, I've had a tire that I couldn't get to balance without a very odd weight placement; we'd pull the tire, change the position, then road-force it.

    If it wouldn't balance at that point, it was either a bent rim (seen that a lot) or a bad new tire (seen that too.)

    I know shaving is a regular thing for large trucks and racing, but passenger radials - no, I just wouldn't accept a $500 faulty new tire.
     
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  16. miketuason

    miketuason F1 World Champ
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    Feb 24, 2006
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    New or not, 14”, 390mm wheels, 16”, or 17” wheels, I always have it Road Force balance and it always work fantastic for me.
     
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  17. JCR

    JCR F1 World Champ
    Silver Subscribed

    Mar 14, 2005
    10,761
    H-Town, Tejas
    I had a thread on that.

    The lost art of tire truing aka (tire shaving) | FerrariChat
     
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  18. mcimino

    mcimino Formula 3

    Oct 5, 2007
    2,274
    Long Island, NY
    Like everything else, tire prices have dramatically risen over the past 6 months. Of all brands, Michellin tires are normally well balanced on their own.
    Curious as to the production date stamped on the side...maybe they were simply stacked for some time and a little out of shape from that. Once they're aired up and used they take shape...kind of like when your car sits unused for some time...tires flat spot and will round out once you drive for a while.
     
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  19. Mark C Harvey

    Mark C Harvey Formula Junior

    Jul 17, 2018
    250
    West Hartford, Connecticut
    Full Name:
    Mark C Harvey
    I don’t think the tires are faulty. I think they were imperfect, and I am fussy. Also possible the bad computer balance was a contributing factor. Probably both.

    Could have sent them back, but I think there was a good chance the replacement set would have been the same. Finding out would have cost me another $500 in shipping and fitting, so I thought it made more sense to get the tires shaved and rebalanced. As it happens, this much less expensive approach seems to have paid off.

    The whole exercise reminds me why I own
    a vintage Ferrari. To get away from the throw-away modern philosophy. People buy cheap crap then replace it at the first sign of trouble with more cheap crap.

    I quite like the idea of using a craftsman to shave the tire, rather than using a modern mass produced tire with all its technology and precision. I appreciate that he spin balanced by hand, rather than a use a computer. I also like the imperfect, limited production run new-old XWX tires because the car is pretty imperfect, old and rare too.
     
  20. Mark C Harvey

    Mark C Harvey Formula Junior

    Jul 17, 2018
    250
    West Hartford, Connecticut
    Full Name:
    Mark C Harvey
    Surprisingly the XWX have been this expensive for many years now. Mine are date coded December 2021 and made in Serbia. I did about 300 miles on them before the shave. Part of my reason for getting a set is I’m worried about global supply of stuff, and who knows when they will no longer be “around”.
     
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  21. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,320
    Houston, Texas
    Full Name:
    Bubba
    Out of round is out of round....and not connected at all, to balancing.

    I always watch at a safe distance as they spin my new tires up as a 40 year old cast rim can deform as well if a minor impact has occured.
     
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  22. nerofer

    nerofer F1 World Champ

    Mar 26, 2011
    12,080
    FRANCE
    These "new production" 14' XWX sell for about 300 euros apiece here in France, so 1.200 euros for the set of four.
    A full set of 16' modern Michelin for the 328 is "about 550 euros".

    Rgds
     
  23. s219

    s219 Formula Junior

    Aug 26, 2021
    473
    They can correct/compensate for that with a road force balance. Rims are usually out of round too, and the process will take both into account to find the optimum mounting. Roundness and balance are two different effects but the net result is vibration which can be corrected out (usually -- some tires/rims cannot be corrected).
     
  24. AZDoug

    AZDoug Formula 3

    Jun 17, 2009
    1,606
    Along the Verde , AZ
    Full Name:
    Doug
    #24 AZDoug, Jun 16, 2022
    Last edited: Jun 16, 2022
    They aren't Michelin tires, They are Coker tires with a Michelin name

    People who have cars they trailer around to shows buy coker repros of old name tires. That what the Coker tire is designed for, trailer queens. The reports of them being good on the road are iffy., no matter what brand car.

    Best thing I ever did was go to 17" wheels and modern V rated tires. Smooth as glass to over 140 MPH.

    PS: a set of four 17" V rated tires was just slightly more than the price as one, Coker Michelin XWX

    Doug
     
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  25. nerofer

    nerofer F1 World Champ

    Mar 26, 2011
    12,080
    FRANCE
    Honestly, and with the best intentions - not here to start a war of words, etc...I don't think that the Michelin XWX classics are manufactured by Coker.
    Disclaimer: it is true that I'm french; I'm also happy that in Michelin, France has a company leader in its field...but I'm not much of a fan of the company itself (which, occasionally, might, from time to time, acts somewhat a bit like in "The Firm", the 1993 Sydney Pollack movie, with its personnel...secrecy is paramount at Michelin...) Its products, however, are first rate.

    Difficult to know where the new XWXs are actually manufactured, but should you go to the "Michelin Classics" site, you would see that they take great pride in the quality of these new manufactured XWXs and their quality control, etc...clearly, these tyres are not second-rate nor an afterthought to them: they state that, performance wise, these are second to none. Clearly not designed as "hangar queens" socks.
    At least that's what they say.

    Perhpas Dougal, from "Longstone Tyres", who is active on this forum, would know?

    Rgds
     

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