355 - Current market pricing for 355 challenge speedline wheels | Page 8 | FerrariChat

355 Current market pricing for 355 challenge speedline wheels

Discussion in '348/355' started by sbenus, May 30, 2025.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. Ob917

    Ob917 Formula Junior
    Silver Subscribed

    Jun 7, 2024
    413
    Cardiff CA
    Full Name:
    OB
    Oops, what am I missing? Where are these at?
     
  2. ShineKen

    ShineKen Two Time F1 World Champ
    Silver Subscribed

    Aug 3, 2007
    20,037
    Southern California
    Full Name:
    Nostradamus
  3. ShineKen

    ShineKen Two Time F1 World Champ
    Silver Subscribed

    Aug 3, 2007
    20,037
    Southern California
    Full Name:
    Nostradamus
  4. Ob917

    Ob917 Formula Junior
    Silver Subscribed

    Jun 7, 2024
    413
    Cardiff CA
    Full Name:
    OB
    Already have these, was looking for the O.Z. Set up
     
  5. ShineKen

    ShineKen Two Time F1 World Champ
    Silver Subscribed

    Aug 3, 2007
    20,037
    Southern California
    Full Name:
    Nostradamus
    My point was there is a possibility a +77.9mm rear does exist and the fact these have an early manufacturing date, which is rare to come across… adds to the discussion. If these sizes exist, it is more likely to be from an early iteration.
     
  6. Ob917

    Ob917 Formula Junior
    Silver Subscribed

    Jun 7, 2024
    413
    Cardiff CA
    Full Name:
    OB
    #181 Ob917, Jun 9, 2025
    Last edited: Jun 9, 2025
    Ohh I got ya!
    Those weird offsets don’t seem very practical for 348/355. The rears I have are the normal @68mm , my fronts seemed off by 4mm (65) but maybe that was a mistake I made in my measurements or calculations?
    I’ve only seen that 77mm rear offset posted one time in a pretty old post. +77 would be so inboard it would look fairly ridiculous on a 348/355
     
  7. sbenus

    sbenus Formula Junior
    Silver Subscribed

    Sep 3, 2009
    480
    San Juan
    Full Name:
    Simon
    Anyone know if it’s possible to put the 355 challenge wheel studs and nuts directly onto a street car with the challenge wheels? Essentially, replacing the standard wheel bolts for the stud and nut
     
  8. JoeCab

    JoeCab Formula Junior
    Silver Subscribed

    May 27, 2014
    473
    Colorado
    Full Name:
    Joe C
    Yes, there are many options in both steel and titanium for stud conversions. You just need to properly measure the length you want (with a stud conversion extra length is not an issue except for cosmetics) and make sure you get the correct type of lug nut (these cars use cone not ball seats).
     
    sbenus likes this.
  9. ChoonHound

    ChoonHound Formula 3
    Silver Subscribed

    May 13, 2022
    2,267
    Saint Michaels, MD
    Full Name:
    Lucas
    You only need to worry about length if you want to use close ended nuts. Otherwise let your freak flag fly.
     
  10. sbenus

    sbenus Formula Junior
    Silver Subscribed

    Sep 3, 2009
    480
    San Juan
    Full Name:
    Simon
    OK so please bear with me as I’m not the most mechanically knowledgeable. If I purchase the OEM challenge wheel studs (part number 163299) and the OEM challenge close-ended wheel nuts (part number 163370) I can just bolt them right in to my street F355 GTS with the Speedline challenge wheels and fitment, clearance, etc. will be perfect?
     
  11. ChoonHound

    ChoonHound Formula 3
    Silver Subscribed

    May 13, 2022
    2,267
    Saint Michaels, MD
    Full Name:
    Lucas
    Yes. But theres no reason to pay the Ferrari tax for a widely available thing. Just buy generic. But yes.
     
  12. sbenus

    sbenus Formula Junior
    Silver Subscribed

    Sep 3, 2009
    480
    San Juan
    Full Name:
    Simon
    Got it. And thanks for the info. Generally I like keeping things as OEM as I can, even if it means paying the Ferrari tax. But I take your point. Cheers
     
  13. sbenus

    sbenus Formula Junior
    Silver Subscribed

    Sep 3, 2009
    480
    San Juan
    Full Name:
    Simon
    ShineKen likes this.
  14. tres55

    tres55 F1 Rookie
    Rossa Subscribed

    Sep 18, 2012
    3,573
    Canada
    I have a set of OEM ones that need refinishing that I'd probably part with if anyones looking.
     
    cmozz and ChoonHound like this.
  15. tres55

    tres55 F1 Rookie
    Rossa Subscribed

    Sep 18, 2012
    3,573
    Canada
    I have 3D scanned and made CAD drawings of the original speedlines and can make them nearly identical to original spec in forged magnesium making them even lighter than the originals, in any size or offset.

    Problem I'm having is, the original ones are cast...and the front wheel spokes protrude past the lip ever so slightly. We aren't able to do that with a piece of billet.

    Image Unavailable, Please Login
     
  16. tres55

    tres55 F1 Rookie
    Rossa Subscribed

    Sep 18, 2012
    3,573
    Canada
    I could "flatten" the face of the front wheels and compensate with offsets, but it won't be 1:1 identical.
     
  17. ChoonHound

    ChoonHound Formula 3
    Silver Subscribed

    May 13, 2022
    2,267
    Saint Michaels, MD
    Full Name:
    Lucas
    I suspect you could if you built them as a 2pc (with hidden hardware), no?
     
  18. tres55

    tres55 F1 Rookie
    Rossa Subscribed

    Sep 18, 2012
    3,573
    Canada
    Yes but then they'd be heavier. Goal is to recreate the original size and offset with modern materials.
     
  19. ChoonHound

    ChoonHound Formula 3
    Silver Subscribed

    May 13, 2022
    2,267
    Saint Michaels, MD
    Full Name:
    Lucas
    Folks unwilling or unable to buying real SL886s are going to need to compromise on authenticity or weight. There’s no way around that.
     
  20. bobzdar

    bobzdar F1 Veteran

    Sep 22, 2008
    6,919
    Richmond
    Full Name:
    Pete
    You're not able to make the spokes the edge of the billet piece instead of the barrel? It would seem as long as the total wheel fits within the billet piece it should be able to be machined out of it, or is the billet piece just not large enough?
     
  21. ChoonHound

    ChoonHound Formula 3
    Silver Subscribed

    May 13, 2022
    2,267
    Saint Michaels, MD
    Full Name:
    Lucas
    My understanding is in theory, yes, but practically, no; not with the blanks most folks seem to use.

     
  22. bobzdar

    bobzdar F1 Veteran

    Sep 22, 2008
    6,919
    Richmond
    Full Name:
    Pete
    It would seem that if you have blanks large enough for the rears, the fronts will also be possible (as the entirety of the front will fit inside the rear).
     
  23. ChoonHound

    ChoonHound Formula 3
    Silver Subscribed

    May 13, 2022
    2,267
    Saint Michaels, MD
    Full Name:
    Lucas
    They’re not solid tho.
     

Share This Page