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Tyre quiz

Discussion in 'Problems, Fixes, Tips...' started by shane, Aug 23, 2016.

  1. shane

    shane Copenworld Regular

    Joined:
    Feb 29, 2016
    Location:
    Devon
    Car(s):
    Daihatsu Copen 0.66
    I'm thinking of replacing my wheels for some new wider alloys - 6" with an offset of somewhere around 35, and maybe use some shims to make sure the tyres don't foul the steering rods inside.

    In theory I could use some 185/50 rubber, but I am anxious the new width might mean they foul the wheel arches over bumps. I could go down to 185/45 to make a bit of room, but I'm not sure how that might look...

    Anyway, the long and the short of it is this - Do you have wider wheels? What tyres do you have, and do they run with no problems?

    Cheers
     
  2. Salieri

    Salieri Copenworld Veteran

    Joined:
    Jun 19, 2012
    Location:
    Germany
    Car(s):
    Pearlescent White Copen (1.3 K3-VE)
    185/45 tyres should be OK on a 6x15 inch rim without modification
     
    shane likes this.
  3. Bemused

    Bemused Copenworld Regular

    Joined:
    Jun 25, 2016
    Location:
    Stoke-on-Trentishoe
    Car(s):
    Copen
    As Salieri says, 185/45 R15 here on 6.5 inch 38mm OS with no problems whatsoever.
     
    shane likes this.
  4. shane

    shane Copenworld Regular

    Joined:
    Feb 29, 2016
    Location:
    Devon
    Car(s):
    Daihatsu Copen 0.66
    I currently have 165/50s on standard wheels. Did you go down to 45s to make clearance, or for some other reason?
     
  5. Salieri

    Salieri Copenworld Veteran

    Joined:
    Jun 19, 2012
    Location:
    Germany
    Car(s):
    Pearlescent White Copen (1.3 K3-VE)
    The 45 or 50 is a percentage. 45% of 185mm or 50% of 165mm.
    Even at a 185/45 tyre, the rubber is a few millimeters taller than with the standard 165/50.
    So for clearance reasons, you should maybe not go for a 50 or 55 tyre
     
    shane likes this.
  6. shane

    shane Copenworld Regular

    Joined:
    Feb 29, 2016
    Location:
    Devon
    Car(s):
    Daihatsu Copen 0.66
    Ah... Now it all makes sense. Thanks for that! I'll go with 45s.
     
  7. Bemused

    Bemused Copenworld Regular

    Joined:
    Jun 25, 2016
    Location:
    Stoke-on-Trentishoe
    Car(s):
    Copen
    Yes the wider 6.5 inch rim needed a wider tyre so moved from 160 tp 185mm wide.
    But the 185 tyre at 50% profile is a larger diameter so dropping to 45 mostly balances every thing back up.
     

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