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High Profile Tyres

Discussion in 'Bodywork, Tyres, Wheels & Trim' started by DougMb, Feb 17, 2020.

  1. DougMb

    DougMb Active Senior Members

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    Your Mercedes:
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    What are the highest profile tyres that you can put on a 19inch wheel.
    They are on a 2006 Cls 320 Diesel.
     
  2. Wighty

    Wighty Senior Member

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    If the wheels are on the car , then for that size wheel , they already have the correct tyre size ? To get a larger tyre profile you have to go for a smaller wheel so that the overall size remains the same
     
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  3. Rotorhead500

    Rotorhead500 Senior Member

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    To give you some idea, my CLS 320 was on 17" OEM alloys, tyres were 245/45.

    As above, if you just increase profile, you'll increase rolling radius with all the associated implications. (Unless you bring tyre width down to winter rally stage proportions).
     
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  4. JBell

    JBell Senior Member

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    Your Mercedes:
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    Standard is

    Front: 255/35R19
    Rear: 285/30R19

    Going higher will not do the drivetrain any good
     
    Last edited: Feb 18, 2020
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  5. LostKiwi

    LostKiwi Senior Member

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    Technically correct though Malcolm fitted his SL with +5 profile and they work fine.
    Speedo is deadly accurate now so need to be very careful....
     
  6. Wighty

    Wighty Senior Member

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    That’s scary an accurate speedo :eek: . I prefer a little grey area ;)
     
  7. rifiki

    rifiki Senior Member

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    All speedos run around 2-3% fast with original size wheels.
     
  8. EmilysDad

    EmilysDad Senior Member

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  9. Wighty

    Wighty Senior Member

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    Does that affect the insurance with non standard tyre sizes ?
     
  10. RhodieBill

    RhodieBill Senior Member

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    Your Mercedes:
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    If you wanted a higher profile the best way to go is to fit 17" Wheels with:

    255/45x17 Front
    275/40x17 Rear

    This will give the the exact same overall diameter as the standard 19's and will increase the Sidewall from 3.4 inches to 4.3 inches on both front and rear.
     
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  11. 400ixl

    400ixl Senior Member

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    If they are not approved sizes for the model then you "should" inform the insurer of the modification from manufacturer standard. If you fit another approved size then you shouldn't need to inform them.

    Its something they usually just note, some do decide to charge the admin fee, rarely do they change the policy price if the wheels stay the same. Often best to do it a policy change time.

    Saying that, if it is for comfort, that amount of change will not make a huge difference. Better to get a smaller OEM wheel with a tyre with a larger sidewall. Size will depend on the wheel inner profile clearing the break calipers etc so do proceed with caution.
     
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  12. LostKiwi

    LostKiwi Senior Member

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    Yes but they're non standard wheels anyway
     
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  13. oigle

    oigle Senior Member

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    Yes - to emphasise this
    Size will depend on the wheel inner profile clearing the brake calipers etc so do proceed with caution.

    Ian.
     

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