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Tyre question for W210 E320 (petrol)

  • 01-11-2009 10:19am
    #1
    PoleStar
    Closed Accounts Posts: 774 ✭✭✭


    Just a quick question.

    Was going to a couple of places to get tyre quotes.

    Tyres currently on the car are 205/55/16 and got a few quotes.

    However when I pitched into Fast Fit, the guy said I have the wrong tyres and it should be 215 rather than 205 (which works out a good bit dearer).

    Is there much of a difference between the 2 as frankly if the 205 are ok then I would rather save the money, and afterall, have had these "wrong" tyres on the car for the last couple years since I got the car (from a mercedes garage too!).

    Thanks!


Comments

  • #2
    mike65
    Closed Accounts Posts: 88,972 ✭✭✭✭mike65


    That profile is perfectly fine. The factory spec is 215/55. So while the Fast Fit guy was technically right you are safe enough.


  • #3
    PoleStar
    Closed Accounts Posts: 774 ✭✭✭PoleStar


    What is the actual difference though.

    I see that say for example the E200 now should have 205 tyres. IS it because bigger engine ie faster acceleration that it recommends the wider tyres?

    For every day driving assuming I aint a boy racer, will there be no difference?

    Also, breaking in an emergency, will it be the same safety?


  • #4
    mickdw
    Registered Users, Registered Users 2 Posts: 23,688 ✭✭✭✭mickdw


    It would cause a small difference in rolling radius but not enough to worry about speedo reading wrong.
    I would check to make sure that the tyre safe loading & speed rating are at least equal to that of the specified tyre.

    Edit:

    Try camskill.co.uk for the 215 tyres and add about €60 max for fitting all 4. See if it beats fast fit!


  • #5
    Esel
    Registered Users, Registered Users 2 Posts: 23,093 ✭✭✭✭Esel
    Not Your Ornery Onager


    mickdw wrote: »
    It would cause a small difference in rolling radius but not enough to worry about speedo reading wrong.
    Oops! No difference to rolling radius if the profile (55) is the same.....

    Not your ornery onager



  • #6
    mickdw
    Registered Users, Registered Users 2 Posts: 23,688 ✭✭✭✭mickdw


    esel wrote: »
    Oops! No difference to rolling radius if the profile (55) is the same.....

    Ooooops yourself! Have another look. 55 profile means 55% of the tyre width.
    Apologies accepted gracefully (sometimes):D


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  • #7
    Esel
    Registered Users, Registered Users 2 Posts: 23,093 ✭✭✭✭Esel
    Not Your Ornery Onager


    Oops! What was I thinking? :o:D

    Not your ornery onager



  • #8
    sundodger5
    Registered Users, Registered Users 2 Posts: 1,191 ✭✭✭sundodger5


    the smaller tyres will also have a lower load rating. i.e they are disigned to carry a lower weight.
    could have insurance implications (modified?)
    i would put on the correct tyres.The guys in merc when designing the car did not pull the recommended spec from the air.


  • #9
    conical
    Registered Users, Registered Users 2 Posts: 378 ✭✭conical


    Good tyre size calculator here
    http://www.etyres.co.uk/tyre-size-calculator.htm


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