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Tyre question (fitting and ride quality)

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  • 30-12-2004 8:49pm
    #1
    mike65
    Closed Accounts Posts: 88,978 ✭✭✭✭


    I replaced a blown tyre last week and the guy doing the work commented on how tight a fit the 185 width tyre was on the rim. That thought popped into my head today as my car bumped and fidgeted over the broken roads. Should I get wider tyres? Are the curent ones (all 185/65 R15) just too tight and so not allowing room for the tyre to "give". Hence jittery ride quality?

    Mike.


Comments

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    #2
    smokey2
    Registered Users Posts: 368 ✭✭smokey2


    what car do you have and what type of wheels are on it?? (alloys etc?)


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    #3
    $lash
    Closed Accounts Posts: 256 ✭✭$lash


    I would change to 195's or even 205's much better grip...


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    #4
    mike65
    Closed Accounts Posts: 88,978 ✭✭✭✭mike65


    The cars a mercedes 190e and its got Merc alloys - 7 inch wide. I did a check on a tyre site that gave tyres suitable for my car, they ranged from 185/60 to about 215/50. I dont want to go too wide with the dangers of aquaplaning and narrow roads. I have hit more cats eyes than I can count since I bought the Merc!

    Mike.


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    #5
    $lash
    Closed Accounts Posts: 256 ✭✭$lash


    Well IMO 185's are too narrow for a car the size of a 190 - I reckon 195's would be ideal


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    #6
    Farls
    Registered Users Posts: 1,785 ✭✭✭Farls


    I'd go with the 195's as well, 205's have better grip in the dry but in the winter its negotiable whats best :)

    Farlz


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    #7
    CJhaughey
    Registered Users Posts: 14,907 ✭✭✭✭CJhaughey


    $lash wrote:
    I would change to 195's or even 205's much better grip...

    This is total 8ull****
    Grip has nothing to do with tyre width.
    All that wider tyres do is change the shape of the contact patch.
    The actual contact area size will not change even if you put a 300mm wide tyre on.
    What determines the contact area is Tyre pressure and weight.
    Wider Tyres make the steering appear sharper but can as has been pointed out cause aquaplaning.
    the other thing to watch out for is Bump steer and tramlining especially with the superlow profile tyres many people fit as aftermarket accessories.
    But anyway enough diatribe, Mike question was should I fit wider tyres?
    My reply is no 185 should be good enough for a 190e , but be aware that not all tyres are the same in terms of ride quality.Michelins/Bf Goodrich are good in my exp.
    Make sure that all the tyres are the same pressure and


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    #8
    Gmodified
    Closed Accounts Posts: 973 ✭✭✭Gmodified


    i would go for quality 195 not bigger. no point to put big ones as beneffit of better grip would be minimal considering to cost


    you need to have serious pulling power to roll these big rubbers and on normal engine, big wheels will lower top speed and slightly change fuel economy which is not the best on the merc anyway:)
    autoexpress did test and e.g. golf had top speed lower by 6km/h on bigger size tyres


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