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Thread: Tyre Pressures

  1. #1
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    Default Tyre Pressures

    Hi

    My first post ....so please be gentle with me

    I have a Vectra 1.8 Life (Feb 2006) with 205/55/16 Tyres

    The log book seems to show two lots of tyre Pressures



    Tyre pressure for load of up to 3 people = 29 Front & 32 Rear

    Tyre Pressure ECO loaded up to 3 people = 35 front & 38 Rear



    What is the difference or am I being thick ???

  2. #2
    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

    Default

    Car will be more responsive and have better MPG with the ECO, but will be a bit more lethargic but smoother with the first set of pressures. Welcome to the site mate.

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    Default

    If thats the case is there any point to setting the pressures in between the two points (hopefully that makes sense)

    Not tried the higher tyre pressures as wasn't sure.

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    Regular Member macdad's Avatar
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    Default

    To the site

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    Vehicle : Vauxhall Astra-J

    Trim : Elite

    Engine : 2.0 CDTi

    Year : 2013

    Default

    Surely increasing the tyre pressures will wear the centre of the tyres out quicker than the outer edges as they'll be over inflated?

  6. #6
    Regular Member Grem's Avatar
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    Default

    Hi Mate

    I have experimented with the tyre pressures ref your comments and my findings are:-

    When I increased pressures to the ECO settings (higher PSI) I noticed the following.

    1. Increase in MPG - aprox 4mpg on the computer.

    2. Slightly smoother on the motorway miles and eco driving on A road.

    Downside.

    Slightly less gripp as typres are really blown up to max.

    I do the following - Eco settings in summer months and normal in winter, and a bit of in between in spring and autum.
    Hope this helps.


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    Vehicle : Vectra

    Trim : LS

    Engine : 2.0 DTI

    Year : 2003

    Mileage : 150000

    Default

    I was told by VX mechanic, best to keep it at 34 all round.

  8. #8
    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

    Default

    Quote Originally Posted by Big Dave View Post
    Surely increasing the tyre pressures will wear the centre of the tyres out quicker than the outer edges as they'll be over inflated?
    My tyres have a MAX inflation of about 50 psi marked on the side, so running 38 is well within there tolerances. Also there are metal bands running around the tyre so its not going to balloon.

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    Vehicle : Vauxhall Astra-J

    Trim : Elite

    Engine : 2.0 CDTi

    Year : 2013

    Default

    I'm not talking about the max pressure limits the tyres can handle.

    What I'm referring to is that an under-inflated tyre will cause the tyre to wear on the outer edges of the tread, leaving the central tread area far less worn.

    Whereas an over-inflated tyre will cause the centre of the tyre to wear out far quicker than the outer edges.

  10. #10
    Regular Member wingers1982's Avatar
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    Default

    im a tyre center manager and in our books we get it says 34 psi all around

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