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Thread: Tyer question on sizes please

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    Default Tyer question on sizes please

    hello

    on my car when i bought it as 215/50/17-95w Xl tyers on it on alloy wheels .

    what other sizes can i use could i use 215 45 17 91v on them or can i use
    Goodyear Excellance 215/50/R17 91w max 168 mph

    what the diffrence in 95w and 91w .

    the cars i have is a sri ctdi 1.9 55 plate .

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    Regular Member m20_swe's Avatar
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    95w 690kg and 168mph
    91w 615kg and 168mph

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    Default

    You can use 45-section tyres and still be using the correct size, but you have to get a wider tyre to compensate - so it's 225/45 you can use, not 215/45.

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    Full Member merikiito's Avatar
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    Vehicle : Insignia CDTi SRi NAV 160

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    Default

    Quote Originally Posted by Rebellion View Post
    You can use 45-section tyres and still be using the correct size, but you have to get a wider tyre to compensate - so it's 225/45 you can use, not 215/45.
    Yep, and they are cheaper as well
    Lois Griffin: Peter! You're bribing your daughter with a car?
    Peter Griffin: Ah, c'mon, Lois, isn't 'bribe' just another word for 'love'?

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    Regular Member m8internet's Avatar
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    You can fit :
    215/50R17
    or
    225/45R17

    You could fit other 17 tyre sizes, but you will need to have the speedometer reset for that tyre group

    Now coming to the tyres themselves
    Your car doesn't actually require XL rated tyres, however they are often cheaper
    Therefore look at :
    215/50R17 in 91W, 91Y, 95W, and 95Y
    or
    225/45R17 in 91W, 91Y, 94W, and 94Y

    The 215/50R17 was chosen by VX in order to provide a more sympathetic ride
    You can swap to 225/45R17 but this is harsher, as there is slightly less vertical movement in the sidewall

    I swapped to 225/45R17 after my first set of 215/50R17, simply as a cost cutting measure
    The XL tyres, at the time were £180 each (although now they are £150 each)
    Swapping to the 225/45R17 version reduced this to £110 per tyre and has pretty much remained at this level
    However GoodYear have continued to replace their ranges in the last 5 years meaning I have had four different types (NCT5, GSD3, Assymetric, and Assymetric 2)
    Last year I got fed up of this and went back to Michelin, which I have had on all my previous larger cars

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    if i put the 225 on would the car do less to the gallon ?????????and because i got a 215 on it i would have to change both.

    thanks

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    Regular Member m8internet's Avatar
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    Quote Originally Posted by borderman932 View Post
    if i put the 225 on would the car do less to the gallon
    The difference is so negligible you will not notice as the total surface area on the road remains the same
    Just make sure you use the correct tyre pressures, they may be slightly different (on 225/45R17 they should be 1 PSI higher at the front)

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    Quote Originally Posted by borderman932 View Post
    if i put the 225 on would the car do less to the gallon ?????????and because i got a 215 on it i would have to change both.

    thanks

    You want matched sizes on each axle ... The question on fuel consumption has far too many variables dependant on quality of tyre being fitted as well

    0-Large smile ......every time it's driven

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    Default

    Quote Originally Posted by m8internet View Post
    Just make sure you use the correct tyre pressures, they may be slightly different (on 225/45R17 they should be 1 PSI higher at the front)
    Handbook says the same pressure for both sizes.

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