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Thread: Changing from 215 /50 to 225 / 45 PLEASE READ

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    Regular Member ossypete's Avatar
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    Default Changing from 215 /50 to 225 / 45 PLEASE READ

    ok need some tyres for the signum and after doing some searching found out some important info . The cdti signum is fitted with 215/50R17 tyres but are load rated at 95 W . ok with me so far , if you change to any other tyre size eg a 225/45/17 w yes its the correct load rating ,( W part ), BUT wrong weight rating ( 95) it has to be the same ie 95 W if its not your insurance is technically void also your putting your family at risk because the weight rating is not as high ie you cant carry as much weight . woud you lose your family in an accident for £60 extra on tyres please think about it !!!

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    Regular Member Andy's Avatar
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    is this true mate? as vauxhall offer 225/45 17 themselves as an alternative tyre size and even have a setting on the tech 2 should you go this route. Surely they wouldnt offer this if it would break the weight limits?

    ps... what wieght limits are we talking about here?

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    [Ex]Admin Duncan's Avatar
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    Andy, it's not the tyre size that is the issue that pete is raising. It's the weight rating (number before the speed rating on the tyre wall).

    I've had a look at my tyres (now 225/45/17 after changing from 215/50/17) and they are 91Y rated. I don't know what the weight rating was on my original factory tyres, but maybe they were also 91 as the 2.0T is not as heavy as the 3.2 and 3.0.

    I'm hoping that the 95 weight rating applies to models with the 3.2 and 3.0 engines - and maybe just the Signum at that as it's a heavier car than the Vectra C. Otherwise I'll be taking a trip back to my tyre fitter!

    Anyone here with a Signum 2.0T that still has the original factory fitted tyres? Can you have a look at your tyres and test my 'theory'?

    D

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    Regular Member lborob17's Avatar
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    Duncan - just been outside in the freezing garage to check my tyres!

    they are the orig factory fitted 215/50/17 on my 3.2 design signum:

    91W rating

    rich

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    Regular Member Green Growler's Avatar
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    Well I aint going outside to check mine, it's icey out there, lol.
    FYI, the ratings mean, in KG's

    90= 600kg's
    91= 615Kg's
    92= 630Kg's
    93= 650Kg's
    94= 670Kg's
    95= 690Kg's

    And if 91 is good for a 3.2 Signum, it should be good for any Vec, may be not the estate though, lol.

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    [Ex]Admin Duncan's Avatar
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    Nice one Rich - thanks.

    That's interesting that the 3.2 is 91 as well. Looking at the kerbweights the 3.0 is a good bit heavier than the 3.2......



    Maybe it's just enough to need the 95 rating then.

    Pete, are you positive about the 95 rating? Anyone else got a 3.0 that still has the original factory fit 215/45/17 tyres on that they can check?

    Or are you saying (Pete) that if you go to 225/45/17 from 215/50/17 then you then need to go up to a 95 rating?

    D

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    Regular Member lborob17's Avatar
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    Ah D I was just going to get my book outand have a look at the weights!

    so if the tyre rating is 91 for me that would mean 615kg per wheel (?) therefore my car could weigh up to 3000kg (if my maths is right!)

    so if the kerb weight is 1613 (have not checked max laden weight) it is well tyred!

    R

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    Regular Member Andy's Avatar
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    Quote Originally Posted by Duncan
    Andy, it's not the tyre size that is the issue that pete is raising. It's the weight rating (number before the speed rating on the tyre wall).


    D
    I know that Duncan, but Pete said that he had not found any 225/45 17 tyres that would offer the 95 rating. I pointed out that Vauxhall offer this tyre size themselves so how do they get round not being able to meet their own weight rating?

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    Ex Vec-C Admin & Founder Bainie's Avatar
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    Quote Originally Posted by Andy
    I know that Duncan, but Pete said that he had not found any 225/45 17 tyres that would offer the 95 rating. I pointed out that Vauxhall offer this tyre size themselves so how do they get round not being able to meet their own weight rating?

    But Rich is saying the standard VX tyres are 91 as well, This could be a real can of worms ?

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    Regular Member ossypete's Avatar
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    the signum recommended ones for the 3.0 cdti are 95 w xl , which are extrsa load tyres must be due to the car weight .iam not saying what you should have and shouldnt have , just saying to check if you change or have changed tyres to a different or even the same size.think what you need to do is check who has standard tyres on and what weight and ratings they are to compare .

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