Tyres on Jaguar approved car

[andyman_2006]

Sheepshanks said:

andyman_2006 said:

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Its not really different. It does however indicate the manufacturer has tested and approved it for use on their model of cars, this no doubt more specifically is relevant to a performance car like XKRS/F-Type R etc but they might apply to the whole range...Porsche do.

It works for Porsche but they have multiple versions of their N marked tyres.

For other marques, it's just marketing bks. I've got a 2004 Mercedes - if I buy an MO marked tyre today do you think Mercedes and the tyre manufacturer have optimised that tyre for my car? Mercedes offers 17 different models in the UK at the moment - it's simply not possible that the same brand and version of MO tyre could have been optimised for every model, and every suspension set-up.

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I agree, but if like the op has done, the car has been bought from a Authorised dealer, and on a car with 550hp, my money (£50K + in this case) would be asking the selling dealer for the correct J rated factory issue tyres, matched on the whole car. Otherwise it makes you wonder what other corners were cut during its prep.

To be honest having just bought a Porsche. JCT Sheffield were very good, and the car was faultless, and for the topic in hand N rated Pirelli P Zero's fitted and car drives perfect. If the car had miss matched tyres i wouldn't have collected it, or paid the balance owing but the way JCT Porsche operate they would simply have put it right if it were wrong and a customer was not totally happy.

I'm not stupid to think cars are all individually setup for each single model/type and then rated for each model and setup but i do think a manufacturer works with a tyre maker and at point of launch of a car or car range develops a tyre to work well on those models and offers them from the factory, once the first set are worn its up to the owner what they fit, will it upset the handling? who knows until you change them.

That said BMW worked with continental to develop the sport contact M3 so this was developed for a single M3 model in a 3 series range, and the same with the CSL having pilot supersports. I'm sure its more relevant to higher end performance models than cooking diesels etc.

I know the Toyo Proxes T1S marked AO for Audi made no difference as the tyre 255/35/19Y was exactly the same spec marked AO or not and i fitted the non AO of the same tyre it was totally fine. But would i have mixed tyre makes/tread patterns on the same axle? No.

The OP is right to challenge this dealer IMO

Andy

[toffee]

Update on this.

The dealer has now agreed that the car should have matching tyres.

Thank you for all your thoughts and comments, never realised that tyres were such a minefield!

- Julia

[andyman_2006]

toffee said:

Update on this.

The dealer has now agreed that the car should have matching tyres.

Thank you for all your thoughts and comments, never realised that tyres were such a minefield!

- Julia

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Good result, and good on them for putting this right.

If you dont ask you dont get.

Andy

[craigjm]

toffee said:

Update on this.

The dealer has now agreed that the car should have matching tyres.

Thank you for all your thoughts and comments, never realised that tyres were such a minefield!

- Julia

Good stuff. Check the tread on the tyre on the opposite side of the axle to the non-matched one and if that is below 6mm insist that it is changed also so that its even across the axle. You don't want one new tyre and one quite worn tyre on the same axle.