Tyres on Jaguar approved car

Tyres on Jaguar approved car

Author
Discussion

toffee

Original Poster:

135 posts

217 months

Thursday 22nd September 2016
quotequote all
Hi, just looking for some thoughts.

I recently bought an XKRS from a Jaguar dealer, as a Jaguar 'approved' used vehicle.
On delivery I noticed that it has 3 Pirelli p zeros and one Vredestein tyres. The non matching tyres on on the front, so guess that is better than the back!

I didn't notice the tyres didn't match on the test drive.

Just getting some thoughts on whether I should make a fuss about this/ how much of a fuss.

The more I think about it, the more annoyed I am getting!

- Julia

andyman_2006

718 posts

189 months

Thursday 22nd September 2016
quotequote all
toffee said:
Hi, just looking for some thoughts.

I recently bought an XKRS from a Jaguar dealer, as a Jaguar 'approved' used vehicle.
On delivery I noticed that it has 3 Pirelli p zeros and one Vredestein tyres. The non matching tyres on on the front, so guess that is better than the back!

I didn't notice the tyres didn't match on the test drive.

Just getting some thoughts on whether I should make a fuss about this/ how much of a fuss.

The more I think about it, the more annoyed I am getting!

- Julia


Take it back, and point out the issue, the car should be fitted with Jaguar Rated tyres (not sure exactly what brand but my friend has Dunlop sport Maxx J rated on his) the J rating is the important bit, but i'll bet the Vredestein are not J rated the Pirelli might be, its the same with Porsche approved used are supplied with N rated Pirelli, a matching set.

If its a used approved you should have the correct rated tyres fitted, and a full set not a mix mash, or this is what i would expect.

Make as much fuss as possible, they should look to resolve this, if not i would email Jaguar UK for advice.

Good luck

Andy

jamieduff1981

8,022 posts

139 months

Thursday 22nd September 2016
quotequote all
I got a Jag approved car (much cheaper) a good number of years ago with Maxxis tyres on the back. I think they just chance it.

I'd go back with it and point out that having gone to the effort and expense to source an R-S, mismatched tyres aren't really a part of what you want from the car and you expected better from a Jaguar approved flagship model. Add in that them wasting most of the money the correct tyre would have cost putting the wrong tyre on is making you cringe and that you hope they haven't bodged anything else. Lay it on thick smile

Simpo Two

85,148 posts

264 months

Thursday 22nd September 2016
quotequote all
I bought a used Jaguar last month (from a non-Jaguar dealer) and found that the front tyres, which they had replaced, were 'Hi-Fly' - for which the invoice revealed that they paid £49 each!

How exactly is a tyre with a 'J' on it different from a normal one?

Stedman

7,213 posts

191 months

Thursday 22nd September 2016
quotequote all
Would want (decent) matching on the axles at the very least.

andyman_2006

718 posts

189 months

Thursday 22nd September 2016
quotequote all
Simpo Two said:
I bought a used Jaguar last month (from a non-Jaguar dealer) and found that the front tyres, which they had replaced, were 'Hi-Fly' - for which the invoice revealed that they paid £49 each!

How exactly is a tyre with a 'J' on it different from a normal one?


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.

Had the same issue with our Audi TT (AO rated) but when it comes down to warranty claim (and this is def correct for Porsche) they insist on having correct AO or N rated tyres. My friend who runs an XKR says Jaguar are exactly the same with warranty and J rated ones, and insist you use the 'correct' tyres. A con? no doubt as they certainly cost more and carry same spec.

Once our Audi TT was out of warranty i fitted same model TOYO T1R tyres with no 'AO' marking, they were perfect.

All i was saying is on a car like XKRS and from a main dealer as 'used approved' it 'should' be fitted with J rated tyres, if it were my £50-60K i'd most certainly insist it was.

Andy


Edited by andyman_2006 on Thursday 22 September 16:07

toffee

Original Poster:

135 posts

217 months

Thursday 22nd September 2016
quotequote all
Thanks for the replies. Am on the case......

8bit

4,846 posts

154 months

Friday 23rd September 2016
quotequote all
If I was you I'd be asking for another three Vredesteins, not one more Pirelli.

a8hex

5,829 posts

222 months

Friday 23rd September 2016
quotequote all
Not so much on an XKR but on my X300 the tyres have 2 different recommended tyre pressure settings. 27PSi for comfort and 30PSi for economy. This is further out than the normal recommended range of pressures for tyres, so the J rated ones were tested and approved by the tyre manufacture to support a wider range of pressures that they normally supported.

mr.man

511 posts

215 months

Friday 23rd September 2016
quotequote all
The J on a tyre is nothing to do with the speed rating. It's purely to show that Jaguar approve of this tyre.
The speed rating can be found as the last letter on the tyre wall and in the case of an XKRS it should be Y
which is good for 186 mph.

anonymous-user

53 months

Friday 23rd September 2016
quotequote all
a8hex said:
Not so much on an XKR but on my X300 the tyres have 2 different recommended tyre pressure settings. 27PSi for comfort and 30PSi for economy. This is further out than the normal recommended range of pressures for tyres, so the J rated ones were tested and approved by the tyre manufacture to support a wider range of pressures that they normally supported.

Not true. Plenty of cars, and tyres, have wider variations of pressure than a mere 3psi, to allow for different loads and even wear.

The manufacturer ratings are of no value, except to the manufacturer, who can get a higher price for them from the gullible and avoid warranty claims should they wish to. Porsche are awful in this respect though the performance difference between different brands of their approved tyres is such that some of them would never be approved by a genuine system.

a8hex

5,829 posts

222 months

Friday 23rd September 2016
quotequote all
REALIST123 said:
except to the manufacturer, who can get a higher price for them from the gullible
Since they weren't any more expensive I was more than happy to take advice from the tyre fitter, I was told the non J version wouldn't wear evenly at the comfort pressure. Who was I to argue when it wasn't costing me anything.

anonymous-user

53 months

Friday 23rd September 2016
quotequote all
a8hex said:
REALIST123 said:
except to the manufacturer, who can get a higher price for them from the gullible
Since they weren't any more expensive I was more than happy to take advice from the tyre fitter, I was told the non J version wouldn't wear evenly at the comfort pressure. Who was I to argue when it wasn't costing me anything.

By all means take advice from a tyre fitter if you don't know better. I spent 25 years in the tyre industry, at a level somewhat higher.

One thing. There is no such thing as comfort pressure. The correct pressure when warm will see even wear. Lower will see more edge wear, higher more centre wear. 3psi is neither here nor there in terms of ride comfort or wear. It's less of a change than you'll see as the tyre warms up in running. In fact, you could get a 3psi variation as you drive depending on how you drive.

Some Vauxhall cars give different pressures between 'comfort' and 'Eco' of 9psi btw. Still think 3 psi is significant?

Would have thought that we all know these days what manufacturers will say to satisfy the 'Eco' warriors. I didn't think anyone took it seriously.


Simpo Two

85,148 posts

264 months

Friday 23rd September 2016
quotequote all
REALIST123 said:
By all means take advice from a tyre fitter if you don't know better. I spent 25 years in the tyre industry, at a level somewhat higher.
A question. I was talking to a tuning company who advised that when it comes to ride comfort it doesn't matter whether you have 17, 18 or 19" wheels - they said that lower profile tyres have more flexible sidewalls to compensate so it all evens out. Sounded like balls to me - who's right?

a8hex

5,829 posts

222 months

Saturday 24th September 2016
quotequote all
REALIST123 said:
I spent 25 years in the tyre industry, at a level somewhat higher.

One thing. There is no such thing as comfort pressure. ...
You might well have been a hot shot in the tyre industry for 20 years but I've spent those 20 years driving my X300, believe me the tyre pressure makes a different to the ride quality. Of course they'll vary as you drive but starting off with the correct comfort settings at ambient temperature is more comfortable.


craigjm

17,909 posts

199 months

Saturday 24th September 2016
quotequote all
By all means you can ask but there is nothing in the approved used standards about the car having to have matching tyres. All that matters for the programme is that they are of roadworthy standard. The standards for approved used and new are not the same

ITP

1,996 posts

196 months

Saturday 24th September 2016
quotequote all
No way i would accept that. You will most likely find that in the cars handbook it says tyres are not to be mismatched across the same axle, maybe even all 4. Are they going to argue against that?
I wouldn't have different tyres like this on any car, never mind one with 550bhp!

JPXKR

16 posts

199 months

Monday 26th September 2016
quotequote all
REALIST123 said:
The manufacturer ratings are of no value, except to the manufacturer, who can get a higher price for them from the gullible and avoid warranty claims should they wish to. Porsche are awful in this respect though the performance difference between different brands of their approved tyres is such that some of them would never be approved by a genuine system.
Some years ago I fitted - at the customer's insistance - a set of Dunlop tyres to his Porsche 911 (964 model). They were the correct size, speed and load rating, but were not "Porsche approved" - i.e. they didn't carry the 'N' rating of the manufacturer approved tyres. He was soon back complaining that, at 60 mph, the car was "undriveable" - weaving all over the road as if it was "towing a caravan in a high wind". We checked pressures, geometry etc. etc. but couldn't cure the problem. Eventually, we ftted a set of 'N' rated Pirellis and, hey presto, problem solved.
Now I'm not saying that this is the case with all "manufacturer specific" tyres (I very much doubt that the Mercedes, Audi or Jag fitments are any different from standard), but in my experience (i.e. 40+ years in the retail tyre trade) it is sometimes essential to fit the approved tyres.

jamieduff1981

8,022 posts

139 months

Monday 26th September 2016
quotequote all
The P-Zeros for my XFR-S cost the same with or without the J-rating. I happen to have 4 Michelin Pilot Super Sports now, but that's besides the point.

Mismatched tyres with different characteristics under acceleration, braking and cornering are not the best way to enjoy a chassis that has been specifically set up for performance and driver enjoyment.

Sheepshanks

32,530 posts

118 months

Monday 26th September 2016
quotequote all
andyman_2006 said:


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.