Tyres

[A Blair]

Hi,
So I have this X5 sport.  Weighs iro 2 tonne. 
Front wheels 9J 255/50/19R
Rear wheels 10J 285/45/19R (think 10J?)
Need to order some winter tyres and I am a big fan of Vredestein wintracs (shogun / Rav previous fitment)

The Vredestein site is recommending 255/50/19R on each corner. I am a little concerned about a rolling radius issue and the rear. I searched the forum but the answer  was not definitive.  Can anybody help please.

Some helpful advice from my partner:
If your driving a 2 Tonne Nissan Leaf with low rolling resistance tyres in Aberdeen this year then their is great potential for it to turn into a tractor once a bend approaches.

[CondorX5]

Vredesteins are great winter tyres -used them on our elderly 4.8is for many years now. But not as a staggered setup - the BMW recommended size is 17” for the 3.0d and 18” for the bigger brake calipers of the 4.8.
Recommended 18” size is 255/55R18 all round.  Best to have a separate set of wheels and keep the 19” for summer, much better performance in winter, too.
PS read the winter tyre thread, it is old but has loads of info and does get added to every year!

[Smeeagain]

[quote="A Blair"]
Hi,
So I have this X5 sport.  Weighs iro 2 tonne. 
Front wheels 9J 255/50/19R
Rear wheels 10J 285/45/19R (think 10J?)
Need to order some winter tyres and I am a big fan of Vredestein wintracs (shogun / Rav previous fitment)

The Vredestein site is recommending 255/50/19R on each corner. I am a little concerned about a rolling radius issue and the rear. I searched the forum but the answer  was not definitive.  Can anybody help please.

[/quote]

Do you mean rolling circumference rather than radius?. Tyre circumference is quite critical on these cars to avoid winding up the diff

[kkx5]

Had Vredestein's Winter 255/285 on mine....for a week. Transfer box issues from day one.

[max]

I've got an unused set of E53 winter alloys and tyres in the BMW recommended sizes, if anybody needs some and want to make me an offer

[Alan Gunn]

[quote="max"]
I've got an unused set of E53 winter alloys and tyres in the BMW recommended sizes, if anybody needs some and want to make me an offer
[/quote]
Put an advert up with some details and a pic or 2.

[A Blair]

Hi smeeagain,
Your quite right rolling circumference. I have no idea what the % Allowance is. I did email BMW and I am just waiting for a reply. Could be wishful thinking that I get a reply. Thanks for the advice and sorry about the transfer box. I had all the transmission oils changed last week. Touch wood.
Hi Max,
The crystal ball has let us down again.

[Smeeagain]

I suspect that BMW, if they do reply, will simply tell you to use Star rated tyres all round (supposedly a tighter tolerance in manuacturing), but Ive never used them and been fine
Smee

[A Blair]

Hello Smee,
Tighter tolerance is the stench of more money.
All the premium brands have this trick. I remember 5 year ago some Porsche members posting their comments up on a certain forum about a visit to a tyre factory in Italy and asking about Porsche "N" rated tyres. They are made on the same production line. Tested for a higher tolerance (not explained how or seen) and then stamped with a much coveted  N Stamp (Bull S) for short. This I find is ridiculous and just another indirect tax for the warranty.  Buying new has its advantages but the disadvantages are multiple. All the so called premium manufacturers insist on you using "their parts" with "their stamp" on it.
To me it is just a joke.
Obviously there is a discrepancy between some parts made in a far far away east place and Europe with its quality certification.

Happy motoring fella.

[X5Sport]

Until you talk to experts like kkx5 on here who fixes broken BMW transmissions where bad tyre choice broke the car.

[Smeeagain]

[quote="A Blair"]
Hello Smee,
Tighter tolerance is the stench of more money.
All the premium brands have this trick. I remember 5 year ago some Porsche members posting their comments up on a certain forum about a visit to a tyre factory in Italy and asking about Porsche "N" rated tyres. They are made on the same production line. Tested for a higher tolerance (not explained how or seen) and then stamped with a much coveted  N Stamp (Bull S) for short. This I find is ridiculous and just another indirect tax for the warranty.  Buying new has its advantages but the disadvantages are multiple. All the so called premium manufacturers insist on you using "their parts" with "their stamp" on it.
To me it is just a joke.
Obviously there is a discrepancy between some parts made in a far far away east place and Europe with its quality certification.

Happy motoring fella.
[/quote]

Was only trying to help based, as X5 Sport says, on the damage we've seen on the forum over the last seven years Ive been here. Your originsl post says your concerned abour rolling circumference yet you now seem to be dismissing it.
Happy motoring fella

[A Blair]

Hi smee,
I was asking the question on rolling circumferance and I do not want to sound disrespectful to any member. I do not know the rolling circumference tolerance for the X5 E53. If nobody knows it here I am sure it will come out on another forum as I have not found it on here. Maybe the wrong search string? It is certainly not written in the info I have.
I do firmly believe the manufacturers of cars and tyres are in bed together. 4 tyres from the same manufacturer with the same tread depth and correct tyre size should not be a problem? The special rating from what I have learned is car manufacturers and tyre manufacturers trying various combinations. Promises of higher tolerances. But for sure their is no special tyre line making a brand specific tyre.
Please correct me with a link to the information and I will be grateful.

[Smeeagain]

I know you think the tyre thing is a con, but read this post - and it gives you the tolerance too
http://xdrivers.co.uk/forum/index.php/t ... 8.html#new

[kkx5]

[quote="A Blair"]
Hi smee,
I was asking the question on rolling circumferance and I do not want to sound disrespectful to any member. I do not know the rolling circumference tolerance for the X5 E53. If nobody knows it here I am sure it will come out on another forum as I have not found it on here. Maybe the wrong search string? It is certainly not written in the info I have.
I do firmly believe the manufacturers of cars and tyres are in bed together. 4 tyres from the same manufacturer with the same tread depth and correct tyre size should not be a problem? The special rating from what I have learned is car manufacturers and tyre manufacturers trying various combinations. Promises of higher tolerances. But for sure their is no special tyre line making a brand specific tyre.
Please correct me with a link to the information and I will be grateful.
[/quote]
A post from pistonheads formu explains it all:
Apparently the MO (Mercedes Approved) and the BMW * are to do with rolling diameter: quite a few BMW are with staggered wheels, so in order to keep the rolling diameter identical but with different tyre sizes front/rear the MO and * are meant to tweak the sizes ever so slightly to ensure minimal differences.

Even more important on the xDrive BMWs where the centre differential takes the brunt of any differences between front and rear (my X3 has 235/50/18 front and 255/45/18 rears)

For a normal RWD BMW I would be more concerned about getting some premium tyres than the * ones.

[Osprey]

[quote="CondorX5"]
Vredesteins are great winter tyres -used them on our elderly 4.8is for many years now. But not as a staggered setup - the BMW recommended size is 17” for the 3.0d and 18” for the bigger brake calipers of the 4.8.
Recommended 18” size is 255/55R18 all round.  Best to have a separate set of wheels and keep the 19” for summer, much better performance in winter, too.
PS read the winter tyre thread, it is old but has loads of info and does get added to every year!
[/quote]
I've been running our 3.0d Le Mans on 255/55 R18's and concur with the above. The car has gone now hence mine are for sale The nicest things for me about running winter wheels was putting the immaculate summer ones back on devoid of all the winter had to throw at them