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tyres

Discuss your latest mods or ideas, and anything to do with the BMW X5 (E70).
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russ25
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tyres

Post by russ25 » Wed Sep 02, 2015 7:44 pm

have any one tried or heard of what general grabbers AT tyres fitted to 20" what are they like? thinking of getting them for winter etc.

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chris.t
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Re: tyres

Post by chris.t » Wed Sep 02, 2015 8:32 pm

Never heard of them
Present 2016 Audi S8
Previous 2014 BMW 640d msport
Previous 2012 BMW X5 30d msport

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X5Sport
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Re: tyres

Post by X5Sport » Wed Sep 02, 2015 10:11 pm

Watch the rolling diameters on the 'coarser' tread patterned tyres.  Get it wrong and night night diff!  It's happened to a few on here now.

There's a long thread on winter tyre choices.  Well worth a browse  :)
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Nick73
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Re: tyres

Post by Nick73 » Fri Sep 04, 2015 4:55 pm

If it helps I've got General Grabber AT on an older shogun running on 16's and on the wife Discovery2 on 18's.  On those 2 cars I rate them a lot, been very good while towing and during the snow and bad weather up here in Scotland over the last year. 

They do have deep tread though, come with ~11mm rather than the usual 8mm.  Not sure about them on an X though.  I 'thought' the diff probs happened with big differences between front and rear tread (so front and rear have different rolling diameters) but I could very easily be wrong ! 

Be interesting to see how an X looks on a set though.

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Re: tyres

Post by X5Sport » Fri Sep 04, 2015 5:33 pm

It usually is the front rear difference that causes the upset, but with deeper treads it might do the same depending upon the manufactured tolerance on the tyre diameter.

Allegedly the '*' marking on tyres indicates the correct diameters for BMW - according to my local Dealer anyway.  Exactly how big the real world difference actually is against non'*' tyres no one has ever said.
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kkx5
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Re: tyres

Post by kkx5 » Fri Sep 04, 2015 9:03 pm

The probem is with staggered set up (255/285; 275/315). Its not only about rolling. "*" marked tyres have different drag front to back vs non "*" marked, to compensate  different sizes. On "normal" set up (255/255;285/285) it does not really matter what tyres you put as long as they are same make and same tread depth. General grabber on x5? sorry, for me its a big no no. They look awful.

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Re: tyres

Post by sid10 » Sat Sep 05, 2015 5:06 pm

Premium car with tyres off a tractor ?

russ25
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Re: tyres

Post by russ25 » Tue Sep 08, 2015 7:30 pm

thanks for help. just need a good winter tyre

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Re: tyres

Post by X5Sport » Tue Sep 08, 2015 9:57 pm

There's a massive thread on winter tyres on the forum.  Might be summat of use in there?
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