Do I need to buy * rated tyres?
Discussion
RockDriver said:
Technically, those are not run flats: https://www.tirerack.com/upgrade-garage/what-are-m...
"However, since they don't meet all of the International Organization for Standardization (ISO) run-flat tire operating limits under all permitted vehicle loads, they cannot be branded as run-flat tires."
This is an issue then"However, since they don't meet all of the International Organization for Standardization (ISO) run-flat tire operating limits under all permitted vehicle loads, they cannot be branded as run-flat tires."
and that not the only manufacturer that lists and make */MOE tyres.
Oilchange said:
E-bmw said:
Oilchange said:
Sounds to me like the x-drive is the weak link here, not the tyres.
I am not saying the tyres are the weak link, just that fitting the wrong ones exacerbates other issues.Questionable BMW engineering, maybe deliberately so.
When I purchased our X5M, the previous owner had fitted Pirelli P zeros all around ready for sale, the front being AR marked and rears N0 as the * rated Michelin super sports were on back order,.. Within 500miles it developed hesitation on acceleration, long story short new * rated tyres sorted it. When I compared the front and rear old tyres there was quite a difference in their height, hence causes the transfer case problems. The X5M uses a staggered tyre setup, can’t see any of the above being an issue on a square set up.
My understanding is that this only applies when the tyres are staggered - wider on the rear. Ever the sceptic, when my X5 was due for replacements, I fitted non star marked all around.
Not long afterwards, on a trip to Germany, I noticed a whine coming from around the centre of the car at 60mph, which disappeared above or below that speed.
On my return, I replaced all 4 with star marked and guess what? the whine disappeared. I'm assuming it was coming from the transfer box and obviously had something to do with the non * tyres. An expensive lesson learned.
Not long afterwards, on a trip to Germany, I noticed a whine coming from around the centre of the car at 60mph, which disappeared above or below that speed.
On my return, I replaced all 4 with star marked and guess what? the whine disappeared. I'm assuming it was coming from the transfer box and obviously had something to do with the non * tyres. An expensive lesson learned.
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