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Star Rated Tyres
- ronk
- Lifer
- Posts: 14222
- Joined: Tue Feb 24, 2009 11:50 am
- Location: Durham
Star Rated Tyres
I'm looking at fitting new rubber and don't know if its worth fitting the STAR rated/marked tyres - Is there any difference and what are the implications if I ignore the star rated product?
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
- B21
- Lifer
- Posts: 5436
- Joined: Tue Oct 05, 2021 7:15 pm
- Location: In my Banana Yellow Space Shuttle...somewhere over Southern Caledonia
Star Rated Tyres
Star rated is BMW OE approved..
For XDrive vehicles it matters a lot
For others your call...
For XDrive vehicles it matters a lot
For others your call...
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is
A very modified Atacama Yellow 35is
- ronk
- Lifer
- Posts: 14222
- Joined: Tue Feb 24, 2009 11:50 am
- Location: Durham
Star Rated Tyres
Is it just BMW's "Kings magicsuit of clothes" or is there something else?
I just can't imagine a tyre manufacturer running a BMW tyre line.
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
- B21
- Lifer
- Posts: 5436
- Joined: Tue Oct 05, 2021 7:15 pm
- Location: In my Banana Yellow Space Shuttle...somewhere over Southern Caledonia
Star Rated Tyres
* rated tyres have tighter spec on things like rolling radius..so for xdrive the standard tyres don't have a tight enough spec on this..
I found out a lot about it when I was looking at xdrive 435Ds.....
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is
A very modified Atacama Yellow 35is
- ronk
- Lifer
- Posts: 14222
- Joined: Tue Feb 24, 2009 11:50 am
- Location: Durham
Star Rated Tyres
That makes a lot of sense to me now!
Ive heard of warranty work refusal when * rated weren't fitted and it will influence my decision when new rubber is required for the 335X Drive - But for the 35is ?
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
- B21
- Lifer
- Posts: 5436
- Joined: Tue Oct 05, 2021 7:15 pm
- Location: In my Banana Yellow Space Shuttle...somewhere over Southern Caledonia
Star Rated Tyres
Largely irrelevant for the 35is as much better rubber has subsequently been released...Conti Sports Contact 7s
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is
A very modified Atacama Yellow 35is
- ronk
- Lifer
- Posts: 14222
- Joined: Tue Feb 24, 2009 11:50 am
- Location: Durham
Star Rated Tyres
Thanks P
I was looking at MPS4's - but I will certainly give the Conti a look
I was looking at MPS4's - but I will certainly give the Conti a look
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
- sars
- Lifer
- Posts: 7038
- Joined: Sun Feb 21, 2010 11:37 am
- Location: East Yorkshire
Star Rated Tyres
Star rated tyres as B21 are specifically compounded for BMW, however there is usually a list of preferred tyres in your handbook. If you have a lease car there may be a restriction on what tyre you can fit, if not then you can choose.
The issue B21 described was a thing with the original X5, that had no slip allowance between differentials, it does not apply to the modern xdrive system that can distribute torque between axles via a multi plate clutch. That’s why you can have a staggered set up, as per the 435xd, where there’s a 1.5mm difference in diameter.
I think the transfer box issue is a one that’s been hyped up by every BMW forum, reality is that any system that couldn’t take a small difference in diameter wouldn’t be in production for long as it wouldn’t stand up in court. One of the prerequisites of European standards is that obvious and foreseeable problems have to be designed into a product during development and this most certainly qualifies.
The issue B21 described was a thing with the original X5, that had no slip allowance between differentials, it does not apply to the modern xdrive system that can distribute torque between axles via a multi plate clutch. That’s why you can have a staggered set up, as per the 435xd, where there’s a 1.5mm difference in diameter.
I think the transfer box issue is a one that’s been hyped up by every BMW forum, reality is that any system that couldn’t take a small difference in diameter wouldn’t be in production for long as it wouldn’t stand up in court. One of the prerequisites of European standards is that obvious and foreseeable problems have to be designed into a product during development and this most certainly qualifies.
Gorgeous SFR Z4 M40i
Gone 2017 Iridium SL400, 2015 435d xDrive Convertible, 2012 E350 CDi Convertible, 2010 DSB Z4 sdrive30i, 2008 Audi A4 Cabriolet, 2006 Phoenix Yellow Z4 2.5Si, 2003 Saab 9-3 Convertible
Gone 2017 Iridium SL400, 2015 435d xDrive Convertible, 2012 E350 CDi Convertible, 2010 DSB Z4 sdrive30i, 2008 Audi A4 Cabriolet, 2006 Phoenix Yellow Z4 2.5Si, 2003 Saab 9-3 Convertible