[Herr Gross Byte]

Originally Posted by bmnut

It is interesting to hear your views on the Turanzas Herr Gross Byte. I had a G32 M440i for about fifteen months (don't ask!) running on Turanzas and didn't really notice any specific issues with them to be honest. I'd ran an F32 440i on Potenzas for almost four years previous to the G32 and they felt much worse then the G32 but put it down to refinements with the G32 over the F32 rather than the tyres.
I can't get Pilot Sports due to wanting to stay with runflats so am keen to find the best solution to stay with them.
I ran my G32 M440i that was fitted with Turanzas on the recommended tyre pressure setting of 39 psi all round throughout my ownership of the car so I'm a bit surprised to hear you say 44psi is the recommended normal setting?
I'm guessing that you weren't running a G32 when you said the recommended pressures were 44psi?

The car is a G21 M340i touring. The pressure was set in the idrive system, so I only noticed the pressure setting when I had a blow out at 240 miles. I'm pretty sure it was set to 44. That's how it was delivered. Felt like it had rocks on each corner at 44.

I've previously run P Zero run flats and they performed in all scenarios much better. Can't compare to the ride on non-RFTs though.

[bmnut]

Originally Posted by Herr Gross Byte

The car is a G21 M340i touring. The pressure was set in the idrive system, so I only noticed the pressure setting when I had a blow out at 240 miles. I'm pretty sure it was set to 44. That's how it was delivered. Felt like it had rocks on each corner at 44.

I've previously run P Zero run flats and they performed in all scenarios much better. Can't compare to the ride on non-RFTs though.

Thanks for the info, much appreciated.
I have just always set my 'cold' pressures as per the VIN plate on the driver's door frame and never considered what the recommended pressures were showing in the iDrive.
I find the iDrive pressure recommendations seem to track the actual pressures quite closely if not exactly when the car is running and the tyres are responding to variations in temperature.

Also interesting to hear your experience with P Zeros as well.

[bmnut]

Originally Posted by Neovo88

Got a proper tyre depth gauge now (not a ruler), rears are 5.7mm. I think I’ll be on target for 10-11k.

When it comes time to change will be trying P zeros or Eagles F1.

With x drive can you have a different brand tyres at the rears? The fronts won’t need changing they are still on 6.7mm, they be out of sync in terms of tyre changing.

Quick answer..don't know...but...personally I don't think I'd be too keen to have different makes of tyres, even if they are both recommended by BMW, on different axles? (Obviously never mixed makes on the same axle of course!)
Different tyres have different rolling characteristics due to the variation in tread patterns mostly and I'm not sure how this 'feedback information' to the little boxes of one and zeros that control the X-drive system would take to potentially confusing signals, that is assuming that the said little boxes of ones and zeros are actually that bloody clever!

[alFR]

Originally Posted by Neovo88

With x drive can you have a different brand tyres at the rears? The fronts won’t need changing they are still on 6.7mm, they be out of sync in terms of tyre changing.

Watch the tread depth difference too: per this thread the max difference between wheels you can have with xdrive is 2mm.

[bmnut]

Originally Posted by bodyman440

I have the same tyre on my M440i and at just over a 1000 miles noted they were down to 5.5 mm. Took this up with Bridgestone and they say that they start life at 6.6mm.
Now covered 4500 miles and down to around 4mm.
My wife has P zeros same size tyre that have done 1500 miles and 5mm tread.

...and there's a living, breathing example of the difference between makes, thanks for that 'bodyman440'!

The conclusion to all of the comments on this thread would appear to be that of all the BMW approved runflats there is not a lot if difference between P Zeros and Eagle F1s, with the latter maybe having an edge on the former, but the Turanzas are to be avoided at pretty much all costs.
I have a much clearer picture in my mind now of how I'll likely go when it comes to changing the tyres on my car and whether or not to stay with the P Zeros could be a while yet though as I'm only coming up to 13k miles after almost 18 months from new.
Time to get the tread depth gauge out I reckon, but not today it's p*ssing down again just now!

[B6WAF]

Originally Posted by bmnut

The conclusion to all of the comments on this thread would appear to be that of all the BMW approved runflats there is not a lot if difference between P Zeros and Eagle F1s ... but the Turanzas are to be avoided at pretty much all costs.
:

I have some accurate data ... I had Pirelli P Zeros on my last M340i G20 from new. They did 13,641 fairly sensible miles and I sold the car with between 4mm and 5mm remaining. Mileage is low because I have separate winter wheels.

Current car is an M340i G21 with Bridgestone Turanzas on (in the summer). Too early to tell, but sounds like bad news from the comments above !

[bmnut]

Originally Posted by alFR

Watch the tread depth difference too: per this thread the max difference between wheels you can have with xdrive is 2mm.

Yes another valid point so as not to give BMW a potential 'get out of jail free card' if differences greater than the quoted figures were deemed to be the cause of a potential warranty claim for X-drive components such as expensive transfer boxes!

[bmnut]

Originally Posted by B6WAF

I have some accurate data ... I had Pirelli P Zeros on my last M340i G20 from new. They did 13,641 fairly sensible miles and I sold the car with between 4mm and 5mm remaining. Mileage is low because I have separate winter wheels.

Current car is an M340i G21 with Bridgestone Turanzas on (in the summer). Too early to tell, but sounds like bad news from the comments above !

Presumably the majority of those 13,641 miles were on the P Zeros and not the winter tyres?

[B6WAF]

Originally Posted by bmnut

Presumably the majority of those 13,641 miles were on the P Zeros and not the winter tyres?

Yes, all of that was summer mileage on the P Zeros

[bmnut]

Originally Posted by B6WAF

Yes, all of that was summer mileage on the P Zeros

That's good to know, thanks for that!

[bmnut]

Just braved the Baltic temperatures and filled my washer bottle and whilst I was on I checked the tyres and looks like the tread depth is about 5mm all round after just shy of 13k miles with the Pirelli P Zeros so definitely a far better wear rate than the Turanzas.

So to refer back to the original OP, that wear rate on the Turanzas is not good I reckon?

[tyranniux]

My turanzas were done on the rear in the centres at 10k miles. Ran them at 39psi consistently so not over inflated.

I did want to go non RFT eventually but it was annoying to have to replace 4 tires (xdrive) when the rear outsides were still at 4mm and the fronts were an even 5mm.

Swapped them out with Continental sport contact 7 at 10k and am at an even 5mm all round across all 4 tires at my present 17k miles hoefully do me until around 30k which ill be happy woth cinsidering rhe performance of the tires. Improved comfort and superb wet and dry performance just as I wanted. Wouldn't fit Turanzas again if you paid me.

[paulockenden]

I’ve done 13k miles on my Goodyear Eagle F1s, from new. At the service last week they were reported as all four at 7mm.

So that’s yet another plus point for these excellent tyres.

[vadimo]

Originally Posted by paulockenden

I’ve done 13k miles on my Goodyear Eagle F1s, from new. At the service last week they were reported as all four at 7mm.

So that’s yet another plus point for these excellent tyres.

Which ones exactly Asymmetric 5?

[paulockenden]

Originally Posted by vadimo

Which ones exactly Asymmetric 5?

Mine are Asymmetric 3. But I can’t imagine that the 5s wear significantly faster.