19" run flats going in the bin - what's the best replacements?

Just recently priced a pair of Bridgestone Potenza 19" RF's the same as supplied when I bought the car and would you believe the cheapest delivered, fully fitted at a local garage of my choice inc of VAT was ...........Would you believe Asda!!!

The pair are £209 each but you can get a voucher code which gives you 10% discount for any online purchase.
 
My 35is had first Falken FK452 tyres which were ok. After rears were worn I bought some cheap Lingchongfong tyres rear as I was waiting for Michelin PS4S. My old Fiat Punto was better ride!
 
TitanTim said:
Stick some wooden wheels on it, suggest crossply and no worries spending extra on air :lol:

Alternatively MPSS :)

Tim.
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The MPSS have/are being replaced the PS4S - I've got the latter on my 35is, great tyre.
 
Busterboo said:
Nanu said:
Just recently priced a pair of Bridgestone Potenza 19" RF's ...
Mels%20car_zpsby7zzbkc.png
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Beautiful car.
Crap tyres.
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It's the one BMW fit as standard so would expect they know what they are doing. It's my third Zed and all have had the same with no complaints.

Any suggestions for better?
 
Nanu said:
Busterboo said:
Nanu said:
Just recently priced a pair of Bridgestone Potenza 19" RF's ...
Mels%20car_zpsby7zzbkc.png
Click to expand...
Beautiful car.
Crap tyres.
Click to expand...

It's the one BMW fit as standard so would expect they know what they are doing. It's my third Zed and all have had the same with no complaints.
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Heehee , c,mon Buster let's hear it :oops: BMW themselves spec them so why would you not use them when you clearly believe in everything else they print :roll:
 
Why? Because I've owned 24 cars, ranging through 2 Alfas, 2 Buicks, 5 Citroens, 2 Jaguars, a 911, 3 VWs and so on, and driven many more, including an original Ford GT40, a Ferrari F40, a Lamborghini Miura, a Lamborghini Countach, 21 Toyota Crowns, a Lancia Stratos, a Le Havre taxi, a Nottinghamshire County minibus ... et cetera, et cetera ... you get the picture ... and none of them had tyres as bad as the 18" Goodyear Potenza RFTs, two of which were new, that came on my 35iS when I bought it in October last year. I threw them away. :)
 
Busterboo said:
Why? Because I've owned 24 cars, ranging through 2 Alfas, 2 Buicks, 5 Citroens, 2 Jaguars, a 911, 3 VWs and so on, and driven many more, including an original Ford GT40, a Ferrari F40, a Lamborghini Miura, a Lamborghini Countach, 21 Toyota Crowns, a Lancia Stratos, a Le Havre taxi, a Nottinghamshire County minibus ... et cetera, et cetera ... you get the picture ... and none of them had tyres as bad as the 18" Goodyear Potenza RFTs, two of which were new, that came on my 35iS when I bought it in October last year. I threw them away. :)
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I'm not disagreeing with you on the RFTs , i completely agree they are poor by comparison to other tyres available on the market
So if you are ok to go against the recommended rubber for your car why resolutely stick to the pressures they recommend ? :wink:
 
Nanu, you ask for suggestions for better. Well, any of the top 5, for starters. Michelin, Goodyear Eagle, Pirelli, Continental or Dunlop. Is that enough? :)

A few days after I bought my 35iS, I thought I'd made a bad mistake. When I pushed it, its road-holding was appalling. It did all the bad things members say that Bridgestone RFTs do, not least lurching sideways at high speed after tram-lining as if somebody else had grabbed the steering wheel.

So, I put Pirelli P Zeros on it and they're as good as the Michelin PS3s I had on my 911. Now, the car is what I hoped I was buying.
 
Busterboo said:
and none of them had tyres as bad as the 18" Goodyear Potenza RFTs, two of which were new, that came on my 35iS when I bought it in October last year. I threw them away. :)
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Potenzas are made by Bridgestone
Maybe you have knock offs on your car.
 
mr wilks said:
Busterboo said:
mr wilks said:
So if you are ok to go against the recommended rubber for your car why resolutely stick to the pressures they recommend ? :wink:
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Because physics is physics. :D
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I didn't study physics , i preferred logic instead :P
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Will you accept this logic, then? :)

Post by Busterboo » Fri Jan 13, 2017 1:31 pm

Have just phoned 4 tyre manufacturers and asked each one the same question:
"Are run-flat and non-run-flat tyre pressures the same?"
Their answers were:

Michelin: "The same."
Goodyear/Dunlop: "The same."
Bridgestone: "Tyre pressures depend on the vehicle."
Pirelli: "We do not give tyre pressures. Follow your car maker's advice."
 
Busterboo said:
mr wilks said:
Busterboo said:
Because physics is physics. :D
Click to expand...

I didn't study physics , i preferred logic instead :P
Click to expand...

Will you accept this logic, then? :)

Post by Busterboo » Fri Jan 13, 2017 1:31 pm

Have just phoned 4 tyre manufacturers and asked each one the same question:
"Are run-flat and non-run-flat tyre pressures the same?"
Their answers were:

Michelin: "The same."
Goodyear/Dunlop: "The same."
Bridgestone: "Tyre pressures depend on the vehicle."
Pirelli: "We do not give tyre pressures. Follow your car maker's advice."
Click to expand...

Yes why wouldn't i :? i have never said anything to contradict that ? What i don't accept is the need for 44psi in a rear 255 30 19 tyre on a Z4 just because BMW say so :wink:
 
mr wilks said:
Busterboo said:
mr wilks said:
I didn't study physics , i preferred logic instead :P
Click to expand...

Will you accept this logic, then? :)

Post by Busterboo » Fri Jan 13, 2017 1:31 pm

Have just phoned 4 tyre manufacturers and asked each one the same question:
"Are run-flat and non-run-flat tyre pressures the same?"
Their answers were:

Michelin: "The same."
Goodyear/Dunlop: "The same."
Bridgestone: "Tyre pressures depend on the vehicle."
Pirelli: "We do not give tyre pressures. Follow your car maker's advice."
Click to expand...

Yes why wouldn't i :? i have never said anything to contradict that ? What i don't accept is the need for 44psi in a rear 255 30 19 tyre on a Z4 just because BMW say so :wink:
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Because ... er ... they're the ... er ... manufacturers.

And I'm happy with BMW's figures because they're almost the same as Porsche's for a similar vehicle. :driving:
 
Busterboo said:
mr wilks said:
Busterboo said:
Will you accept this logic, then? :)

Post by Busterboo » Fri Jan 13, 2017 1:31 pm

Have just phoned 4 tyre manufacturers and asked each one the same question:
"Are run-flat and non-run-flat tyre pressures the same?"
Their answers were:

Michelin: "The same."
Goodyear/Dunlop: "The same."
Bridgestone: "Tyre pressures depend on the vehicle."
Pirelli: "We do not give tyre pressures. Follow your car maker's advice."
Click to expand...

Yes why wouldn't i :? i have never said anything to contradict that ? What i don't accept is the need for 44psi in a rear 255 30 19 tyre on a Z4 just because BMW say so :wink:
Click to expand...

Because ... er ... they're the ... er ... manufacturers.

And I'm happy with BMW's figures because they're almost the same as Porsche's for a similar vehicle. :driving:
Click to expand...

So to concur you are happy to believe they know best when you want to but are happy to contradict them when you don't :oops: :wink:
 
Thanks for the advice which I will take note of. Will be sticking to RF's though as I find with the suspension on the 35is they perform better than the same tyre did without on my previous Zeds
 
mr wilks said:
So to concur you are happy to believe they know best when you want to but are happy to contradict them when you don't :oops: :wink:
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No, not at all.

BMW's relationship with Bridgestone is commercial, just like, for example, Jaguar's with Pirelli and between other car & tyre manufacturers. Mutual back-scratching. BMW's use of RFTs is a mixture of cost-saving, simplification of design & production and a nod to ecology. They are, however, very poor tyres, which many people dislike and which I have found to be dreadful.

BMW's recommended tyre pressures, on the other hand, are a matter of relatively simple physics that relate to, among other factors, car weight, tyre profiles and maximum speed. Other car manufacturers use the same factors for their recommendations. So, my use of BMW's, Porsche's or any other car maker's recommended pressures is not a matter of being "happy to believe they know best", but one of accepting that they can do the maths.
 
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