What are the runflats?

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Creepy Coupe
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Re: What are the runflats?

Post by Creepy Coupe » Tue Mar 12, 2019 3:59 pm

sir richard large wrote:
Tue Mar 12, 2019 3:54 pm
Creepy Coupe wrote:
Tue Mar 12, 2019 1:25 pm

Are they both 18" wheel tests? Reason I ask is the 19" are 72 db and 18" 71 db. Also how many miles have the tyres you tested covered?
No, the RF P0 are on 19" M405 wheels, DOT 2016, mid-life (tread)
The MPSS are on 18" M436 wheels, DOT 2014, mid-low life (tread)

That said, since these are BMW OEM options, im comparing the products "as-is".
For those 2 products specifically, their EU tire label also shows similar discrepancy in noise on a like-size basis.
Which is exactly the sizes I swapped around with on my M235i. I remember the day I put the MPSS back on as I'd sold the car and the 19's and remember thinking. How noisy they were. But there you go. It's all about perception.
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Previous.M235i.M135i. 635d Coupe, E92 M3 manual, E93 M3 DCT Competition Pack. E92 335i, Porsche Cayman S Gen2, 135i Coupe. E92 320d, MK5 R32. MK5 Golf GTi,MK5 Golf GT-TDI,E46 318Ci.

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Spin
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Re: What are the runflats?

Post by Spin » Tue Mar 12, 2019 4:19 pm

If it helps I ran my car with some RFT (Bridgestone 18") for a short period recently as I am selling the wheels they are on and liked the look so thought I'd put them on the car, have to say I was massively surprised as they have come on in leaps and bounds from when I used to have them on a 335d in 2008. I do have adaptive so this may help but I had no issue with them apart from the usual thump over cats eyes when over taking. I certainly wouldn't rush to change them until worn, yes I'd prefer MPSS but the RFT are by no means a bad choice so enjoy the new car when it arrives :)
In terms of grip at this time of the year I never noticed any issues at all, no increased wheel spin etc when pulling out of junctions, I'd say just give them a good try .
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un1eash
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Re: What are the runflats?

Post by un1eash » Tue Mar 12, 2019 6:01 pm

Mine on 18" came with Bridgestone Potenza S001. Much better then run flats of old but still have there positive and negatives.

timskipper
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Re: What are the runflats?

Post by timskipper » Fri Mar 15, 2019 3:53 pm

I picked it up today, pretty damn chuffed. It seems more refined and quieter inside than my '14 M135i - the fake noise is barely detectable really. Anyway, it did come on Bridgestone Potenza S001 runflats. I'll see how I get on with them, but really I would prefer the proper tyres.

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Re: What are the runflats?

Post by ALX87 » Fri Mar 15, 2019 8:00 pm

The car looks great, good work! When it comes time to change I would highly recommend changing to normal tyres. I run Michelin PS4's on my M140 now and have genuinely found it night and day to the run flats in terms of ride comfort and handling. Get the pressures right and you're away.
Alex

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Re: What are the runflats?

Post by timskipper » Sat Mar 16, 2019 11:20 am

"Get the pressures right". Amen to that!

Went out this morning now it's sat overnight and cooled to find the dealer had let it go with 41 in the back and 37 in the front - should be 35 all round. Why do dealers always get this simple thing worng?!

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