Best run flats

Tim Field · 05-13-2018, 03:02 PM

Hi there,

I have the following on my BMW 3 series (2017):

Front: 18 with 225 / 45 R18 tyres
Rear:18 with 255 / 40 R18 tyres

I wanted Michelin pilot sport ps2 rf (run flat) but these aren't available in the 45 size. This is annoying as I can't seem to find a decent tire out there other than that. What are you guys running?

Thanks, Tim

davefromfla · 05-13-2018, 03:04 PM

There are no good runflats.

leejak · 05-13-2018, 03:07 PM

I have an F32 with run flats, but I also have a f13 with the pirelli cinturo run flats that give a pretty good ride.....slight sacrifice in stickiness, but reasonable ride....unfortunately not available in sizes for f32

Hawko · 05-13-2018, 03:21 PM

Ditched my run flats which were the same size as yours as soon as I could for Goodyear Eagle F1 - no comparison.

Billfitz · 05-13-2018, 06:38 PM

Quote:

Originally Posted by Tim Field

I wanted Michelin pilot sport ps2 rf (run flat) but these aren't available in the 45 size.

You wouldn't want RFT in a 45 aspect ratio. The sidewalls are just too short to give enough cushion to make up for the added stiffness of RFTs. The ride would be too harsh, too noisy, and prone to pothole damage, both tire and rim. Why do you think dealer offered wheel and rim insurance is a big thing now when ten years ago it didn't exist? RFTs on large rims.

jmg · 05-13-2018, 09:06 PM

Get some PS4S or Continental Extreme Sports and a tire fix it kit from amazon.

paul e · 05-14-2018, 10:12 AM

You could change the fronts to 245/40.

BEAR-AvHistory · 05-14-2018, 12:02 PM

Have had no problems or driving issues with the current 19" RFT. I did replace the RFT on my 2011 335IS. They were very harsh over the slightest ripple in the road.

If you are not doing track days & have Adaptive Suspension would not bother with making a switch.

wantafastone · 05-14-2018, 01:39 PM

Ditched the rfts and got non rfts and a spare space saver tire

dorkiedoode · 05-14-2018, 04:19 PM

I’m removing the run flat once I reach 10k to get better non run flat and use oem rf for spare.

ontheway · 05-14-2018, 04:40 PM

Quote:

Originally Posted by Tim Field

Hi there,
I wanted Michelin pilot sport ps2 rf (run flat) but these aren't available in the 45 size. This is annoying as I can't seem to find a decent tire out there other than that. What are you guys running?

I'm on 19s and also wanted a PS Variant but not available here. Ended up with pzero rft which are a massive improvement in grip over the OEM Bridgestone.

BEAR-AvHistory · 05-14-2018, 08:40 PM

Quote:

Originally Posted by ontheway

I'm on 19s and also wanted a PS Variant but not available here. Ended up with pzero rft which are a massive improvement in grip over the OEM Bridgestone.

Think a lot of the run flats suck comments are echo chamber regurgitations. It gets repeated enough & "ditch the RFTs" becomes conventional wisdom. In the past RFT (my 2011 335is) were really bad.

Last two cars 435/440 did not show any need to swap the RTF for get flats. Note both cars had Power kits & the Adaptive Suspension, one with 18" wheels & the 440 with 19"s.

Tim Field · 05-20-2018, 05:36 AM

Thanks all, convinced me to look at other options. Is Pilot Sport 4 the best option?

Cheers, Tim

Tim Field · 05-20-2018, 05:37 AM

Thanks all, convinced me to look at other options. Is Pilot Sport 4s the best option?

Cheers, Tim

NormanConquest · 05-20-2018, 06:43 AM

Quote:

Originally Posted by davefromfla

There are no good runflats.

This

Tim Field · 05-20-2018, 08:54 AM

I can get PS4 - s version isn't available due to them being 18inch. Those still first choice?

Buzzo · 05-20-2018, 09:30 AM

Quote:

Originally Posted by Tim Field

I can get PS4 - s version isn't available due to them being 18inch. Those still first choice?

Coming from MPSS, I'm giving Indyhawk 500's a whirl; raving reviews half the price.

nickf30 · 05-20-2018, 09:54 AM

Quote:

Originally Posted by Tim Field

I can get PS4 - s version isn't available due to them being 18inch. Those still first choice?

I had PS4S for about 300 miles now they're fantastic tires. No doubt you can get something perform similar at dry but man these tires glue my car to the road in pouring rain and significantly quieter than PSS. PS4S (18" OEM staggered Size) are available in US most likely it's temp backorder for UK:

Mbbrewer · 05-20-2018, 08:57 PM

Quote:

Originally Posted by Buzzo

Quote:

Originally Posted by Tim Field

I can get PS4 - s version isn't available due to them being 18inch. Those still first choice?

Coming from MPSS, I'm giving Indyhawk 500's a whirl; raving reviews half the price.

Had mine for about 100 miles now. Absolutely fantastic tires. For a daily driver they perform 100% as well as the MPSS or 4S.

jgoens · 05-20-2018, 09:15 PM

Quote:

Originally Posted by Buzzo

Coming from MPSS, I'm giving Indyhawk 500's a whirl; raving reviews half the price.

Quote:

Originally Posted by Mbbrewer

Had mine for about 100 miles now. Absolutely fantastic tires. For a daily driver they perform 100% as well as the MPSS or 4S.

I have had mine for a week now and this is what you should get. Trust me. You don't have to pay top dollar for awesome tires. Those of us who know...know.

Elvisfan · 05-21-2018, 05:11 PM

Quote:

Originally Posted by Billfitz

You wouldn't want RFT in a 45 aspect ratio. The sidewalls are just too short to give enough cushion to make up for the added stiffness of RFTs. The ride would be too harsh, too noisy, and prone to pothole damage, both tire and rim. Why do you think dealer offered wheel and rim insurance is a big thing now when ten years ago it didn't exist? RFTs on large rims.

I know I’m new on this forum. I also know that low profile tires are more prone to blowouts. However,the insurance companies wouldn’t sell tire and rim insurance if they didn’t think they would make money on it. I have 40s on my 430ix. They offered tire and rim. Therefore they expect to make money on it. In my opinion.

mike78 · 05-22-2018, 08:02 AM

I have 2013 BMW F30 320d M-Sport with M-suspension 225/40/18 and 255/40/18. The car came with Pirelli RFT and switched to Michelin Pilot Sport 4 non-RFT.

The car above 120km/h is terrible. Its like driving an old car. No stability. Very soft.
I think BMW has optimized the suspension to work with runflat. Dont make the same mistake as me. You will regret it.

I have done 2 times balancing and still nothing.

DO EVER PUT MICHELIN PILOT SPORT 4 in BMW F30 with M-suspension!

I have already started the process to give them back.

05-13-2018, 03:02 PM	#1
Tim Field Registered 4 Rep 4 Posts Drives: 3 Series Touring 2017 - 320D Join Date: May 2018 Location: UK iTrader: (0)	Best run flats - selection is rubbish! Hi there, I have the following on my BMW 3 series (2017): Front: 18 with 225 / 45 R18 tyres Rear:18 with 255 / 40 R18 tyres I wanted Michelin pilot sport ps2 rf (run flat) but these aren't available in the 45 size. This is annoying as I can't seem to find a decent tire out there other than that. What are you guys running? Thanks, Tim
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05-13-2018, 03:04 PM	#2
davefromfla First Lieutenant 114 Rep 354 Posts Drives: 2021 M440ix Join Date: Nov 2010 Location: Florida iTrader: (0)	There are no good runflats.
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05-13-2018, 03:07 PM	#3
leejak Private First Class 46 Rep 125 Posts Drives: E92 M3, F12 6401ED, F32 428i Join Date: Nov 2014 Location: So Cal iTrader: (0)	I have an F32 with run flats, but I also have a f13 with the pirelli cinturo run flats that give a pretty good ride.....slight sacrifice in stickiness, but reasonable ride....unfortunately not available in sizes for f32
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05-13-2018, 03:21 PM	#4
Hawko Private 15 Rep 51 Posts Drives: F36 435D 2019 Join Date: Mar 2018 Location: UK iTrader: (0)	Ditched my run flats which were the same size as yours as soon as I could for Goodyear Eagle F1 - no comparison.
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05-13-2018, 09:06 PM	#6
jmg Lieutenant General 18663 Rep 14,108 Posts Drives: G82 M4C X-Drive Join Date: Mar 2013 Location: Orange County, CA iTrader: (1) Garage List 2022 G82 M4C X-Drive [9.85] 2018 F80 M3 CS [9.87] 2019 i3 BEV [0.00]	Get some PS4S or Continental Extreme Sports and a tire fix it kit from amazon. __________________ 2022 G82///M4 Competition X-Drive - KW-HAS, EBC Bluestuff, Millway Race Camber Plates, Cup2 Connect, PSI High Flow Midpipe, Lightweight Front Lip, M Perf Flow Through Wing Previous • 2018 F80 ///M3 CS • 2016 F80 ///*M3 IG: Raging_G82
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05-14-2018, 10:12 AM	#7
paul e Captain 420 Rep 841 Posts Drives: 340i xDrive 6MT Join Date: Oct 2015 Location: South Carolina iTrader: (0)	You could change the fronts to 245/40.
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05-14-2018, 12:02 PM	#8
BEAR-AvHistory 2020 Z4 M40i - 2022 M4C Convt 3127 Rep 5,264 Posts Drives: 2020 Z4 M40i - 2022 M4C Convrt Join Date: Jun 2011 Location: Raleigh, NC - OIB, NC iTrader: (0) Garage List 1965 COBRA (FFR rep ... [8.57] 2023 Jeep Wrangler ... [9.50] 2009 Yamaha V-Star [0.00] Cars 2-BMW, 2-FORD, ... [0.00] 2023 Ford Expeditio ... [0.00] 2020 Z4 M40i [10.00] 2022 BMW M4C [7.25] 1998 FORD Ranger 4X4 [0.00]	Have had no problems or driving issues with the current 19" RFT. I did replace the RFT on my 2011 335IS. They were very harsh over the slightest ripple in the road. If you are not doing track days & have Adaptive Suspension would not bother with making a switch. __________________ Kevin Dravit Gray, Black Leather, Moonlight Roof, Red Calipers 2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT
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05-14-2018, 01:39 PM	#9
wantafastone Enlisted Member 9 Rep 46 Posts Drives: 335i Join Date: Sep 2016 Location: jc, tn iTrader: (0)	Ditched the rfts and got non rfts and a spare space saver tire
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05-14-2018, 04:19 PM	#10
dorkiedoode Private 21 Rep 57 Posts Drives: 2018 BMW 340i M Performance Join Date: Oct 2017 Location: SO.CaL iTrader: (1)	I’m removing the run flat once I reach 10k to get better non run flat and use oem rf for spare.
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05-20-2018, 05:36 AM	#13
Tim Field Registered 4 Rep 4 Posts Drives: 3 Series Touring 2017 - 320D Join Date: May 2018 Location: UK iTrader: (0)	Thanks all, convinced me to look at other options. Is Pilot Sport 4 the best option? Cheers, Tim
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05-20-2018, 05:37 AM	#14
Tim Field Registered 4 Rep 4 Posts Drives: 3 Series Touring 2017 - 320D Join Date: May 2018 Location: UK iTrader: (0)	Thanks all, convinced me to look at other options. Is Pilot Sport 4s the best option? Cheers, Tim
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05-20-2018, 08:54 AM	#16
Tim Field Registered 4 Rep 4 Posts Drives: 3 Series Touring 2017 - 320D Join Date: May 2018 Location: UK iTrader: (0)	I can get PS4 - s version isn't available due to them being 18inch. Those still first choice?
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05-22-2018, 08:02 AM	#22
mike78 Second Lieutenant 11 Rep 207 Posts Drives: BMW F30 320d M-Sport (2013) Join Date: Oct 2017 Location: Greece iTrader: (0)	I have 2013 BMW F30 320d M-Sport with M-suspension 225/40/18 and 255/40/18. The car came with Pirelli RFT and switched to Michelin Pilot Sport 4 non-RFT. The car above 120km/h is terrible. Its like driving an old car. No stability. Very soft. I think BMW has optimized the suspension to work with runflat. Dont make the same mistake as me. You will regret it. I have done 2 times balancing and still nothing. DO EVER PUT MICHELIN PILOT SPORT 4 in BMW F30 with M-suspension! I have already started the process to give them back.
	Appreciate 0 Quote