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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > RFT or NON RFT



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      12-21-2011, 05:58 PM   #1
glo459
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RFT or NON RFT

Anyone got any recommendations as to stay with RFT tires or should I go Non-Run flat tires?

E93 front 225/40/18

Thanks!
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      12-21-2011, 10:25 PM   #2
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Quote:
Originally Posted by glo459 View Post
Anyone got any recommendations as to stay with RFT tires or should I go Non-Run flat tires?

E93 front 225/40/18

Thanks!
Just got Michelin PSS non-RFTs to replace my OEM Bridgestone RFTs on my E93 M-Sport (18s).

Short first take: Much less harsh over sharp hits (e.g., seams, cracks, potholes); turn-in precision/ crispness still great, if not quite as sharp; ride is silky; can't say for sure about grip around turns until more miles; straight line grip under heavy throttle seems obviously better. Getting the Conti repair kit for the trunk.
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      12-22-2011, 01:51 AM   #3
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Quote:
Originally Posted by M-Steep View Post
Just got Michelin PSS non-RFTs to replace my OEM Bridgestone RFTs on my E93 M-Sport (18s).

Short first take: Much less harsh over sharp hits (e.g., seams, cracks, potholes); turn-in precision/ crispness still great, if not quite as sharp; ride is silky; can't say for sure about grip around turns until more miles; straight line grip under heavy throttle seems obviously better. Getting the Conti repair kit for the trunk.
Thanks for the feedback!
Do you think it'll be a problem if I use non run flats for the front, and keep the oem run flats in the rear at the same time?
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      12-22-2011, 09:25 AM   #4
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I got conflicting advice on this; decided to replace all four, though the fronts were still ok. Glad I did, w that the money's spent.
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      12-22-2011, 09:35 AM   #5
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Quote:
Originally Posted by glo459 View Post
Do you think it'll be a problem if I use non run flats for the front, and keep the oem run flats in the rear at the same time?
Big problem. The front tires won't be as stiff as the rears which will upset the balance of the car. I wouldn't do it.

Recommend you get 4 non-RFT's. The new Michelin Pilot Super Sports seem to be the best tire you can buy. You can find tirerack's test results here: http://www.tirerack.com/tires/tests/...y.jsp?ttid=148.
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      12-22-2011, 12:11 PM   #6
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Quote:
Originally Posted by driverman View Post
Big problem. The front tires won't be as stiff as the rears which will upset the balance of the car. I wouldn't do it.

Recommend you get 4 non-RFT's. The new Michelin Pilot Super Sports seem to be the best tire you can buy. You can find tirerack's test results here: http://www.tirerack.com/tires/tests/...y.jsp?ttid=148.
+1

glo459, whichever way you decide to go, be sure all four tires are matching.

Tires http://www.tirerack.com/a.jsp?a=AH8&...ires/index.jsp
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      12-22-2011, 01:46 PM   #7
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Quote:
Originally Posted by glo459 View Post
Thanks for the feedback!
Do you think it'll be a problem if I use non run flats for the front, and keep the oem run flats in the rear at the same time?
No problem - as long as you never drive on wet roads or over 25 mph on dry ones.

See Gary's post.

Tom
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      12-22-2011, 02:15 PM   #8
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Thanks you for all the advise! I'll be switching all four tires to Michelin PSS.
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      12-22-2011, 03:17 PM   #9
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Quote:
Originally Posted by driverman View Post
Big problem. The front tires won't be as stiff as the rears which will upset the balance of the car. I wouldn't do it.

Recommend you get 4 non-RFT's. The new Michelin Pilot Super Sports seem to be the best tire you can buy. You can find tirerack's test results here: http://www.tirerack.com/tires/tests/...y.jsp?ttid=148.
+1

If you are going to make the switch to non-RFTs, you should do all four rather than just a pair. Overall though, those who do switch over are often pretty satisfied with their decision.
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      12-22-2011, 03:58 PM   #10
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Non RFT all the way!!!
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      12-24-2011, 03:06 AM   #11
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Quote:
Originally Posted by Lawrence@bavarianx View Post
Non RFT all the way!!!
+1 The RFTs are heavy and cost waaay more than a good set of non-rft tires.

If you decide to go the non-RFT route, replace the whole set and buy a road side kit for flat tire emergencies!
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      12-27-2011, 12:04 AM   #12
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Switched from the OEM runflats to a set of Michelin PSS non-runflats a couple months ago. Thrilled with my decision. Your spine will appreciate it going over bumps (especially if you've got a sport-tuned suspension). Had them out at the track twice and performance is sweet.
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      12-27-2011, 12:10 AM   #13
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Quote:
Originally Posted by o2centre View Post
Switched from the OEM runflats to a set of Michelin PSS non-runflats a couple months ago. Thrilled with my decision. Your spine will appreciate it going over bumps (especially if you've got a sport-tuned suspension). Had them out at the track twice and performance is sweet.
How about steering response and noise compared to the RFT's?
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      12-27-2011, 02:23 PM   #14
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I am in the same process and going non-RFT. I just havn't made up my mind which tire to go with.

I am also pondering going with a performance all season as I don't have a winter set. On my 325ci I had winter tires and used them for one season. The car ran fine with summer ultra high perf tires. I am not sure if the 335i will react the same in the snow!

driverman's question regarding steering response is actually very good and I have the same question along with another related question about steering response/performance with an all season over a summer performance tire.
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      12-28-2011, 01:20 AM   #15
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Quote:
Originally Posted by driverman View Post
How about steering response and noise compared to the RFT's?
I never tracked the car with the run flats so can't speak to the difference in steering response under high performance conditions. As far as everyday driving goes though, I don't detect much change in handling. The primary difference is a more forgiving ride over bumps and ruts. The car does less of that jerky "shimmying" right and left when going over bumps.

Haven't heard a noticeable change in noise level.
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      12-28-2011, 01:27 AM   #16
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Quote:
Originally Posted by witeagle View Post

I am also pondering going with a performance all season as I don't have a winter set. On my 325ci I had winter tires and used them for one season. The car ran fine with summer ultra high perf tires. I am not sure if the 335i will react the same in the snow!
Was just back on the east coast visiting my folks for Christmas. They live halfway up a mountain and my dad has Hakkapeliitta studded snow tires on his car. Loud as hell and they eat at least 5 MPG off his gas mileage. Made me thankful I don't have to worry about that here in socal!
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