BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Wheels + Tires Sponsored by The Tire Rack
  TireRack

KEEP M3POST ALIVE BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER LINK!
Post Reply
 
Thread Tools Search this Thread
      01-19-2008, 03:57 PM   #1
CkDedmon
Private
8
Rep
58
Posts

Drives: Future 335i
Join Date: Jul 2007
Location: San Francisco Bay Area

iTrader: (0)

Do M3's come with RFTs?

Do M3's come with run-flat tires on either the 18" or 19" factory wheels?

It appears that the answer is "no" and you just get the Mobility Kit...kind of surprising considering that BMW provides run-flat tires on the 335.

Then again, I would actually prefer to not have RFTs for ride quality.

Thanks.
Appreciate 0
      01-19-2008, 04:04 PM   #2
southlight
Moderator / European Editor
southlight's Avatar
1492
Rep
6,755
Posts

Drives: X3M
Join Date: Apr 2006
Location: Germany

iTrader: (0)

Like you said the answer is No, there's the M mobility kit.

BTW: a search had answered you question.


Best regards, south
Appreciate 0
      01-19-2008, 04:07 PM   #3
Big Windy
Major General
Big Windy's Avatar
United_States
150
Rep
5,124
Posts

Drives: None
Join Date: Mar 2007
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by CkDedmon View Post
kind of surprising considering that BMW provides run-flat tires on the 335.
Thanks.
bmw also provides a TT 6 cylinder in the 335...does it surprise you that the M3 has a different engine? RFTs have obvious performance limitations and BMW, to my knowledge, has never put RFTs on any M cars.
Appreciate 0
      01-19-2008, 04:24 PM   #4
swiss_cornholio
First Lieutenant
swiss_cornholio's Avatar
Switzerland
33
Rep
379
Posts

Drives: E92 DTC M3 (AW/PS)
Join Date: Mar 2007
Location: Zurich, Switzerland

iTrader: (0)

Quote:
Originally Posted by redmtclimber View Post
RFTs have obvious performance limitations and BMW, to my knowledge, has never put RFTs on any M cars.
That's right, no RFTs for M cars. However I don't see why RFTs should have performance limitations. I have RFTs on my Z4. They are perfect on the track but the downside is that ride comfort suffers, especially if you already have a stiff suspension. E.g. the Z4Ms suspension is stiffer but thanks to the normal tires the ride is still more comfortable than in the regular Z4.

Plus: the RFTs are ridiculously expensive. I'm glad the M3 has cheaper tires so I don't have to worry about tire costs when doing power slides
Appreciate 0
      01-19-2008, 04:34 PM   #5
Big Windy
Major General
Big Windy's Avatar
United_States
150
Rep
5,124
Posts

Drives: None
Join Date: Mar 2007
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by swiss_cornholio View Post
However I don't see why RFTs should have performance limitations.
i'm not entirely sure, but i thought that it had to do with the fact that the sidewalls on RFTs are much more rigid than regular tires. you're right that ride comfort suffers too. maybe another member knows more about RFTs vs. regular tires performance wise.
Appreciate 0
      01-19-2008, 09:17 PM   #6
sdiver68
Expert Road Racer
59
Rep
1,329
Posts

Drives: 07 335i e90, 09 335i e93
Join Date: Jul 2006
Location: St. Louis, MO

iTrader: (3)

Quote:
Originally Posted by redmtclimber View Post
i'm not entirely sure, but i thought that it had to do with the fact that the sidewalls on RFTs are much more rigid than regular tires. you're right that ride comfort suffers too. maybe another member knows more about RFTs vs. regular tires performance wise.
Stiff sidewalls are good for handling.

RFT's usually put up about the same lap times as their non-RFT brothers.

There is some evidence that RFT's might not be as good for acceleration from a dig.
Appreciate 0
      01-19-2008, 09:50 PM   #7
GregW / Oregon
Commander-In-Chief
2070
Rep
8,898
Posts

Drives: 2023 M2 Coupe, 2020 GLE 450
Join Date: Nov 2005
Location: Lake Oswego, OR

iTrader: (3)

Garage List
Runflats

Quote:
Originally Posted by redmtclimber View Post
i'm not entirely sure, but i thought that it had to do with the fact that the sidewalls on RFTs are much more rigid than regular tires. you're right that ride comfort suffers too. maybe another member knows more about RFTs vs. regular tires performance wise.
In 57k miles with my E46 M3 on 19" PS2s, I've had three slow leak punctures, but no "flats" or blowouts. You can repair a normal tire, unlike runflats. That, together with the ride issue, makes me favor this direction. I carry a plug kit and you have a compressor with the MMobility kit. In addition, on trips, I take a space saver spare. I'm happy with this vs. runflats.
__________________

Greg Lake Oswego, Oregon, USA
2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450
Appreciate 0
      01-23-2008, 12:57 AM   #8
hipvspec
Captain
hipvspec's Avatar
United_States
55
Rep
607
Posts

Drives: you crazy
Join Date: Nov 2007
Location: Slippery Parking Lot

iTrader: (3)

Quote:
Originally Posted by redmtclimber View Post
bmw also provides a TT 6 cylinder in the 335...does it surprise you that the M3 has a different engine? RFTs have obvious performance limitations and BMW, to my knowledge, has never put RFTs on any M cars.
good to know..
__________________
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 10:13 AM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST