Replacing Run Flats - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series & 4 Series > E90/E91/E92/E93 (2006 - 2013)

E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 05-13-2014, 07:45 PM
mwb22 mwb22 is offline
Registered User
Location: 18940
 
Join Date: May 2014
Posts: 3
Mein Auto: 2008 335XI
Replacing Run Flats

I have a question about replacing run flats. I searched through some good info, but didn't quite find the answer to this question. I have a 2008 335xi. I put new tires on about one year and 25k miles ago, and have about half the tire life left. I'm thinking of moving away from the run flats, for a number of reasons.

My right front tire has developed a small bulge and is slowly losing air - likely from hitting a pothole. I need at least one new tire, but I'd like to avoid buying more run flats. If necessary, I'd buy one, but I want to avoid buying a whole set.

Is it possible to buy two non-run flat tires for the front, while keeping the run flats on the back? Will there be any adverse consequences, particularly with the x-drive? I'd appreciate any advice. Thank you in advance.
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 05-13-2014, 09:40 PM
floydarogers's Avatar
floydarogers floydarogers is offline
Pedant and Curmudgeon
Location: Renton, WA
 
Join Date: Oct 2010
Posts: 6,205
Mein Auto: 335d, 328d, Toyota T100
Quote:
Originally Posted by mwb22 View Post
...
Is it possible to buy two non-run flat tires for the front, while keeping the run flats on the back? Will there be any adverse consequences, particularly with the x-drive? I'd appreciate any advice. Thank you in advance.
It's very likely that the handling would be adversely affected, possibly in a severe manner.
Reply With Quote
  #3  
Old 05-14-2014, 06:38 AM
need4speed's Avatar
need4speed need4speed is offline
Officially Welcomed to the 'Fest
Location: South Carolina
 
Join Date: May 2006
Posts: 5,495
Mein Auto: 16 435 CV Msport PPK, Q5
Very bad idea to mix RFT and go flat tires. Bad handling implications. Check some of the old posts in the tire section of the 'Fest. Gary from tire rack is our resident tire expert. I would buy 4 go flats and a conti kit. Likley cheaper, or close to it than buying 2 new run flats, especially for the back. N4S
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 05-14-2014, 07:14 AM
birdman15 birdman15 is offline
Ford FX4'n & Bimmer life
Location: Burlington, Ontario
 
Join Date: Apr 2013
Posts: 140
Mein Auto: 2008 328xi
get all 4 new tires NON Run Flats and a patch kit with a small compressor.
better ride
saving some $

I just did not too long ago and very happy.
Reply With Quote
  #5  
Old 05-14-2014, 07:55 AM
daytrader daytrader is offline
Officially Welcomed to the 'Fest
Location: VA
 
Join Date: Sep 2009
Posts: 1,188
Mein Auto: 2010 E92 335i
Pretty much 2 ways to go here, bite a bullet and buy all 4 new(best to do this when all 4 to be replaced are fairly close to the end of their usefulness - makes practical sense) or do patch work, ie replace one by one as needed - not optimal but economical. Plus I will add, RFs are getting better with each gen and have a convenience factor built in. Mixing is not recommended. So if you can't cope with the ride comfort, do all 4 w/ standard tires.
__________________
E92 335i/6MT/ZSP & some Dinan bits - sold.
2015 M3/F80, SO, Exc pkg/blk, ZMT, 19" slv

Last edited by daytrader; 05-14-2014 at 07:57 AM.
Reply With Quote
  #6  
Old 05-14-2014, 07:57 AM
es330 es330 is offline
Registered User
Location: Phoenix
 
Join Date: May 2014
Posts: 4
Mein Auto: 2011 335i Sedan
I'm curious, what do you do about a spare if you remove the run flats?
Reply With Quote
  #7  
Old 05-14-2014, 08:08 AM
fdriller9 fdriller9 is offline
Officially Welcomed to the 'Fest
Location: NJ/Philly
 
Join Date: Oct 2006
Posts: 8,080
Mein Auto: '06 AW 330xi
I run non-RFT blizzaks in front and RFT conti all seasons in the rear for my winter setup.

I inflate the front more than the rear to compensate for the stiffer RFT sidewall. Handles just fine.

However, in the winter, I'm not pushing my car nearly as hard as I do in the summer months.

If you don't push your car or do any spirited driving, I think you'll be fine.

With all that being said, it is recommended you don't mix.

At the very least, you NEED to be replacing in pairs. It sucks to throw away one good tire but as with all tire and suspension related components, it is best to replace in pairs. You can always try your luck selling the good used tire on a forum or craigslist.
__________________

| LCI Msport Conversion | Exotic Tuning Front Lip | H&R Coilovers | M3 Subframe Bushings | Custom Polyurethane Shore A90 Tension Strut Bushings | E93 M3 23.6mm Rear Sway Bar | UUC Front Sway Bar | Custom Heim Joint Rear Control Arms | Apex ARC-8 | Dunlop Direzza ZII Star Spec | Modified Dinan Cold Air Intake | aFe Oiled Drop-in Filter | Custom Hand-Made LED Angel Eyes | Alpine MRP-M500 | Custom LED Reverse Lights | OEM Blacklines | BMW Performance Trunk Spoiler |

Last edited by fdriller9; 05-14-2014 at 08:09 AM.
Reply With Quote
  #8  
Old 05-14-2014, 10:32 AM
Dwight_Schrute's Avatar
Dwight_Schrute Dwight_Schrute is offline
I Know Nothing
Location: Sunny Pacific Northwest
 
Join Date: Feb 2009
Posts: 658
Mein Auto: '10 E92 335i
OP you own an Xi and said you have half the tread left on your current tires? I'm not expert but everything I've read leads me to believe that replacing only 2 tires on an AWD vehicle when the other 2 have much less tread can lead to issues with your differential. I could be wrong but you may want to speak with someone who is an authority just to be certain.
__________________

2010 E92 335i
2011 Range Rover Sport Supercharged
1984 Toyota Tercel Wagon 4WD
2007 E93 328i (Sold)
2002 Ford Focus SVT (Sold)
2001 Ford SVT Lightning (Sold)
1992 Ford Taurus SHO (Totaled)
1983 BMX (Totaled... Twice)
Reply With Quote
  #9  
Old 05-14-2014, 10:46 AM
pauljcl pauljcl is offline
Registered User
Location: Miami, FL
 
Join Date: Feb 2014
Posts: 99
Mein Auto: '11-335i conv., 09RX350
Quote:
Originally Posted by floydarogers View Post
It's very likely that the handling would be adversely affected, possibly in a severe manner.
I don't really see the problem with one axle having RFTs and the other not. IMHO, it is very much an urban legend that one should not. One mixes snow tires and regular tires etc.... I would not hesitate to do it, after sorting out pressures to compensate a little for sidewall stiffness variance.
Reply With Quote
  #10  
Old 05-14-2014, 11:02 AM
birdman15 birdman15 is offline
Ford FX4'n & Bimmer life
Location: Burlington, Ontario
 
Join Date: Apr 2013
Posts: 140
Mein Auto: 2008 328xi
Quote:
Originally Posted by es330 View Post
I'm curious, what do you do about a spare if you remove the run flats?
well you could put one ( spare ) in your trunk if you really wanted to.

or

http://www.tirerack.com/accessories/...nce+and+Safety
Reply With Quote
  #11  
Old 05-14-2014, 11:22 AM
pauljcl pauljcl is offline
Registered User
Location: Miami, FL
 
Join Date: Feb 2014
Posts: 99
Mein Auto: '11-335i conv., 09RX350
Quote:
Originally Posted by birdman15 View Post
well you could put one ( spare ) in your trunk if you really wanted to.

or

http://www.tirerack.com/accessories/...nce+and+Safety
You can also buy a 'donut' (space-saver) spare, for ex. at Bavauto.com. That is what I did - put it in the trunk even though I have RFTs for the moment (until they wear out). I have seen situations where the rim gets bent from a large pothole and the whell is unuseable, so I prefer to have a spare anyway. I have an E93 (convertible) - not much trunk space left!
Reply With Quote
  #12  
Old 05-14-2014, 12:17 PM
galahad05's Avatar
galahad05 galahad05 is offline
Better with Butter
Location: Long Island, NY
 
Join Date: Aug 2007
Posts: 2,526
Mein Auto: 335i sedan 6MT
I've had the equivalent of the conti-comfort kit for a few years now. Man, let me tell you, that thing has never been useful to me (except as a general tire compressor thing). Every tire issue I've had involved the sidewall and/or bent rim. I think I may go the donut route or even go back to runflats next round.
__________________
Don't resent growing old. Many are denied the privilege.
-- Irish Proverb

Reply With Quote
  #13  
Old 05-14-2014, 01:37 PM
mwb22 mwb22 is offline
Registered User
Location: 18940
 
Join Date: May 2014
Posts: 3
Mein Auto: 2008 335XI
Quote:
Originally Posted by pauljcl View Post
I don't really see the problem with one axle having RFTs and the other not. IMHO, it is very much an urban legend that one should not. One mixes snow tires and regular tires etc.... I would not hesitate to do it, after sorting out pressures to compensate a little for sidewall stiffness variance.
I'd have no qualms about mixing (or at least fewer qualms) if I did not have the x-drive, but I didn't know if mixing had an impact on the AWD.

With respect to driving, I like to have fun with the car - I don't drive it super hard, but I do like to take advantage of the performance where I can.
Reply With Quote
  #14  
Old 05-15-2014, 11:51 AM
fdriller9 fdriller9 is offline
Officially Welcomed to the 'Fest
Location: NJ/Philly
 
Join Date: Oct 2006
Posts: 8,080
Mein Auto: '06 AW 330xi
The difference in tread depth from a new and old tire should not affect the transfer case. It will certainty NOT affect the differential.

I just mounted new Bridgestone pole positiojn S-04 tires on the front of my xi and still have the worn Michelin PSS tires on the rear. The inners are showing cords.

I've been driving like this for the past week and no issues. The rolling diameters are well within 1%, front vs rear. I'll be mounting the rear S-04s today or tomorrow. Whenever I find time at the shop
__________________

| LCI Msport Conversion | Exotic Tuning Front Lip | H&R Coilovers | M3 Subframe Bushings | Custom Polyurethane Shore A90 Tension Strut Bushings | E93 M3 23.6mm Rear Sway Bar | UUC Front Sway Bar | Custom Heim Joint Rear Control Arms | Apex ARC-8 | Dunlop Direzza ZII Star Spec | Modified Dinan Cold Air Intake | aFe Oiled Drop-in Filter | Custom Hand-Made LED Angel Eyes | Alpine MRP-M500 | Custom LED Reverse Lights | OEM Blacklines | BMW Performance Trunk Spoiler |
Reply With Quote
  #15  
Old 05-19-2014, 09:55 AM
mlampe mlampe is offline
A BMW Convert
Location: Indianapolis, IN
 
Join Date: May 2014
Posts: 6
Mein Auto: 328i convertible
What are the best non-RFT for the 328i?

I have to replace my RFT's on my 328I conv. What have you found to be a good high-performance all season? Have not seen many postings on what is a great tire?
Reply With Quote
  #16  
Old 05-19-2014, 07:35 PM
cazzopazzo cazzopazzo is offline
Officially Welcomed to the 'Fest
 
Join Date: Mar 2014
Posts: 380
Mein Auto:
Toyo proxes 4 plus incredible ride..


Sent from BimmerApp mobile app
Reply With Quote
  #17  
Old 05-20-2014, 03:10 AM
spankey spankey is offline
Officially Welcomed to the 'Fest
Location: PA
 
Join Date: Sep 2013
Posts: 272
Mein Auto: 335xi
I second the toyo's! I'm getting them this summer when my DWS's finally wear out! My local shop which they do allot of tunner cars as well swear by them! They say they last longer, better ride and are cheaper as well. All around great tire! They all run them and by the looks of them, look like a great tire! I can report more when I slap them on my 335xi this summer.


Sent from BimmerApp mobile app
Reply With Quote
  #18  
Old 05-23-2014, 06:01 PM
mlampe mlampe is offline
A BMW Convert
Location: Indianapolis, IN
 
Join Date: May 2014
Posts: 6
Mein Auto: 328i convertible
Hey thanks for the inputs- I had Toyo's on my Maxima and they were great cornering. Decided to go with the Michelin Pilot, went to go get them put on and realized that I did not have the lug key (didn't come when I bought it used) Heading off to the dealer tomorrow to see if they can order one for me. Can't wait- the rear tires are almost bald and I have not taken this out to see what it will do yet. Will let you know what I think of the Michelins.
Reply With Quote
  #19  
Old 05-23-2014, 06:02 PM
cazzopazzo cazzopazzo is offline
Officially Welcomed to the 'Fest
 
Join Date: Mar 2014
Posts: 380
Mein Auto:
Ok sounds good .. Enjoy ..


Sent from BimmerApp mobile app
Reply With Quote
  #20  
Old 05-24-2014, 05:04 AM
need4speed's Avatar
need4speed need4speed is offline
Officially Welcomed to the 'Fest
Location: South Carolina
 
Join Date: May 2006
Posts: 5,495
Mein Auto: 16 435 CV Msport PPK, Q5
Quote:
Originally Posted by es330 View Post
I'm curious, what do you do about a spare if you remove the run flats?
Buy a spare tire from bavauto of tischer. It will use most of your trunk, but for me it is worth it. Or you can buy the conticomfort kit from tire rack. N4S
Reply With Quote
  #21  
Old 05-24-2014, 11:25 AM
Pilgrim's Avatar
Pilgrim Pilgrim is offline
Car guy since 1968
Location: Fort Collins, CO
 
Join Date: Aug 2006
Posts: 1,478
Mein Auto: 2008 E91 328xi Sportwagon
Having different tires on the front and back is asking for handling problems, and worst case, having the car go out of control under hard (emergency) braking if one pair has significantly different traction than the others. Don't use run-flats on one axle and standard tires on the other. Just don't. There's no way to know whether it will work or be outright dangerous.
__________________
1983 Datsun 280ZX Turbo
2000 Jeep Grand Cherokee
2008 BMW E91 328xi Sportswagon
2009 BMW E92 328ix Coupe
Reply With Quote
  #22  
Old 06-04-2014, 08:25 AM
spankey spankey is offline
Officially Welcomed to the 'Fest
Location: PA
 
Join Date: Sep 2013
Posts: 272
Mein Auto: 335xi
I have RF's on the rear of my 335xi which are low tread and need to be replaced next month. I bought the car from a BMW dealer and at the time of purchase they had two new continental DWS's on the front.
Two different tires, both with different tread life also and put 20,000 miles on the car. No issues and handles great? I often wonder with the AWD systems if tread wear and such contributes to differential issues? Tire size such as running two totally different sizes front Nd fear would cause issues but I can't see tire wear doing that?
I mean if you replace all tires new, 6 months later slash a tire does that mean u need to replace all 4 tires? Man that would blow bigtime! That would def tell me to sell my AWD on the spot. Again just opinion here


Sent from BimmerApp mobile app
Reply With Quote
  #23  
Old 06-04-2014, 08:26 AM
spankey spankey is offline
Officially Welcomed to the 'Fest
Location: PA
 
Join Date: Sep 2013
Posts: 272
Mein Auto: 335xi
Sorry for the spelling. Dang phone!


Sent from BimmerApp mobile app
Reply With Quote
  #24  
Old 08-15-2014, 07:55 PM
cazzopazzo cazzopazzo is offline
Officially Welcomed to the 'Fest
 
Join Date: Mar 2014
Posts: 380
Mein Auto:
I have 4 17" rf conti .. $450 for all 4 3000 miles on it ..


Sent from BimmerApp mobile app
Reply With Quote
Reply

See More Related BMW Stories

Tags
run flat 335xi, run flat removal, run flats


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series & 4 Series > E90/E91/E92/E93 (2006 - 2013)
Today's Posts Search
Thread Tools
Display Modes

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 On



Forum Jump


All times are GMT -7. The time now is 12:58 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.