Tirerack
Use the following links to go directly to useful tirerack winter items: Tirerack Winter Tires. Gary's Winter Tire FAQ.
Using the links directly supports E90Post with tirerack sales commision!

  E90Post
 


TireRack

   PLEASE HELP SUPPORT E90POST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Running RFT on front and Non RTF on back



Wheels and Tires forum Sponsored by The Tire Rack
Please help to directly support e90post by doing your tirerack shopping from the above link. For every sale made through the link, e90post gets sponsor support to keep the site alive. Disclaimer

Wheel offset calculator courtesy of BimmerPost.com. You may use this calculator to calculate what tire sizes you might need if you upgrade your tires, or what wheel sizes/offsets are compatible with your car.
    Current Wheel Width  inches             Current Wheel Offset  mm.
         New Wheel Width  inches                  New Wheel Offset  mm.
 
TIRE WIDTH
/
ASPECT RATIO
- WHEEL DIAMETER
ORIGINAL TIRES
/
NEW TIRES
/
Based on your stock wheel setup, your new wheel will have:
Original Tires Diameter (in.)
      New Tires Diameter (in.)
  Difference in diameter (in.)
           Percent Difference %
                     
Speedo @60mph will read: mph
Collapse/Expand the BimmerPost Wheel and Tire calculator
Reply
 
Thread Tools Search this Thread
      07-11-2012, 12:55 PM   #1
Romanian nightmare
Second Lieutenant
 
Romanian nightmare's Avatar
 
Drives: 2007 335i M-pack
Join Date: Jan 2011
Location: South

Posts: 236
iTrader: (0)

Running RFT on front and Non RTF on back

As the title says....

This is not by choice, but by necessity (at least for now). So my questions to the experts out there are:

1) What do you think?
2) Is it safe?
3) Can this do any damage to the car?

Many thanks in advance for any input....

Oh, and try to keep most of the smart ass comments to yourselves if possible...if not....well, let me have them
Romanian nightmare is offline   United_States
0
Reply With Quote
      07-11-2012, 01:16 PM   #2
VMRWheels
BimmerPost Supporting Vendor

 
VMRWheels's Avatar
 
Drives: BMW
Join Date: Jun 2007
Location: Anaheim, CA

Posts: 13,493
iTrader: (4)

Garage List
2014 BMW F22  [0.00]
2013 BMW F06  [0.00]
2013 BMW F30  [0.00]
I wouldn't recommend doing so. Car won't handle optimally and it'll feel unstable. Fronts will feel stiff while rears will feel mushy. I would try my best do avoid it but to answer your question, it won't cause any damage to the car.
__________________

VMR | Wheels - Mitch A. | p. 714-442-7916 extension 107 | e. Mitch@velocitymotoring.com | ** VMR Winter Wheel/Tire Sale! **
VMRWheels is offline  
0
Reply With Quote
      07-11-2012, 02:07 PM   #3
Romanian nightmare
Second Lieutenant
 
Romanian nightmare's Avatar
 
Drives: 2007 335i M-pack
Join Date: Jan 2011
Location: South

Posts: 236
iTrader: (0)

Thanks for the honest opinion. I also have the car in the local BMW shop to see if there is anything wrong. The car does vibrate more once i hit 80-90 mph....

Curious to see what they say.....will keep you posted.
Romanian nightmare is offline   United_States
0
Reply With Quote
      07-11-2012, 03:18 PM   #4
VMRWheels
BimmerPost Supporting Vendor

 
VMRWheels's Avatar
 
Drives: BMW
Join Date: Jun 2007
Location: Anaheim, CA

Posts: 13,493
iTrader: (4)

Garage List
2014 BMW F22  [0.00]
2013 BMW F06  [0.00]
2013 BMW F30  [0.00]
Quote:
Originally Posted by Romanian nightmare View Post
Thanks for the honest opinion. I also have the car in the local BMW shop to see if there is anything wrong. The car does vibrate more once i hit 80-90 mph....

Curious to see what they say.....will keep you posted.
Vibration is most likely not because the mix of non-rft and rft. It's most likely a balancing issue.
__________________

VMR | Wheels - Mitch A. | p. 714-442-7916 extension 107 | e. Mitch@velocitymotoring.com | ** VMR Winter Wheel/Tire Sale! **
VMRWheels is offline  
0
Reply With Quote
      07-11-2012, 03:25 PM   #5
Malbolge
Major General
 
Malbolge's Avatar
 
Drives: TiAg Z4 Coupe 3.0Si
Join Date: Sep 2007
Location: EE

Posts: 5,229
iTrader: (1)

Garage List
I think better mismatched brands front and back than mismatched RFT and non RFT.
__________________
'07 TiAg BMW Z4 Coupe 3.0si / Everything
Malbolge is offline   Estonia
0
Reply With Quote
      07-11-2012, 04:10 PM   #6
SilverII
Colonel
 
Drives: '11 335IS
Join Date: Jun 2010
Location: DFW

Posts: 2,336
iTrader: (0)

Garage List
2011 BMW 335IS  [4.83]
i have the same thing on my car. It gets unpredictable at higher speeds. I do low speed city driving so it is not bad. Not something you want to do if you want peak performance.
SilverII is offline   United_States
0
Reply With Quote
      07-11-2012, 04:11 PM   #7
chromisdesigns
Lieutenant Colonel
 
Drives: 2008 BMW 335i sedan
Join Date: Jan 2010
Location: San Francisco

Posts: 1,754
iTrader: (0)

Quote:
Originally Posted by SilverII View Post
i have the same thing on my car. It gets unpredictable at higher speeds. I do low speed city driving so it is not bad. Not something you want to do if you want peak performance.
+1 -- Can it damage your car? Well, sure, if you lose control at speed, it's likely to!
chromisdesigns is offline  
0
Reply With Quote
      07-11-2012, 04:19 PM   #8
SilverII
Colonel
 
Drives: '11 335IS
Join Date: Jun 2010
Location: DFW

Posts: 2,336
iTrader: (0)

Garage List
2011 BMW 335IS  [4.83]
Quote:
Originally Posted by chromisdesigns View Post
+1 -- Can it damage your car? Well, sure, if you lose control at speed, it's likely to!
No damage to the car.... unless you run it into things.

The reason i did it is to finish up the RFT on the front and go +1 on Non-RFT.
SilverII is offline   United_States
0
Reply With Quote
      07-11-2012, 04:31 PM   #9
Romanian nightmare
Second Lieutenant
 
Romanian nightmare's Avatar
 
Drives: 2007 335i M-pack
Join Date: Jan 2011
Location: South

Posts: 236
iTrader: (0)

The reason i did it is to finish up the RFT on the front and go +1 on Non-RFT.[/quote]

Same reason here. Trying to save my money for other fun things....
Romanian nightmare is offline   United_States
0
Reply With Quote
      07-12-2012, 10:38 AM   #10
Gary@TireRack
Moderator
 
Gary@TireRack's Avatar
 
Drives: Formerly 1995 M3
Join Date: Oct 2006
Location: South Bend, IN, Tire Rack HQ

Posts: 4,408
iTrader: (2)

Quote:
Originally Posted by Romanian nightmare View Post
As the title says....

This is not by choice, but by necessity (at least for now). So my questions to the experts out there are:

1) What do you think?
2) Is it safe?
3) Can this do any damage to the car?

Many thanks in advance for any input....

Oh, and try to keep most of the smart ass comments to yourselves if possible...if not....well, let me have them
Like the others have said...

1) I think it is not a good plan
2) No, as it causes unstable handling
3) Not directly...but when you lose control of the car it will.
__________________
Gary
Tire and Wheel Forum Moderator. Tire Rack Sales Rep
Gary@Tirerack.com
http://www.tirerack.com/a.jsp?a=AH8&url=index.jsp

Please refer to 'Gary' as your previous contact when you order online.
Gary@TireRack is offline   United_States
0
Reply With Quote
      07-12-2012, 11:22 AM   #11
Romanian nightmare
Second Lieutenant
 
Romanian nightmare's Avatar
 
Drives: 2007 335i M-pack
Join Date: Jan 2011
Location: South

Posts: 236
iTrader: (0)

So my local BMW shop said that I need to change the thrust arm bushings as well since they "may" also contribute to the shaking. What do you guys think?

As for the tires, the dealership said that they did not find anything wrong. They balanced all 4 tires again, just to make sure and the shaking is almost gone.

Thanks to all for your posts and while we all agree it's not the best combination, I'll just have to be extra careful.

Happy driving everyone!!!
Romanian nightmare is offline   United_States
0
Reply With Quote
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
Forum Jump


All times are GMT -5. The time now is 11:12 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
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