Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E89 Z4 (2009 - current)

E89 Z4 (2009 - current)

Reply
 
Thread Tools Display Modes
  #26  
Old 08-25-2010, 06:52 PM
HerrK's Avatar
HerrK HerrK is offline
Officially Welcomed to the 'Fest
Location: CA
 
Join Date: Jan 2010
Posts: 588
Mein Auto: 2011 Z4 35i
Quote:
Originally Posted by lionfish View Post
When you guys say, RFT gives a harsh ride , What do you mean exactly? Harsh meaning, bumpy, stiff etc?
I think most peoples idea of a harsh ride is an abrupt feel in either the steering wheel or seat of the pants when crossing expansion joints, lane markers, pavement transitions that are perpendicular to the direction of travel , etc. The RFT sidewall is stiffer & shorter which give it the ability remain on the rim with little to no internal pressure. It is the nature of the design.
__________________


HerrK - Keine Eifelfahrt ohne eine Runde über den Nürburgring

May 2010 ED l 2011 35i l Crimson over Ext'd Coral Red w/brushed Alum l 6sp MT l Prem Sound l Sport Pack l 296's l Comfort Access l Alarm l Power Heated Seats l & Nav.
FrauK - 2014 Q5 TDI - May 2014 ED | Cuvée Silver over Pistachio beige | Premim Plus | MMI | Nav | B&O
Reply With Quote
  #27  
Old 08-25-2010, 11:49 PM
rafale's Avatar
rafale rafale is offline
Officially Welcomed to the 'Fest
Location: Portland, OR
 
Join Date: Oct 2005
Posts: 186
Mein Auto: 11 Z4 35is / 11 535Xi GT
I drove a loaner 328 with 16" RFTs. The RFTs work actually really great on higher profile tires (50 and above) since the sidewall is tall enough to make up for their stiffer characteristics. I think it is so bad only because our tires have a shorter sidewalls.
__________________
2000 Z3 2.8 TiAg (retired)
2002 330i Orient Blue (retired)
2005 330Ci TiAg (retired)
2009 Z4 30i Space Gray (retired)
2011 Z4 35is Space Gray
2011 535i GT xDrive Space Gray
Reply With Quote
  #28  
Old 09-14-2010, 03:22 PM
rafale's Avatar
rafale rafale is offline
Officially Welcomed to the 'Fest
Location: Portland, OR
 
Join Date: Oct 2005
Posts: 186
Mein Auto: 11 Z4 35is / 11 535Xi GT
alright, swapped my tires to PS2s that I bought a couple of months ago... what a difference does it make on my 18"... The ride is so much smoother. No more of this echoing bump sounds when I drive on road transitions. The low profile RFTs are just a bad idea. I also felt the difference carrying the PS2 and the RE50 RFT. You can definitely tell there is a huge weight difference. I am not going back that's for sure.
__________________
2000 Z3 2.8 TiAg (retired)
2002 330i Orient Blue (retired)
2005 330Ci TiAg (retired)
2009 Z4 30i Space Gray (retired)
2011 Z4 35is Space Gray
2011 535i GT xDrive Space Gray
Reply With Quote
  #29  
Old 09-15-2010, 07:06 PM
MJET MJET is offline
Registered User
Location: Ft. Lauderdale
 
Join Date: May 2005
Posts: 27
Mein Auto: Z4 & X5
Rft

LOL..... A harsh ride is my CaymanS Base Suspension on 19" non-RFT..... The ride on my wife's 18" RFT's is much smoother. If I change it will be because of the increased cost not the ride.........
Reply With Quote
  #30  
Old 09-16-2010, 03:55 AM
Rolf-Dieter's Avatar
Rolf-Dieter Rolf-Dieter is offline
Alter Peter
Location: North America
 
Join Date: Jul 2009
Posts: 533
Mein Auto: 2012 ///M3 LMB/Black
Quote:
Originally Posted by MJET View Post
LOL..... A harsh ride is my CaymanS Base Suspension on 19" non-RFT..... The ride on my wife's 18" RFT's is much smoother. If I change it will be because of the increased cost not the ride.........
__________________

Driving mt 2012 /// M3 LMB & Black Leather Interior Fully Loaded
I drove a Z4 35i across the USA in 2010 & loved it.
Somehow I just had to get back into the /// M3 and so I did.
Reply With Quote
  #31  
Old 10-13-2010, 08:59 PM
BugsBunny BugsBunny is offline
Registered User
Location: Dallas, TX
 
Join Date: Oct 2010
Posts: 4
Mein Auto: VW GTI
Sorry to ask 2 stupid questions -
One - is there a possible replacement for the RFT of the E89 Sport Package rear tire (255/30/19) to standard tire, same size ? Am asking b/c when I look on bridgestonetire.com and michelinman.com, I can not find a 255/30/19 tire in non-RF models (PS2, for instance).

Two - Alternatively, on a factory Sport suspension shipped with 19", is it possible to install 18" tires without modifying the suspension settings and not messing up later with alignment / camber, etc ?

Thanks for your help.

(I owned a Z4 2003 and I know the pain of the RFT - am looking at purchasing a E89 only if I can get rid of the 19" RFT. If possible I intend to re-use the very good Bridgestone 18' RE760 Sport from my VW GTI on the E89).
Reply With Quote
  #32  
Old 10-13-2010, 11:19 PM
marcw's Avatar
marcw marcw is offline
Officially Welcomed to the 'Fest
Location: Portland
 
Join Date: Jun 2008
Posts: 149
Mein Auto: 325i
1) yes, there are a number of regular summer tires that are available in a 255/30/19 Yokohama ADVAN Neova AD08, Goodyear Eagle F1 Asymmetric, Kumho Ecsta SPT to name a few. There is also no problem with upsizing. The car easily accommodates a 265 or 275. Some folks are even running 285 rears with the standard sport package adjustable m suspension.

2) yup, you can easily downsize to 18's if that's the route you want to go.

There are a few considerations about the 19's. Do yourself a favor and do a search on 19" wheels cracking. The style 296 wheels are cast wheels that in combination with the RFT are prone to cracking and bending. I know, because I bent 2 rims going over a pothole at 40 mph. I'm running regular tires now at 275/30/19. I'm hoping that the additional .24" sidewall height in combination with a softer sidewall will do a better job at protecting my rims.

Quote:
Originally Posted by BugsBunny View Post
Sorry to ask 2 stupid questions -
One - is there a possible replacement for the RFT of the E89 Sport Package rear tire (255/30/19) to standard tire, same size ? Am asking b/c when I look on bridgestonetire.com and michelinman.com, I can not find a 255/30/19 tire in non-RF models (PS2, for instance).

Two - Alternatively, on a factory Sport suspension shipped with 19", is it possible to install 18" tires without modifying the suspension settings and not messing up later with alignment / camber, etc ?

Thanks for your help.

(I owned a Z4 2003 and I know the pain of the RFT - am looking at purchasing a E89 only if I can get rid of the 19" RFT. If possible I intend to re-use the very good Bridgestone 18' RE760 Sport from my VW GTI on the E89).
__________________

2010 sDrive35i Sapphire black, beige leather, premium, sport, 19" wheels, premium sound, nav, cold, comfort access, alarm, smartphone, 6 speed manual
2006 530xiT Wagon, Monaco Blue/black, premium, cold, PDC, Logic 7, Comfort Access, rear shades

BMW CCA Member# 164977
Reply With Quote
  #33  
Old 10-26-2010, 11:48 AM
Rolf-Dieter's Avatar
Rolf-Dieter Rolf-Dieter is offline
Alter Peter
Location: North America
 
Join Date: Jul 2009
Posts: 533
Mein Auto: 2012 ///M3 LMB/Black
Update .... Interesting read

http://www.e90post.com/forums/showth...=1#post8225396
__________________

Driving mt 2012 /// M3 LMB & Black Leather Interior Fully Loaded
I drove a Z4 35i across the USA in 2010 & loved it.
Somehow I just had to get back into the /// M3 and so I did.
Reply With Quote
  #34  
Old 10-26-2010, 07:45 PM
BimmerKat BimmerKat is offline
Quick! To the Katmobile!
Location: ATL
 
Join Date: Apr 2007
Posts: 88
Mein Auto: 2009 Z4 35
I'm ditching my RFTs now that I've worn them out at 8k miles. My fronts were pretty scrubbed on an edge from autocross but thought I could get some more use out of them. I went in for an alignment and realized my rears had major inner wear. You can't get a lot of camber out of the Z4 without major mods but the tweaks done should protect my rears from this level of damage so early.

I wish I had gotten an alignment immediately after I got the car a year ago, like I did with my previous gen Z4. I'm not that hard on my car on the street and it was only 8K miles and three autoxs.

My next set is either going to be the Yoko Advan AD08 or Bridgestone RE-11 in a couple of weeks. I'm in the south and my lease is up in a year in a half and I know I'll have to put RFTs back on it to turn it in. Either tire should hold up for an autoX season and a track day or so and give me a good combo of street ride and autox grip. I considered a separate set of track wheels but I didn't want to make my husband do all that work (he changes wheels for events already).
__________________
2012 135i M-sport convertible - Euro Delivery 6/27/12
2009 Z4 sdrive35i Space Grey/Coral Red - gone!
Premium/Sport/19"/DCT/Heated Seats/iPod/Satellite
Reply With Quote
  #35  
Old 10-04-2012, 07:46 AM
brinerh brinerh is offline
Hilton
Location: Durban RSA
 
Join Date: Nov 2011
Posts: 3
Mein Auto: E89 Z4
RFT 19inch changed to normal tyre

I changed my 19 inch Bridgestone Potenza RFT's to conti Sport contact 5p's (non runflat). Made huge difirence to smoother ride and road noise. Also got a mobility kit from dealer which is an electric pump that runs off gig lighter connection. Comes with pucture sealantt in case of emergencies.

Difficult to get this size in other makes of tyre. (255/30's and 225/35's). I hear new Bridgestone S001 non runflat is quiet. I have Michelin Pilot 3's on my 5 series and they are the best in my opinion. (couldnt get the right size for the Z other wise i would have gone Michelin.). So far very happy with Conti's.

Still want to to do more sound insulation in wheel wells and door wells. I will use a combination of foam and Dynamat.
Reply With Quote
  #36  
Old 10-05-2012, 09:16 AM
alexfurm7 alexfurm7 is offline
Registered User
Location: New York
 
Join Date: Oct 2012
Posts: 3
Mein Auto: Z4
Angry Runflats can't be fixed - my experience

Run flats are a pain because it's hard finding a tire shop who will patch a hole if you run over a nail. Apparently BMW (and the tire manufacturer) prohibits these tires from being patched . So if you have even a tiny hole, you have to buy an entirely new tire (or a pair to keep the car balanced).

Check out my car's profile at: http://autop.in/alex (Is your car worthy of it's own URL?)
Reply With Quote
  #37  
Old 10-06-2012, 10:09 AM
rmorin49's Avatar
rmorin49 rmorin49 is online now
Officially Welcomed to the 'Fest
Location: Hagerstown, MD,
 
Join Date: Jan 2007
Posts: 4,052
Mein Auto: 2011 335d
Quote:
Originally Posted by alexfurm7 View Post
Run flats are a pain because it's hard finding a tire shop who will patch a hole if you run over a nail. Apparently BMW (and the tire manufacturer) prohibits these tires from being patched . So if you have even a tiny hole, you have to buy an entirely new tire (or a pair to keep the car balanced).

Check out my car's profile at: http://autop.in/alex (Is your car worthy of it's own URL?)
Not my experience: I picked up a nail in the tread area of my RF tire on my 335d. Took it to the local Continental dealer, I have Contis, they removed the tire from the wheel, removed the nail, patched and plugged the hole. I have been driving now for over 6 months with no issues.
__________________

Colonel (Ret) US Army / Hagerstown, MD
1985 M635 Euro Alpine White/Pacific Blue (Fun Car)
2010 Z4 s30i Alpine White/Beige
(Road Trip Car)

2013 Audi A6 Ibis White/Nougat (Daily Driver)
2013 Audi A4(Ret)
2011 335d (Ret)
2009 335i vert (Ret)
2007 335i vert (Ret) ED 04-13-10
2000 740iL (Ret)
1998 328iC (Ret)
1990 535i (Ret)
1988 635CSi (Ret)
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E89 Z4 (2009 - current)
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 Off



Forum Jump


All times are GMT -7. The time now is 03:17 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms