Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E70) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #31  
Old 08-18-2011, 12:22 AM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 6,730
ard is on a distinguished road
Quote:
Originally Posted by motordavid View Post
Meanwhile, back at the Bald Tire Ranch, we've had a few pages of which tire is great/sucks and why, but the OP has wandered off into a fugue state,
with no update. ...

I suspected as much, with the posting history...
Get the sumbitch diagnosed and fixed.
Hmmm.

Quote:
Originally Posted by ABMW View Post
I don't have the exact alignment numbers. My dealer wanted $255.00 to give those numbers to me (nice guys- given I've had the car for less than 11 of the 12 months I've owned it) There front and rear appear to be toed-in to a visible degree. Camber appears to be 0-degrees, but that's using my naked eye, and means nothing, as the car would probably need to be unsprung for me to see anything amiss. .
IMHO OPs wheels are not properly aligned- they may be in the ballpark that BMW says is "in range" (ie 0.00 to 0.08 toe, each side); but that range will allow 5k to 25k miles from any given tire!!!

Cross toe of 0.16" is fine with BMW and you will get 5k miles. Cross toe set at 0.01-0.02 and you get 25k miles.

And you are visually estimating toe and camber?!?!

Why so complicated? Adaptive drive, etc, etc. Like asking to diagnose a patient yet refusing to have a blood test. Take it to any alignment store for a $99 alignment- BMW is absolute BS for alignments.

Finally, tell the BMW SA you'll pay for the alignment check only if they are within certain limits- so he needs to put his money where his mouth is. (And how could you initially post the alignment is spot on?)

Last edited by ard; 08-18-2011 at 12:58 AM.
Reply With Quote

Sponsored Links

  #32  
Old 08-18-2011, 07:12 AM
rh71's Avatar
Member
 
Join Date: May 2007
Location: LI | NY
Posts: 3,924
rh71 is on a distinguished road
Quote:
Originally Posted by soldmystang View Post
any non-RFT is going to grip and ride better than a RFT tire IMO.
... which is why I don't get all this argument for why summer tires are the only way to go on a "truck" like this. You can say BMW R&D spent all this time and effort to make the most optimally performing car, but then they gave it "inferior" RFTs for our convenience. Shouldn't they have gone summer non-RFT for the 20" wheel upgrade package if that was their intention?
__________________
'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr
Reply With Quote
  #33  
Old 08-18-2011, 09:58 AM
BGM's Avatar
BGM BGM is offline
Member
 
Join Date: Jul 2007
Location: Chicago, IL
Posts: 1,830
BGM is on a distinguished road
Quote:
Originally Posted by rh71 View Post
... which is why I don't get all this argument for why summer tires are the only way to go on a "truck" like this. You can say BMW R&D spent all this time and effort to make the most optimally performing car, but then they gave it "inferior" RFTs for our convenience. Shouldn't they have gone summer non-RFT for the 20" wheel upgrade package if that was their intention?
Because with the e70 along came the option of 3rd row seating (with no spare). Couple that with BMW going RFT on I believe almost all of their models with Sport Packages. As most know BMW has gone with RFTs as it believes safety is just as important as performance.
__________________
2008 X5 4.8
Jet Black/Black Nevada/Dark Burl Walnut
Adaptive Drive
Premium Pack
Tech Pack
Climate Pack
Sport Pack
20" Wheel Option
Premium Sound
Sirius Satellite
Rear DVD Entertainment
Multi-Contour Seats
Comfort Access
3rd Row Seat
Heated Front Seats
Running Boards
3M VentureShield Paint Protection Film
Reply With Quote
  #34  
Old 08-18-2011, 01:18 PM
JCL's Avatar
JCL JCL is offline
Premier Member
 
Join Date: Mar 2005
Location: Vancouver, Canada
Posts: 11,853
JCL will become famous soon enoughJCL will become famous soon enough
Quote:
Originally Posted by rh71 View Post
... which is why I don't get all this argument for why summer tires are the only way to go on a "truck" like this. You can say BMW R&D spent all this time and effort to make the most optimally performing car, but then they gave it "inferior" RFTs for our convenience. Shouldn't they have gone summer non-RFT for the 20" wheel upgrade package if that was their intention?
You are lumping two very separate issues together. Yes, the RFT can ride more harshly. But it doesn't necessarily have lower grip, that is a function of things other than the run flat feature of the design. RFTs can just as easily have more grip. RFTs are claimed to have better turn-in (due to the stiffer side wall) which will improve performance in transients.

All design involves trade offs. Handling, noise, harshness, cost/mile, manufacturing cost, owner convenience, safety, etc. BMW engineers just found their own best balance across those items with RFTs, not necessarily the best in any one category.

Biggest reasons for run flats are packaging, convenience, and safety. Cost is actually higher, partly due to the need for a tire monitoring system. Packaging is obvious. Convenience: how many owners change their own flat tires any more? Now they don't have to. Safety relates to blow outs at speed. Not a common occurence these days IMO, but BMW can point out that the car will be more likely to stay in the lane. Most drivers of modern BMWs are not performance drivers, IMO. And as someone who does tend to critically evaluate my own tires, from the performance viewpoint, I didn't mind my run flats at all.

I predict that one day before too long, all tires will be run flats, just as it is very difficult to find non-radials these day. When radials first came out some didn't like them, as when they broke loose, they were less predictable, and less progressive. They gripped more, to a higher limit, and then let go more abruptly. We all got used to it. Look for the day when jacks and lug wrenches will be in the museum with the spark-advance cables and distributor caps.
__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver

2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
Reply With Quote
  #35  
Old 08-18-2011, 03:40 PM
Member
 
Join Date: Dec 2010
Location: Los Angeles, CA
Posts: 146
Alan Smithee is on a distinguished road
Quote:
Originally Posted by rh71 View Post
You can say BMW R&D spent all this time and effort to make the most optimally performing car, but then they gave it "inferior" RFTs for our convenience. Shouldn't they have gone summer non-RFT for the 20" wheel upgrade package if that was their intention?
To further JCL's point, the Corvette ZR1 has run-flats, and it is not at a loss for performance.
Reply With Quote
  #36  
Old 08-18-2011, 06:46 PM
soldmystang's Avatar
Member
 
Join Date: Nov 2007
Location: North Carolina
Posts: 675
soldmystang is on a distinguished road
Quote:
Originally Posted by Alan Smithee View Post
To further JCL's point, the Corvette ZR1 has run-flats, and it is not at a loss for performance.
i'd be willing to bet that those folks that actually take their ZR1s to the track don't do it on RFTs.

RFTs on a ZR1 are perfect for the waxer crowd. which last time i checked is about 90%.
Reply With Quote
  #37  
Old 08-18-2011, 08:09 PM
motordavid's Avatar
RetiredBum & Semi-RenaissanceMan
 
Join Date: Mar 2005
Location: Mtns of Western NC, & SW FLA
Posts: 16,816
motordavid will become famous soon enoughmotordavid will become famous soon enough
Way OT...but so is the thread, and the MIA OP.

Our '02 Vette came with the normal RFTs, as do all Corvettes of recent vintage, and also any car that does not literally the 'room' for a spare, or in the interior pkging, the space. Add in the Biffy & Buff factor, and I agree with JCL that any car one buys near the end of this decade will have RFTs. It is the way of the future, tire-wise for some good reasons, and some 'mkting'/bs not so good reasons, imo.

The Vette ran fine with the oe GY RFTs, and handled well with the Z51 suspension, though it is no Z06, but runs around these Mtn roads like a go cart. The oe RFTs lasted ~30k miles, though they were very noisy at the end.

I replaced them with the foo foo GY Eagle SuperCar F1s, non RFT, and these tires are ok.
Stick like glue, though turn in was decidedly 'different' when new/newish.

20k miles later, hauling our azzes around the country on a 13k mile road trip, I came to like and trust them, though at their current mileage, there is not huge tread left...and, I do Zaino my Vette 3-4 times a year, but I guess that puts me in the garage queen slot.

As for running non-RFTs, I was seldom worried; I had a plug kit and compressor in trunk, and a cell phone and a couple big CCs...and, currently, getting a largeish RFT of any size/brand replaced, at the local tar joint, in much of North America, may be a 2 day wait. But, it's 'progress', and it is the way tire apps are going.

Do I run it on a track? No...the track runners of any brand, are a handful, and gluttons for annual new brake pads/rotors and that catchy new set of track tars.

Losing my point, other than this thread is typical of what the OP starts, and seldom if ever finishes: no further responses/follow-up, or resolve.

Meanwhile, a half a dozen of us are posting on which tire does the 'best' on cloudy days in some situ...

RFTs are here to stay. I will try and replace my 3 cars sets with non-RFTs, 'next time' again, if I can. Either way does not really bother me, though I would have a slighty higher level of comfort with RFTs back on the Vette. But, no biggie either way.

Could not care less about his/the OP's situ, at this point...
GL, mD
__________________
Ol'UncleMotor
From the Home Base of Pro Bono Punditry
and 50 Cent Opins...

Our Mtn Scenes, Car Pics, and Road Trip Pics on Flickr:
http://www.flickr.com/photos/4527537...7627297418250/
http://www.flickr.com/photos/4527537...7627332480833/

http://www.flickr.com/photos/45275375@N00/

My X Page





Last edited by motordavid; 08-18-2011 at 08:33 PM.
Reply With Quote
  #38  
Old 08-18-2011, 09:49 PM
soldmystang's Avatar
Member
 
Join Date: Nov 2007
Location: North Carolina
Posts: 675
soldmystang is on a distinguished road
try Michelin PS2s next time on the Plastic Fantastic MD. much better wet traction.
Reply With Quote
  #39  
Old 08-19-2011, 08:32 AM
motordavid's Avatar
RetiredBum & Semi-RenaissanceMan
 
Join Date: Mar 2005
Location: Mtns of Western NC, & SW FLA
Posts: 16,816
motordavid will become famous soon enoughmotordavid will become famous soon enough
Quote:
Originally Posted by soldmystang View Post
try Michelin PS2s next time on the Plastic Fantastic MD. much better wet traction.
Yes, Stang...they are on my short list. Maybe next year, depending how these GYs hold up. The long drive is over. Idly thinking of going up a wheel size, from 17s/18s to 18s/19s like the C6s. I can dream up stuff to spend dough on easily...but this retired bum fixed/eroding income deal thwarts many plans.
GL, mD
Reply With Quote
  #40  
Old 08-19-2011, 12:40 PM
Member
 
Join Date: May 2005
Location: South Florida
Posts: 328
TahoeM3 is on a distinguished road
I am running Toyo Proxes STs on my X5M and they are much better than the stock Bridgestone runflats. The lighter weight is noticeable. I ran these same tires on my previous 4.8 when I lived in Reno/Tahoe, where I used them year-round (to many ski trips and through many snow/blizzard days) and then in Florida. I got a total of around 35,000 miles on the last set and I'm not gentle on them by any stretch of the imagination...throwing the 4.8 around corners and through off ramps.

The first day I had them on the M, which had just over 1200 miles on it at the time, I ran a VBox measured 0-60 in 4.5 and 1/4 in 12.9@108 without launch control...in the rain.
__________________
2017 Nissan GTR Red/black - Tune/midpipe
2013 BMW X5 50i M-sport Alpine white/black - Dinan stage 1
2016 Jaguar F-Type R Gray/red
Reply With Quote
Reply

Bookmarks

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 05:48 AM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.