[BMWCSRegistry] OEM E3/E9 alloy wheels with tires, $250

[Bruce Leggett]

or this one, :-)
http://www.bmwcsregistry.org/Technical/e9_tire_alternatives.htm


----- Original Message ----
From: "simsanthony at comcast.net" <simsanthony at comcast.net>
To: gopostal <gopostal at seniorsix.org>; bmwcsregistry <bmwcsregistry at idb.ded.forest.net>
Sent: Wednesday, January 31, 2007 6:58:06 PM
Subject: Re: [BMWCSRegistry] OEM E3/E9 alloy wheels with tires, $250


Agreed, there are valid reasons to use staggered fitment, and a rear weight bias is certainly one of them.  I should have said "not exactly the ultimate in performance in the all ready nose-heavy e9."
 
Here's a handy calculator for comparing tire sizes.  It will let you make up tire sizes that don't exist, so it's best to use Tire Rack or the like for guidance.  
 
http://www.miata.net/garage/tirecalc.html
 
The original tires on the e3/e9 were the equivalent of 185/70-14's.  205/60-15's are quite a bit taller.  205/50-16 is a hair small but the speedo error is insignificant.  215/50-16 is also close.  The popular rear tire option, 225/50-16, is a bit large.  225/40-17 is close, but I can't find any tires in that size on Tire Rack.
 
Tony
-------------- Original message -------------- 
From: crcote at mindspring.com 

Tony, 
 
I accidentally hit "send" instead of "save as draft" when my phone rang, thanks for getting started on answering my questions. It seems to explain why my 911 has bigger rears from the factory (205's in front, 225's in the rear) -- they were trying to dial in more understeer, making it more difficult to swap ends when you get in trouble?
 
So, to continue, following the logic of "plus one" tire size upgrading (10mm more section width for every inch increase in rim size, I think?), this implies that 205/60/15, 215/50/16, and 225/40/17 are the sizes to use to keep the speedo calibration intact and the understeer/oversteer equation unchanged?
 
Thanks,
 
ChuckATL



-----Original Message----- 
From: simsanthony at comcast.net 
Sent: Jan 31, 2007 4:21 PM 
To: gopostal , bmwcsregistry 
Subject: Re: [BMWCSRegistry] OEM E3/E9 alloy wheels with tires, $250 


I think it's more about appearance than performance.  Staggered fitment is a recipe for amplifying understeer, not exactly the ultimate in performance.  The e9 has narrow front wheel wells and the rear track is narrower than the front, so staggered fitment lets you fill the rear wheel wells.  An e3 can handle 8" wheels all around with the correct offset.  having the same size tire on all four corners is most always the best bet for handling; you fine tune with springs, anti-roll bars and tire pressure.
 
Regards wheel damage on larger wheels with low profile tires -- I have 8x17" wheels (BBS wheels from an e39) with 235/45-17 tires on my e12.  Last week I had a brain fart and drove over a curb.  I killed two tires and bent the right front spindle, but both right side wheels came through straight and true.  Good quality wheels are strong, they don't bend easily.
 
Tony
 
-------------- Original message -------------- 
From: crcote at mindspring.com 

This reminds me of something I've been wondering about for a while -- why are the "staggered" 7 x 16 and 8 x 16 wheels considered by many to be the ultimate (performance) wheel combo for the E3/E9?
 
If one follows the "plus one" logic for increasing tire/rim size (10mm more section 



-----Original Message----- 
From: Art Wegweiser 
Sent: Jan 31, 2007 9:20 AM 
To: gparr02tii at earthlink.net, gopostal , bmwcsregistry 
Subject: [BMWCSRegistry] OEM E3/E9 alloy wheels with tires, $250 


Thanks for the info,
I can't get a real good look at the condition of the wheels nor the tread depth on the tires but it does seem to be a decent deal.  195 X 14 tires  are getting more and more rare as most every manufacturer is using scary skinny bicycle sidewall width tires that look like they would scrape the road on a rapid tight turn.
And smack a pothole and kiss off one of those $500+ rims.


Art


At 8:41 PM -0600 1/30/07, gparr02tii wrote:
This ad is in the SF Bay Craigslist, usual disclaimers apply.  Not mine, no affiliation
 
http://sfbay.craigslist.org/eby/pts/270330734.html
 
G-Man


-- 






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