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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 06-05-2013, 03:50 PM
DANSZ3 DANSZ3 is offline
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Location: South East
 
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Mein Auto: 01 Z3, 06 997, 06 X5
Wider rear tires?

New to me Z3 (01 2.5/5) needs 2 tires, I'm thinking to put wider...chunkier looking...tires on the rear only, fronts are standard 225/50x16...problem? What width for o/e wheel?
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  #2  
Old 06-05-2013, 09:24 PM
jafxdwg jafxdwg is offline
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Location: Whitby Ontario Canada
 
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Mein Auto: 2008 Z4 si
Go to Tire Rack web site. You can check out their options and get great advice. I recommend Rudy cause he really knew my car and gave great advice.
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  #3  
Old 06-08-2013, 08:20 AM
tohbi tohbi is offline
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Mein Auto: z3 '97 atlanta blue 2.8
my opinion: the car looks like it was designed for a staggered setup but a square setup allows for better tire wear because one can rotate the tires.

wider tires will soften the ride a bit but may wear even worse than usual on the inside. because you can't rotate, the cost should be considered.

i told the guys at discount tires i'm going to ask them to switch tires on the rear wheels when the inside wears down. also, i'm running 38 lbs of air in the rear to try moving the wear spot inward and to liven up the rear end on a car that pushes in the turns.
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  #4  
Old 06-11-2013, 04:01 PM
DANSZ3 DANSZ3 is offline
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Mein Auto: 01 Z3, 06 997, 06 X5
No one has put bigger tires than 225/50x16's on the rear?
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  #5  
Old 06-12-2013, 08:04 AM
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amancuso amancuso is offline
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Quote:
Originally Posted by DANSZ3 View Post
No one has put bigger tires than 225/50x16's on the rear?
I have 225/45/17 and 245/40/17 in the rear.

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  #6  
Old 06-12-2013, 08:39 AM
tohbi tohbi is offline
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Mein Auto: z3 '97 atlanta blue 2.8
probably, list members are wondering what the point is?

depending on how much power you have, wider tires may hamper performance more than improve it. my 2.8 is "overtired" in the rear with the staggered setup but staggered with larger wheels looks better. i've considered going square with 17" wheels and 235s all around. maybe next time i have to spring for rear tires i'll do that.

there's plenty of room back there for wider tires. not sure the maximum you can go but try searching the forum for that. if appearance is your motive, just do what you think looks best.

Last edited by tohbi; 06-12-2013 at 07:13 PM.
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  #7  
Old 06-12-2013, 05:16 PM
DANSZ3 DANSZ3 is offline
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WHAT SIZE 16" have you put on your 01 2.5 standard wheels
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  #8  
Old 06-13-2013, 01:31 PM
Phinius Phinius is offline
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Mein Auto: 2000 Z3 2.8L
Rotating tires is a no no

You don't rotate Z3 tires regardless of what tire choice you end up making because the set-up/camber of the front and rear is different and you'll adversely effect handling and saftey.
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  #9  
Old 06-13-2013, 03:14 PM
nfunk nfunk is offline
1998 BMW Z3 2.8L
Location: New Orleans
 
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I have 225/50 directional tires on front and back of my Z3 2.8L roadster. I rotate tires keeping them on the same side (front to back, back to front) and I haven't noticed any change in stability or handling. I have never heard this problem of rotating tires, can you cite your source of information?
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  #10  
Old 06-13-2013, 08:38 PM
DANSZ3 DANSZ3 is offline
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Quote:
Originally Posted by nfunk View Post
I have 225/50 directional tires on front and back of my Z3 2.8L roadster. I rotate tires keeping them on the same side (front to back, back to front) and I haven't noticed any change in stability or handling. I have never heard this problem of rotating tires, can you cite your source of information?
Not answering my question,
I don't rotate because I don't want to replace 4 tires at one time...
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  #11  
Old 06-14-2013, 04:24 AM
nfunk nfunk is offline
1998 BMW Z3 2.8L
Location: New Orleans
 
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Quote:
Originally Posted by DANSZ3 View Post
Not answering my question,
I don't rotate because I don't want to replace 4 tires at one time...
Since you don't rotate, which tires do you find wear the quickest?
I rotate so that I get the best tire life and even tread wear.

Nick
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  #12  
Old 06-14-2013, 04:32 AM
DANSZ3 DANSZ3 is offline
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I think the rears wore quicker on my 96, but the 01 needs front tires, so I was thinking to put the good rears on the front and go to 245/50 or 255/50 for the rear BUT that will change the revolutions per mile from about 835 to 798 (for the 255's) so, what will that do to speedo reading and to the rear ratio..??
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  #13  
Old 06-14-2013, 07:05 AM
tohbi tohbi is offline
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Mein Auto: z3 '97 atlanta blue 2.8
Quote:
Originally Posted by DANSZ3 View Post
Not answering my question,
I don't rotate because I don't want to replace 4 tires at one time...
now there is a rational i never expected to read.

out here in the howling desert we have long straight roads, wearing the inside rear tires extraordinarily. i hit the turns hard, evening the wear a bit but, still, the inside rear goes so quickly that the expense of replacement is considerable.

should we be looking to replace rear springs at a certain point or can an adjustment bring the wear spot closer to center?
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  #14  
Old 06-14-2013, 11:01 AM
Phinius Phinius is offline
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Mein Auto: 2000 Z3 2.8L
Tire Rotation

Sorry if my reply was off topic but I thought you were interested is possible problems using different tires sizes front rear. Page 113 of the manual discourages rotating tires front to rear generally and states that you should not rotate front to rear at all if the tires sizes are different.

Last edited by Phinius; 06-14-2013 at 11:03 AM.
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  #15  
Old 06-17-2013, 07:34 AM
crappyattitude1 crappyattitude1 is offline
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Location: Crappyville, TN
 
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Mein Auto: '99 ////M Roadster
Tohbi....

Do you not have your tires dis-mounted and swapped sides? I do this on my ////M. Tires still traveling in correct direction, just wearing the other side of the tire.

Crappy : )

(Just outside of Nashville)
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  #16  
Old 06-17-2013, 09:18 AM
Phinius Phinius is offline
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Mein Auto: 2000 Z3 2.8L
Just quoting the manual. Swapping sides would seem to increase tire life, but decrease the actual amount of tread on the ground thus decreasing road grip.
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  #17  
Old 06-18-2013, 11:46 AM
tohbi tohbi is offline
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yes, crappy, that's what i intend doing from now on. i don't think discount tires will charge me for doing that; they've been great so far. good knowing it's working for you.

not sure what the following means?
Quote:
Originally Posted by Phinius View Post
Just quoting the manual. Swapping sides would seem to increase tire life, but decrease the actual amount of tread on the ground thus decreasing road grip.
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  #18  
Old 06-19-2013, 03:16 PM
wilem wilem is offline
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Location: south carolina
 
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you can rotate if the tires are the same size. if they are not directional tires you can swap sides without dis-mounting them. some have an "outside" marked on them so that limits that. some wheels are directional also. I JUST bought a set of tires and they are not directional nor are they side out specific. so now because all tires and wheels are the same (yes staggered looks better) they can be rotated as rim tire assemblies. alignment specs have zero to do with rotation as that is a fixed to that spot ordeal. Now if the tires are staggered obviously you are limited to swapping sides, which will help with cupping but that is about it.
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Last edited by wilem; 06-20-2013 at 07:46 PM.
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  #19  
Old 06-19-2013, 03:18 PM
wilem wilem is offline
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Location: south carolina
 
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Quote:
Originally Posted by tohbi View Post
yes, crappy, that's what i intend doing from now on. i don't think discount tires will charge me for doing that; they've been great so far. good knowing it's working for you.

not sure what the following means?
yeah, when they sell the free rotation for life it costs them not you.. if they dont catch it at the sale.

Now, outside to mount and balance my new rims and tires..;-)
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  #20  
Old 06-19-2013, 10:24 PM
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Bucko521 Bucko521 is offline
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Mein Auto: 2006 Z4, 2001 Z3
Quote:
Originally Posted by amancuso View Post
I have 225/45/17 and 245/40/17 in the rear.

http://smg.photobucket.com/user/aman...2f70a.jpg.html
The car looks great Al
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Last edited by Bucko521; 06-19-2013 at 10:25 PM.
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  #21  
Old 06-20-2013, 04:25 AM
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amancuso amancuso is offline
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Quote:
Originally Posted by Bucko521 View Post
The car looks great Al
Thank you.
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  #22  
Old 06-20-2013, 05:06 AM
crappyattitude1 crappyattitude1 is offline
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Location: Crappyville, TN
 
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Mein Auto: '99 ////M Roadster
Tohbi....

Discount Tire tried to charge me $20 to dis-mount the rear tires and re-mount and balance them. I told the fella to look at what I spent on the Michelin Pilot Sport A/S +'s..... along with the other two vehicles and the two trailers I had bought tires for in the recent years... all from Discount... He asked when I wanted to come in for free.....

Crappy

(Just outside of Nashville)

Last edited by crappyattitude1; 06-20-2013 at 05:09 AM.
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