BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Track / Autocross / Dragstrip / Driving Techniques
 
Race Precision Motorsport
Post Reply
 
Thread Tools Search this Thread
      10-25-2012, 10:13 PM   #1
Xcelrrate
Driver
 
Xcelrrate's Avatar
 
Drives: E90 ///M3
Join Date: Sep 2010
Location: Las Vegas, NV

Posts: 350
iTrader: (3)

Garage List
2008 BMW E90 M3  [5.00]
Quick question on acceptable minimum tread depth?

I am about to be in the market to be getting me some new Michelin PSS tires all around. I don't know how much thread I currently have left on my PS2's, but I haven't reached my wear bars yet!

I am planning/ wanting to track my car this Sunday @ Chuckwalla.

I figured what a perfect time and place to finish and burn off my tires before slapping on the new PSS's

So as the title says, what is the minimum acceptable tread depth? I will be traveling from Las Vegas to Chuckwalla which is a 225 miles away.

I am anticipating to finish off my tires, but just wanted to budget enough rubber to get me back home, another 225 miles...

Weather looks good, so I should be able to drive home on Track-Made-Slicks right? LoL
__________________

'08 Jerez Black E90 ///M3
Pics of my Ride
Xcelrrate is offline   United_States
0
Reply With Quote
      10-25-2012, 10:21 PM   #2
sleepless
Private First Class
 
sleepless's Avatar
 
Drives: 11 E90 M3
Join Date: Jan 2008
Location: Redmond, WA

Posts: 116
iTrader: (0)

If it isn't raining, slicks are perfectly fine for the drive back
__________________
'11 E90, Cantrell brake ducts, Apex 18x10 ARC-8, 265/35 PSS, RS19 pads, -2.2 camber, CMS Lap Timer Pro
sleepless is offline   United_States
0
Reply With Quote
      10-26-2012, 01:00 AM   #3
OC3
Havin' a blast!
 
OC3's Avatar
 
Drives: 2013 M3 E92 Jerez Blk DCT ZCP
Join Date: Nov 2010
Location: SoCal

Posts: 4,539
iTrader: (0)

Quote:
Originally Posted by Xcelrrate View Post
I am about to be in the market to be getting me some new Michelin PSS tires all around. I don't know how much thread I currently have left on my PS2's, but I haven't reached my wear bars yet!

I am planning/ wanting to track my car this Sunday @ Chuckwalla.

I figured what a perfect time and place to finish and burn off my tires before slapping on the new PSS's

So as the title says, what is the minimum acceptable tread depth? I will be traveling from Las Vegas to Chuckwalla which is a 225 miles away.

I am anticipating to finish off my tires, but just wanted to budget enough rubber to get me back home, another 225 miles...

Weather looks good, so I should be able to drive home on Track-Made-Slicks right? LoL
Taking 95?
__________________

BRP CW13 1:58 | CVR CW 2:01 | CVR CCW 2:02 | ACS 1:53 | WSIR 1:34
2013 E92 M3 Jerez Black DCT ZCP | JRZ RS Pro | Brembo BBK | Endless ME20 | Volk TE37 18x10.5 squared | NT01/TD
OC3 is offline   United_States
0
Reply With Quote
      10-26-2012, 01:39 AM   #4
rzm3
Moderator
 
rzm3's Avatar
 
Drives: E92 M3
Join Date: Aug 2007
Location: USA

Posts: 4,585
iTrader: (14)

Quote:
Originally Posted by sleepless View Post
If it isn't raining, slicks are perfectly fine for the drive back
+1... unless your tires start to cord.
__________________
E92 M3 DCT - AiM EVO4 Data Logger / AiM SmartyCam HD / KW Competition 2-Way / OMP ARS Racing Seats / Brembo GT 365 / Pagid Yellow RS-29 / Rear Seats Delete
rzm3 is offline  
0
Reply With Quote
      10-26-2012, 03:36 AM   #5
Xcelrrate
Driver
 
Xcelrrate's Avatar
 
Drives: E90 ///M3
Join Date: Sep 2010
Location: Las Vegas, NV

Posts: 350
iTrader: (3)

Garage List
2008 BMW E90 M3  [5.00]
Quote:
Originally Posted by OC3 View Post
Taking 95?
Yes I am....

Why the inquiry ? Might you be on this same stretch of road?

Oh look, we're almost twins.
__________________

'08 Jerez Black E90 ///M3
Pics of my Ride
Xcelrrate is offline   United_States
0
Reply With Quote
      10-26-2012, 05:57 AM   #6
LiM3y
Major
 
LiM3y's Avatar
 
Drives: 2008 E90 M3
Join Date: Jun 2009
Location: CT

Posts: 1,139
iTrader: (2)

Rule of thumb for tread depth:

Tread depth = brain mass/balls circumference

This relationship is useful for many activities associated with track days such as braking distance, entry speed, etc. ...
__________________

Last edited by LiM3y; 10-26-2012 at 06:07 AM.
LiM3y is offline   United Kingdom
0
Reply With Quote
      10-26-2012, 09:23 AM   #7
Porschefile
Major
 
Porschefile's Avatar
 
Drives: E92 M3 DCT, E46, '12 ZX6R
Join Date: Jul 2008
Location: Tennessee

Posts: 1,153
iTrader: (6)

Quote:
Originally Posted by LiM3y View Post
Rule of thumb for tread depth:

Tread depth = brain mass/balls circumference

This relationship is useful for many activities associated with track days such as braking distance, entry speed, etc. ...
true. I have started a track day barely above PS2 wear bars and wore them until they got below the bars but not corded, and then called it a day (3 sessions IIRC). At that point the inner part of the tire toward the middle had no grooves or tread really. I guess my brain mass saved me.

FWIW my AD08 are at 3/32 on the insides and 5/32 middle and I'm planning on taking them to Barber and back next weekend (250mi).

Last edited by Porschefile; 10-26-2012 at 09:32 AM.
Porschefile is offline  
0
Reply With Quote
      10-26-2012, 04:21 PM   #8
rhouck
Registered
 
rhouck's Avatar
 
Drives: 2008 E92 M3
Join Date: Sep 2011
Location: Los Angeles, CA

Posts: 235
iTrader: (2)

Quote:
Originally Posted by Xcelrrate View Post
I am about to be in the market to be getting me some new Michelin PSS tires all around. I don't know how much thread I currently have left on my PS2's, but I haven't reached my wear bars yet!

I am planning/ wanting to track my car this Sunday @ Chuckwalla.

I figured what a perfect time and place to finish and burn off my tires before slapping on the new PSS's

So as the title says, what is the minimum acceptable tread depth? I will be traveling from Las Vegas to Chuckwalla which is a 225 miles away.

I am anticipating to finish off my tires, but just wanted to budget enough rubber to get me back home, another 225 miles...

Weather looks good, so I should be able to drive home on Track-Made-Slicks right? LoL
Do you have the PSS's already? Throw them in the car and bring them with you JUST IN CASE. Better to have them mounted nearby than deal with a 200+ mile tow...

And I'll be out there Sunday as well in my S2000 (white, no aero). Buddy will be there in an orange 1M as well. Come say hi
__________________
2009 Honda S2000 -- 1:59.726 Buttonwillow 13CW (N/A, OEM Aero, RS3); 1:55.792 Buttonwillow 13CW (S/C, aero, RS3)
2008 BMW e92 M3, 6MT, MR/FR, NT-03+M 18x10, JIC Coilovers
2007 Yamaha R6
M-drive retrofit! http://www.m3post.com/forums/showthread.php?t=676825
rhouck is offline   United_States
0
Reply With Quote
      10-26-2012, 04:30 PM   #9
CanAutM3
Colonel
 
CanAutM3's Avatar
 
Drives: 2008 E92 M3 SS2 DCT
Join Date: Jan 2012
Location: Montreal

Posts: 2,710
iTrader: (0)

Garage List
2008 BMW M3  [0.00]
2006 Audi S4  [0.00]
What others have said, if it is not raining, you can wear them down past the wear bars without worry. Even if you show a little cord, you can still safely drive them the 255 miles home.
CanAutM3 is online now   Canada
0
Reply With Quote
      10-26-2012, 04:34 PM   #10
Xcelrrate
Driver
 
Xcelrrate's Avatar
 
Drives: E90 ///M3
Join Date: Sep 2010
Location: Las Vegas, NV

Posts: 350
iTrader: (3)

Garage List
2008 BMW E90 M3  [5.00]
Quote:
Originally Posted by LiM3y View Post
Rule of thumb for tread depth:

Tread depth = brain mass/balls circumference

This relationship is useful for many activities associated with track days such as braking distance, entry speed, etc. ...
HAHAHA Nice...I like that one.. Last time I checked, Ball circumference is on the larger side... But I'll have some brain mass so I can have a car to drive home... lol

Quote:
Originally Posted by rhouck View Post
Do you have the PSS's already? Throw them in the car and bring them with you JUST IN CASE. Better to have them mounted nearby than deal with a 200+ mile tow...

And I'll be out there Sunday as well in my S2000 (white, no aero). Buddy will be there in an orange 1M as well. Come say hi
I'll look for you guys... What group are you and your buddy running in ?

Names Kenny btw, see you out there
__________________

'08 Jerez Black E90 ///M3
Pics of my Ride
Xcelrrate is offline   United_States
0
Reply With Quote
      10-26-2012, 04:37 PM   #11
Xcelrrate
Driver
 
Xcelrrate's Avatar
 
Drives: E90 ///M3
Join Date: Sep 2010
Location: Las Vegas, NV

Posts: 350
iTrader: (3)

Garage List
2008 BMW E90 M3  [5.00]
Quote:
Originally Posted by CanAutM3 View Post
What others have said, if it is not raining, you can wear them down past the wear bars without worry. Even if you show a little cord, you can still safely drive them the 255 miles home.
thanks
__________________

'08 Jerez Black E90 ///M3
Pics of my Ride
Xcelrrate is offline   United_States
0
Reply With Quote
      10-26-2012, 04:59 PM   #12
rhouck
Registered
 
rhouck's Avatar
 
Drives: 2008 E92 M3
Join Date: Sep 2011
Location: Los Angeles, CA

Posts: 235
iTrader: (2)

Quote:
Originally Posted by Xcelrrate View Post
I'll look for you guys... What group are you and your buddy running in ?

Names Kenny btw, see you out there
5 (advanced, open passing). I'm Ryan and 1M is Eric.
__________________
2009 Honda S2000 -- 1:59.726 Buttonwillow 13CW (N/A, OEM Aero, RS3); 1:55.792 Buttonwillow 13CW (S/C, aero, RS3)
2008 BMW e92 M3, 6MT, MR/FR, NT-03+M 18x10, JIC Coilovers
2007 Yamaha R6
M-drive retrofit! http://www.m3post.com/forums/showthread.php?t=676825
rhouck is offline   United_States
0
Reply With Quote
      10-26-2012, 05:07 PM   #13
djantlive
Private
 
Drives: E46 Vert
Join Date: Oct 2012
Location: SF Bay Area

Posts: 62
iTrader: (0)

check with the track organizer. most requires 4mm for the tech inspection.

unless you are running an oval, you shouldn't have a problem. if you are running an oval at high speed, you should probably not run the tires into the wear bar or below. monitor your tire pressure after each session.
djantlive is offline  
0
Reply With Quote
      10-26-2012, 08:03 PM   #14
Xcelrrate
Driver
 
Xcelrrate's Avatar
 
Drives: E90 ///M3
Join Date: Sep 2010
Location: Las Vegas, NV

Posts: 350
iTrader: (3)

Garage List
2008 BMW E90 M3  [5.00]
Quote:
Originally Posted by djantlive View Post
check with the track organizer. most requires 4mm for the tech inspection.

unless you are running an oval, you shouldn't have a problem. if you are running an oval at high speed, you should probably not run the tires into the wear bar or below. monitor your tire pressure after each session.
Copy that, thanks...

I got my tire press gauge ready, check !
__________________

'08 Jerez Black E90 ///M3
Pics of my Ride
Xcelrrate is offline   United_States
0
Reply With Quote
      10-26-2012, 10:27 PM   #15
bigjae1976
Takes threads off topic...daily
 
bigjae1976's Avatar
 
Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Milwaukee, WI

Posts: 5,081
iTrader: (11)

Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
I wear mine down until the insides are smooth.
__________________


Sponsored by Momentum BMW #593...We Bleed BMW BLUE!
bigjae1976 is online now  
0
Reply With Quote
Post 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 09:22 PM.




m3post
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