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
 
Post Reply
 
Thread Tools Search this Thread
      04-27-2019, 08:34 AM   #1
GasBurnlife(landapanda)
Captain
573
Rep
683
Posts

Drives: BMW M2
Join Date: Aug 2012
Location: Ashburn, Virginia

iTrader: (0)

Flipping directional tires

All - looking for insight regarding flipping staggered setup. I run mainly tracks that put a lot more wear on the left set of tires. What's the consensus regarding flipping wheels on the respective axels? I run directional tires (PS4s). I imagine there may be some minor impact to drive ability due to the tread design, but generally speaking I have to think the setup won't result in any safety issues that would result in tire failure.

When I rode moto, we used to flip directional tires with no issues. I expect same results with summer performance tires.

Looking for insight from those that have tried this.

Thanks!
Appreciate 0
      04-27-2019, 09:42 AM   #2
dbyrd
DSC Off!
dbyrd's Avatar
304
Rep
718
Posts

Drives: 2012 E92 M3 6MT ZCP
Join Date: May 2010
Location: Dallas

iTrader: (0)

I don't think the PS4s is a directional tire.

That said, I've run the RE71R and RS-4 in the wrong direction with zero decrease in lap times and grip. I'd advise against it in the wet though.
__________________
MCS 1WNR with 600/900 spring rates / Vorshlag camber plates / Apex ARC-8s with MSI studs / Stoptech Trophy ST-60/ST-40 / Cantrell Motorsports Brake Duct Kit / Cobalt Friction XR1, XR2s or PFC-11 pads / UUC Corsa axle-back with Fabspeed HFC and x-pipe / Schroth Quick Fit Pros / HANS Sport II / AA green filter / Coolshirt with large bag / Aim SoloDL with SmartyCam / CSF Radiator
Appreciate 3
      04-27-2019, 09:58 AM   #3
tsk94
Lieutenant Colonel
tsk94's Avatar
Canada
1515
Rep
1,587
Posts

Drives: E92 M3, E82 128i, F82 M4, E36
Join Date: May 2017
Location: Calgary

iTrader: (2)

Quote:
Originally Posted by dbyrd View Post
I don't think the PS4s is a directional tire.

That said, I've run the RE71R and RS-4 in the wrong direction with zero decrease in lap times and grip. I'd advise against it in the wet though.
Basically this, should be totally fine for use in the dry. In the wet they wouldn't work neither as well though.
Appreciate 1
      04-27-2019, 10:12 AM   #4
GasBurnlife(landapanda)
Captain
573
Rep
683
Posts

Drives: BMW M2
Join Date: Aug 2012
Location: Ashburn, Virginia

iTrader: (0)

Quote:
Originally Posted by tsk94 View Post
Quote:
Originally Posted by dbyrd View Post
I don't think the PS4s is a directional tire.

That said, I've run the RE71R and RS-4 in the wrong direction with zero decrease in lap times and grip. I'd advise against it in the wet though.
Basically this, should be totally fine for use in the dry. In the wet they wouldn't work neither as well though.
Appreciate the response guys. Sounds like switching the wheels won't be an issue and will save me a bunch of mullah for more track time.
Appreciate 0
      04-27-2019, 03:08 PM   #5
dparm
Stop the hate, get a V8
dparm's Avatar
United_States
3848
Rep
8,625
Posts

Drives: C7 Corvette GS, AMG C63 S
Join Date: Jun 2013
Location: Frisco, TX

iTrader: (1)

My understanding is that the directionality of tires is for water evacuation. On a dry track, you probably won't notice a difference.

However, some tires do have different tread compounds in different parts of the tire to aid in handling, so you could potentially lose that benefit.
__________________
Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan
Past: 2011.5 M3 sedan ZCP
Appreciate 0
      04-30-2019, 07:39 AM   #6
bigjae1976
Major General
bigjae1976's Avatar
1566
Rep
8,074
Posts

Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Houston, TX

iTrader: (22)

Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.25]
2013 BMW 328i  [5.00]
I think a PS4 is an asymmetrical tire. You can't flip them on the rim but you can swap sides with them.

I'm pretty sure the PS4 has a different rubber compound across the tire which is why you can't flip them.
__________________
2018 F30 320iX Melbourne Red
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red
2000 E36/7 Z3 Steel Blue
Appreciate 1
SYT_Shadow11421.00
      04-30-2019, 08:49 AM   #7
dparm
Stop the hate, get a V8
dparm's Avatar
United_States
3848
Rep
8,625
Posts

Drives: C7 Corvette GS, AMG C63 S
Join Date: Jun 2013
Location: Frisco, TX

iTrader: (1)

Quote:
Originally Posted by bigjae1976 View Post
I think a PS4 is an asymmetrical tire. You can't flip them on the rim but you can swap sides with them.

I'm pretty sure the PS4 has a different rubber compound across the tire which is why you can't flip them.

Correct, they are asymmetrical construction but not directional. This makes things easy -- just swap the entire wheel/tire on the axle. (e.g. move the passenger rear to the driver rear and vice versa)


Outer side: a novel hybrid elastomer for DRY grip
Inner side: new mix of compound with specific functional elastomers and silica provides excellent wet grip and braking



__________________
Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan
Past: 2011.5 M3 sedan ZCP
Appreciate 0
      04-30-2019, 02:18 PM   #8
M3 Number 86
Major General
3220
Rep
6,218
Posts

Drives: black m3
Join Date: Mar 2015
Location: pasadena

iTrader: (1)

i don't think direction is important on the track unless there is water.

but asymmetrical tires are meh since you can't go inside out
__________________
Appreciate 0
      04-30-2019, 02:19 PM   #9
M3 Number 86
Major General
3220
Rep
6,218
Posts

Drives: black m3
Join Date: Mar 2015
Location: pasadena

iTrader: (1)

Quote:
Originally Posted by dparm View Post
Correct, they are asymmetrical construction but not directional. This makes things easy -- just swap the entire wheel/tire on the axle. (e.g. move the passenger rear to the driver rear and vice versa)


Outer side: a novel hybrid elastomer for DRY grip
Inner side: new mix of compound with specific functional elastomers and silica provides excellent wet grip and braking



that still means you'll always wear the outside
__________________
Appreciate 0
      04-30-2019, 03:51 PM   #10
dparm
Stop the hate, get a V8
dparm's Avatar
United_States
3848
Rep
8,625
Posts

Drives: C7 Corvette GS, AMG C63 S
Join Date: Jun 2013
Location: Frisco, TX

iTrader: (1)

Quote:
Originally Posted by M3 Number 86 View Post
that still means you'll always wear the outside
Correct, but tires don't wear evenly on both sides of the car, in my experience.
__________________
Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan
Past: 2011.5 M3 sedan ZCP
Appreciate 0
      04-30-2019, 08:33 PM   #11
GasBurnlife(landapanda)
Captain
573
Rep
683
Posts

Drives: BMW M2
Join Date: Aug 2012
Location: Ashburn, Virginia

iTrader: (0)

Quote:
Originally Posted by dparm View Post
Quote:
Originally Posted by M3 Number 86 View Post
that still means you'll always wear the outside
Correct, but tires don't wear evenly on both sides of the car, in my experience.
Since most of the tracks I run are heavy on the right hand turns, swapping the wheels on each axle will still prove beneficial and improve tire life. Appreciate everyone's insights on this!
Appreciate 0
      05-02-2019, 09:44 AM   #12
M3 Number 86
Major General
3220
Rep
6,218
Posts

Drives: black m3
Join Date: Mar 2015
Location: pasadena

iTrader: (1)

Quote:
Originally Posted by dparm View Post
Quote:
Originally Posted by M3 Number 86 View Post
that still means you'll always wear the outside
Correct, but tires don't wear evenly on both sides of the car, in my experience.
For sure. But lasts even more when you notice all the outsides are worn after a number of events.
__________________
Appreciate 0
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



All times are GMT -5. The time now is 09:06 AM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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