Wheels and Tires All things related to Miata Wheels and Tires.
Sponsored by:
Sponsored by:

Unusual wear on R-comps

 
Old 05-18-2015, 11:40 PM
  #1  
Senior Member
Thread Starter
 
Join Date: May 2008
Location: Canada
Posts: 821
Total Cats: 472
Default Unusual wear on R-comps

I just removed my track tires after a two-day HPDE. I had noticed that the insides of all tires were wearing more quickly than the outsides, which is unusual (as far as I know). Even worse, the driver-side rear had corded on the inside (near the shoulder).

These were slightly-oversized BF Gooodrich R1s (225/50-R15) on 9" 6ULs, leftovers from the 15x8 6ULSs I purchased for the street (on account of planning for 11.75" front brakes). The 225/45-R15 NT-01s I usually use exhibited what I consider normal wear - fairly even across the treadface, but ultimately more so on the outside because of the compromised camber I run on my dual-purpose street/track car.

Any thoughts or suggestions? I'll be getting the alignment checked, of course, but this wear pattern is unusual enough that I thought I'd ask the gurus.
DeerHunter is offline  
Old 05-19-2015, 07:25 AM
  #2  
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,347
Total Cats: 85
Default

Pics?
Leafy is offline  
Old 05-19-2015, 11:20 AM
  #3  
Senior Member
Thread Starter
 
Join Date: May 2008
Location: Canada
Posts: 821
Total Cats: 472
Default

Took these this morning:

Overview (corded tire on top):


Close-up:


Severe inside wear pattern:


Thanks.
Attached Thumbnails Unusual wear on R-comps-corded.jpg   Unusual wear on R-comps-corded-close-up-.jpg   Unusual wear on R-comps-inside-wear.jpg  
DeerHunter is offline  
Old 05-19-2015, 12:36 PM
  #4  
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 4,449
Total Cats: 525
Default

Were the R1s new when you mounted them?

--Ian
codrus is offline  
Old 05-19-2015, 12:49 PM
  #5  
Senior Member
Thread Starter
 
Join Date: May 2008
Location: Canada
Posts: 821
Total Cats: 472
Default

Originally Posted by codrus View Post
Were the R1s new when you mounted them?

--Ian
No, they were used, sporadically, by my brother for a couple of season's autocrossing (yes, wrong compound for that) and then stored in a clean, dry basement for a couple more years. I mounted them inside out, in the expectation that wear patterns would be normal.
DeerHunter is offline  
Old 05-19-2015, 01:00 PM
  #6  
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 4,449
Total Cats: 525
Default

Originally Posted by DeerHunter View Post
No, they were used, sporadically, by my brother for a couple of season's autocrossing (yes, wrong compound for that) and then stored in a clean, dry basement for a couple more years. I mounted them inside out, in the expectation that wear patterns would be normal.
In that case, my guess is that your brother used up most of the tread on the outside edge. By flipping them you prolonged the life, but you didn't flip them early enough in the overall life of the tire to totally even them out.

--Ian
codrus is offline  
Old 05-19-2015, 01:31 PM
  #7  
Senior Member
Thread Starter
 
Join Date: May 2008
Location: Canada
Posts: 821
Total Cats: 472
Default

Originally Posted by codrus View Post
In that case, my guess is that your brother used up most of the tread on the outside edge. By flipping them you prolonged the life, but you didn't flip them early enough in the overall life of the tire to totally even them out.

--Ian
You could be right. However, when I took trackside readings, the tread temps were hotter on the inside and cooler on the outside, which jibes with the resulting wear. Could it be something about the construction of these tires that causes this? I read on another site that they tend to like less negative camber than other R-comps, but I'm only running about 1.5 degrees, not the 2.5+ degrees that more dedicated track cars can run.
DeerHunter is offline  
Old 07-15-2015, 06:22 AM
  #8  
Newb
 
Join Date: Jul 2015
Posts: 9
Total Cats: 0
Default

Could be the extra grip caused your eccentrics to slip? Perhaps your alignment is out of whack - that'd lead to severe wear.
hufflepuff is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bigmackloud
Miata parts for sale/trade
16
03-03-2019 03:41 PM
emilio700
Wheels and Tires
151
06-02-2017 02:36 PM
wannafbody
Wheels and Tires
5
09-25-2015 08:04 PM
nigelt
Wheels and Tires
7
09-22-2015 12:32 PM
Der_Idiot
Engine Performance
12
09-03-2015 03:31 PM


Thread Tools
Search this Thread
Quick Reply: Unusual wear on R-comps


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.