Longevity of Yokohama A032Rs

[Larry C Leung]

Sounds to me like an alignment problem, perhaps the Yoko's are more
sensitive to this. IF there is chunking on the outer shoulders, you
should considere adding more negative camber so that the tread
temperatures (as measured IMMMEDIATELY after completing a run/lap
whatever) are essentially even or a most about 4 or so degrees different
from three points across the tread, outer shoulder tread, center and
inner shoulder, always in the same order, and each tire measured in the
same order as previous measurents. The warmer the temp, the more that
portion of the tire is being used. I've heard nothing adverse about the
Yoko 032 R other than it's not as fast as the true DOT "R" tires which it
outlasts, but is faster than the best street rubber such as the Michelin
Pilot MMX or Bridgestone S-02 PP. Another thing that can cause chunking
and premature shoulder wear is too fast a turn entrance or too much
throttle on exit. You may have to modify your driving style to stay
within the capabilities of the tire. 

LL - NY

On Tue, 15 May 2001 18:39:21 -0400 "John Corbishley"
<jcorbs at gtresort.com> writes:
>Fellow Listers:
>
>You might remember my asking for your opinions irt a track tyre for 
>the Grattan QCUSA event.  Having received all those endorsements for 
>KUMHO, I promptly went off and got a set of the above.  This was based 
>on the recommendation of a close and long time friend and also the 
>fact that I'd seen a number of folks using them at previous events.  
>The possibility of rain was also a  factor.
>
>The reason for my post is that my set displayed some inordinately high 
>wear compared to any of the other participants using the same tyres, 
>and was wondering whether anyone else had had a similar experience 
>recently.
>
>I was running them on my '85 UrQ which has the Lehman chip but nothing 
>else in the performance mod category, H&R springs and KONI sport 
>shocks from Keith Anderson.  The pressures were such that the "roll" 
>on the sidewalls matched the indicator arrows.  Yet lots of chunking 
>and deterioration.
>
>I'd also had them heat cycled by the Tire Rack when I purchased them.
>
>While I understand that these are much softer than the AVS 
>Intermediates that I ran at 5 previous events (and still have another 
>5 events life in them), I cannot reconcile how mine have deteriorated 
>relative to those of other QCUSA members in similar cars.
>
>To date the Tire Rack has largely blown my enquiries as to the 
>possibility of a bad batch off, saying that all they can do is refer 
>the issue to Yokohama.
>
>I am not looking for any free lunches here.  If I just overdrove the 
>tyres and toasted them so be it.
>
>I would appreciate any btdts or other insights.
>
>TIA
>
>John Corbs