I don't know how this got missed. From the SCCA news:

TOPEKA, Kan. (July 7, 2004) – Sports Car Club of America, Inc.’s Board of Directors voted Tuesday to lift the suspension placed on the Kumho ECSTA V710 tire for SCCA-wide competition.
...
The tire is again eligible for SCCA Club Racing and Solo competition, effective immediately. Competitors can tell if they have the approved Kumho ECSTA V710 by the inclusion of Polyester in the sidewall as part of the construction. The discontinued, unapproved tire does not list Polyester on the sidewall.

Link to the article.

 

Based on what I saw this past weekend, the 710 is THE tire to have for cool, low-grip asphalt.

 

Was the suspension placed for safety reasons? I just bought some used v710's, havent had a chance to mount them yet.

 

This is really old news. According to the article linked above.

Kumho had discontinued and collected the tires this spring, citing “inconsistent test results relating to tread splice and tread area durability.” SCCA followed Kumho’s lead, suspending the tire from competition in all programs on April 6.

 

Think Michelin at the 05 USGP.

 

Can we get ride of this sticky, it is no longer relavant.

 

Done