Which are illegal Pirelli's?

Moderators: Mike Simanyi, Rick Brown, Michael Palero

David Crandon
Posts: 28
Joined: Thu May 20, 2010 10:34 am
Location: Corona, CA

Which are illegal Pirelli's?

Postby David Crandon » Sun Nov 28, 2010 9:20 am

OK, so I'm a newbie, running an 03 S2000. I'm running uncompetitively in the STR class because of mods I did just for the street, and don't have to bucks to convert yet to a competitive class. So, I'm just having fun right now!

I was offered some street tires for a good price...some Pirelli P-Zero's. But somebody mentioned that there is a particular Pirelli street tire that is excluded by the rules.

These are the newer P Zero's (treadwear 220), (not the older P Zero System, treadwear 140, also called P Zero Direzionale and Asimmetrico), and not the R compound Corsa. I've been told that the newer PZero is a higher performance track tire than the older type PZero System, even though it's got a much higher treadwear rating.

Anybody know anything about these tires in general, and which are excluded?

Thanks from a newbie.

User avatar
Eric Clements
Solo Safety Steward
Posts: 841
Joined: Thu May 15, 2008 11:25 am
Club: No$
Car#: 30
Location: Pasadena

Re: Which are illegal Pirelli's?

Postby Eric Clements » Sun Nov 28, 2010 8:48 pm

Corsa.

User avatar
Kurt Rahn
Posts: 3914
Joined: Thu May 15, 2008 11:29 am
Club: CASOC
Car#: 88
Location: Pasadena

Re: Which are illegal Pirelli's?

Postby Kurt Rahn » Sun Nov 28, 2010 8:49 pm

David Crandon wrote:Anybody know anything about these tires in general, and which are excluded?

From the ST section of the 20210 rules:
"14.3 C. Tire models must not appear on the following list, which may be altered at any time by the SEB upon notification of the membership.

Pirelli P Zero Corsa"

Hope you're having fun with your new obsession!

Edit: Damn...Eric took the short-winded route and beat me.
==============
Oversteer is better than understeer because you don't see the tree you're hitting.

User avatar
Eric Clements
Solo Safety Steward
Posts: 841
Joined: Thu May 15, 2008 11:25 am
Club: No$
Car#: 30
Location: Pasadena

Re: Which are illegal Pirelli's?

Postby Eric Clements » Sun Nov 28, 2010 8:53 pm

Kurt Rahn wrote:
Edit: Damn...Eric took the short-winded route and beat me.
When in doubt take the short route!

David Crandon
Posts: 28
Joined: Thu May 20, 2010 10:34 am
Location: Corona, CA

Re: Which are illegal Pirelli's?

Postby David Crandon » Sat Jun 25, 2011 7:53 pm

I'm the OP for this question last year...

Just wondering if anyone knows why the rulebook specifically excluded the P-Zero Corsa. It has a treadwear rating of 60, so it's automatically excluded from STR class anyway (like all R-Compound tires), so why does the rulebook specifically mention this tire?

User avatar
John Stimson
Posts: 479
Joined: Thu May 15, 2008 11:27 am
Club: PSCC
Car#: 124

Re: Which are illegal Pirelli's?

Postby John Stimson » Sat Jun 25, 2011 11:39 pm

Pirelli made one size of the Corsa with a higher treadwear rating (over 140).

Bob Beamesderfer
Posts: 3376
Joined: Thu May 15, 2008 11:26 am
Club: PSCC
Location: Orange
Contact:

Re: Which are illegal Pirelli's?

Postby Bob Beamesderfer » Mon Jun 27, 2011 5:38 pm

John Stimson wrote:Pirelli made one size of the Corsa with a higher treadwear rating (over 140).


And to expand on that answer, the rules require a minimum number of sizes, five I think, to make a tire legal for competition, whether it's an R-comp or a street tire. Don't know about full-on slicks.

User avatar
John Stimson
Posts: 479
Joined: Thu May 15, 2008 11:27 am
Club: PSCC
Car#: 124

Re: Which are illegal Pirelli's?

Postby John Stimson » Thu Jun 30, 2011 8:15 am

I don't think they needed to consider whether it met the availability requirements. The size with the high treadwear rating is probably the same basic tire as the other sizes, which are DOT-Rs, so it was excluded from Street Touring.

User avatar
Mako Koiwai
Posts: 6489
Joined: Thu May 15, 2008 11:25 am
Club: SCNAX
Car#: 34
Location: South Pasadena, CA
Contact:

Re: Which are illegal Pirelli's?

Postby Mako Koiwai » Thu Jun 30, 2011 8:40 am

GRM has another ST tire test, using their STR MX5


Return to “Public Rules Discussion”

Who is online

Users browsing this forum: No registered users and 1 guest