Agree in principle but, I called Hoosier a couple of years ago when the new
compounds emerged and got the straight "skinny" on the differences:
R25 to R25A - Overall better grip and better wear characteristics.. Also
fires (gets up to operating temp.) faster (~1-2 laps). We've got used
R25A's with more than one season on them that the durometer indicate are
softer than unscuffed R25's (yes, I scuffed off a patch to get a good
reading). The Hallett surface and July temp.'s will probably eat these
things up in a day.
R33 to R35 - R35 fires as fast as the old R25 (2-4 laps). Grips better than
the R33 with better wear characteristics. I wouldn't even pack these for a
Winter race (e.g., Feb. Double's, etc.).
Your choice but, Cory is right: The hotter the ambient and more abrasive
the surface, the more likely you should consider the harder compound.
As the ads state, your results may vary.
Dave Gill
----- Original Message -----
From: "Cory McLeod" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, June 15, 2007 1:21 PM
Subject: Re: [F500] R35 race tires
Charlie,
After destroying a set of R25As in one session at TMS in May, I decided
to try R35s for the rest of the summer. They have worked great. They
take about a lap more to come in, but are extrememly consistent. I have
run one set for approx 7 short sessions with hardly any decrease in
performance. I will be runnning them from now on whenever the ambient
temp is above 75 degrees.
Cory
Charlie Schlismann <[EMAIL PROTECTED]> wrote:
also posted on eformulacar.
Thinking about trying R35. Was not fond of the old R33
and have been using R25 and 25A's for years.
I'm sure this has been beaten to death in the past but
I did not pay attention then and cannot access the
archives now.
What can I expect?
TIA,
Charlie
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