I've seen #1 actually have an effect. At Nationals one year (or maybe it
was a Tour or a Pro, I can't remember, but we had on-site mounting service),
Bob Tunnell marked the location of the valve stems on the tire sidewall.
After his first run, his tires had moved almost 180 degrees on the wheel!
It was probably due to hard braking is the theory.
The thing that occurred to him that caused him to mark them in the first
place was that he noticed that the mounter had used an abnormally generous
amount of lubricant when mounting his tires. Presumably with a normal,
dryer mounting process this wouldn't have happened.
But if your tires are mounted more than an hour before you run (in the Bob
Tunnell case, it was something like that) then the lubricant will probably
have had a chance to dry.
Josh
----- Original Message -----
From: "Kevin Stevens" <kevin_stevens@pursued-with.net>
To: "Yeoh Yiu" <squid@panix.com>
Cc: <ba-autox@autox.team.net>
Sent: Saturday, April 20, 2002 12:46 PM
Subject: Re: Q: New Hoosiers: scrub in or race ready ?
> On Saturday, April 20, 2002, at 12:33 , Yeoh Yiu wrote:
>
> > I've ordered some Hoosiers for solo2 use, from TireRack.
> > (in size 215/40/16 which is not listed on tire rack.com).
> >
> > Normally new tires require gentle driving for the
> > first ~200 miles because
> >
> > 1. the lubricants used on the rim when mounting can allow
> > the tire to spin wrt the rim, and then balancing will be off;
> > 2. the new tire is still greasy, and will not grip well.
> > 3. a gentle heat cycle will increase the tire's longevity.
> >
> > I ordered the tirerack heat cycling service.
> > I expect this service takes care of #3.
> >
> > What about concerns #2 and #3 ?
> >
> > Should I drive my Hoosiers on a street for a bit, or should
> > the first time I use them be a timed solo2 run ?
> >
> > squid.
>
> 2 and 3 are dealt with by the heat cycling. 1 is kind of interesting,
> but I've never heard of it as a concern in autocross; only drag racing
> where you have low pressures and high torque. I suggest you mark the
> tire/rim, drive normally at the event, and see if it's an issue. I
> don't balance autocross tires anyway.
>
> KeS
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