[Autox] Current R compound choices

Tom Holt tom at sth2.com
Thu Dec 17 08:11:06 MST 2009


So, what am I missing here...

A 245-45-18 has a diameter of 26.7"
a 295-30-18 has a diameter of 25"

How does a smaller diameter tire increase your top speed in second? Did 
somebody transpose a number?

Tom


---------- Original Message -----------
From: "Warren" <kd4z at amsat.org>
To: Autox at autox.team.net
Sent: Thu, 17 Dec 2009 08:05:51 -0500
Subject: Re: [Autox] Current R compound choices

> On 10 Dec 2009 at 23:10, Alan Dahl wrote:
> > > I'm looking at a 245/45-18 application for a Solstice GXP.
> > 
> > That size would be way too short for the GXP unless you plan on
> > shifting all the time. The 295/30-18 A6 is the tire of choice for
> > folks racing the Solstice GXP as it gives the highest speed (56-57mph)
> > in second.
> >
> 
> Thanks for that Alan.  I have noticed the gearing is really short.    
Going up to 295 is quite a 
> jump from stock.  I am wondering about the stock 8" wheel width being wide 
enough for a 
> 295?    No fender rub at limits?    I don't have the Z0K so I'm not too 
worried I'd have a 
> problem.
> 
> The specs on Tirerack are recommending a 9.5" minimum.   Does it look like 
it's bulging out !  
> I am guessing it's a trade off.   How's the turn-in with this setup?
> 
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------- End of Original Message -------


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