Re: [ST] Tire Pressure on a Worn Rear

[Craig Tate <craigtt@xxxxxxxxxxxxx>]

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George,

I've been fighting with myself to avoid this discussion, because the 
polarized views are clearly in conflict.  But, I think you've settled on 
the wrong advice, so I'll throw in my $.02.

First, let me say that if your tire is so warn as to be unsafe, my advice 
would be, don't ride until you replace the tire.  In my younger, poorer 
days I have ridden with cord showing because I couldn't afford a 
replacement - but I'd never do that today.

Secondly, to state that most tire wear is caused by heat, is an over 
simplification and one that has been misinterpreted in these 
discussions.  Under inflated tires generate additional heat because of the 
increased flexing of the sidewalls.  This heat, in turn, warms the tread, 
making it softer and more susceptible to abrasion from the road 
surface.  It is abrasion that causes tire wear - heat only exacerbates the 
process.  The question is, "what part of the tire will be worn when the 
tire is under inflated?"  Rather than take my advice, or the advice of 
others here, look at any tire manufacturer's web site.  You will see that 
under inflated tires wear on the shoulders, over inflated tires wear in the 
center.  Now, ask yourself where you have the most remaining tread.

Craig

At 02:14 PM 3/2/2004 -0800, you wrote:

> > Right!  Also, the more tire that contacts the road, the more heat that
> > is generated.  The hotter a tire gets, the softer the rubber becomes
> > and the faster the rubber wears.  And, unless you're just going to go
> > around in circles, the point of highest temperature and wear will be
> > right down the middle where you tire is currently the thinnest.
>
>Thanks Blake, STeve and the rest of you for setting me straight.   You guys
>make sense...42 psi for the worn rear it is!
>
>George Cope
>Roseville, CA (where gusty 35mph wind keeps me home)
>'99 Sprint ST Midnight
>
>----- Original Message -----
>From: "Blake Sobiloff" <sobiloff@xxxxxxxxxxxxxx>
>To: <ST@xxxxxxxxxxxxxx>
>Sent: Tuesday, March 02, 2004 12:53 PM
>Subject: Re: [ST] Tire Pressure on a Worn Rear
>
>
> > On Mar 2, 2004, at 11:56 AM, George Cope wrote:
> > > Not really.  I 'm looking for a way to put more rubber on the road for
> > > two
> > > more weeks until a new one is installed.  I think the less pressure,
> > > the
> > > more the tire spreads out over the road.
> >
>
> >
> > --
> > Blake "Dawgbert" Sobiloff <sobiloff@xxxxxxxxxxxxxx>
> > President, Triumph Sport Riders Assoc.
> > San Jose, CA  (USA)
> >
> >
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