Re: [CR]From what I'm understand, this shouldn't be true...

(Example: Framebuilders:Richard Moon)

Date: Mon, 5 May 2008 17:20:14 -0700 (PDT)
From: "Peter Tutty" <peter_tutty@yahoo.com>
Subject: Re: [CR]From what I'm understand, this shouldn't be true...
To: Don Williams <donwilliamsjr@gmail.com>, Classic Rendezvous <classicrendezvous@bikelist.org>
In-Reply-To: <cd45da8c0805051636q7c18e664hbaa9675eee6b86d1@mail.gmail.com>


Don,

What has happened in simple terms is this:

As you put you 260 lbs on the tyres, the bottom of the tyres deformed (spread outwards), but the internal volume (space) within the tyre/tube did not change. As the volume was not reduced, the existing air pressure was not raised.

To put it another way, in order for the air pressure to have been increased, the volume(internal space) of the container (the tyre/tube) would have had to have been reduced. In fact the container (the tyre/tube) was just reshaped.

Peter Tutty Village of Londonderry City of Penrith County of Cumberland State of New South Wales Commonwealth of Australia.

Don Williams <donwilliamsjr@gmail.com> wrote: But it is...

Hi All...

I have, in the last few years, grown to a "very stout" 260 lbs. Hopefully cycling will relieve this in a reasonable time frame. But I digress...

I'm riding Continental Giros tubular tires at around 95-100 psi. As I ride them, they don't >seem< soft to me.

Confounded and looking for another data point, I sat on the bike and had my wife check the tire pressure and it really didn't seem go up... This info did not help!

As far as I know I do not live outside the jurisdictional boundary for the laws of gravity or thermodynamics...

Any one have a idea where I'm going wrong?

All I wanted to do was determine if I'll be able to ride on a pair of Veloflex Criteriums... Without blowing them to smythereens...

Don Williams Woodinville Washington USA _______________________________________________

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