"Jack" Windswept@home wrote in message
Is the tire more susceptible to UV rays and dry rot lying flat in the
bed?

If so, should it be covered? I see spare tires mounted on the backs
of jeeps, etc. are covered with ? canvas ? vinyl ? and was wondering
if they are protective. Thanks.

In the bed it can get the direct sun and that can damage it quickly compared
to hanging under the car. . Covers can go a long way to protect it. How
often do you have to use it? Last two tires that went flat on me, I was
able to add some air and drive the car to get it fixed. I don't recall
driving on a spare for over 20 years now. Not like years ago as a teenager
and we bought either used tires or re-caps. I don't miss those "good old"
days. Aside from trucks, can you even buy a re-cap?
--
Ed
http://pages.cthome.net/edhome/