Originally Posted by spock123
I must be missing something here but the master track is about a $100 tire and the goodyear is almost $400.
You're not missing the cost factor but there is
much more. Aside from the aspect ratio mentioned
above, your ST's are trailer tires and most likely
are Load Range E with a 80psi max inflation pressure.
The G614 is a LT tire that is G rated and has a max of 110psi.
There are a lot of other factors that come into play
with the G load. So, if you are going to keep it
as a spare you will have a superior spare.
A little squirt of 303 once a year and it will
last as long as the trailer. If you want to
put it into service, you will need a matched
set. You can damage your running gear if you don't.
As far as why? They had one.