At the risk of instigating another P vs ST tire controversy, I note that
my '81 Bigfoot
has P225 75 R15 tires
. While I find the numbers associated
somewhat of a mystery, I presume the R15 means 15" radials, so
I guess the answer to your question would be yes. I can't comment on whether
the 15" is better, since that is what I bought it with, but from my point
of view they seem fine. There is lots of clearance for these tires.
Speaking of Bigfoots (Bigfeet?) I notice a Bigfoot 5th wheel I pass daily on
my ride from work is for sale
. This might be of interest to someone in the
Calgary, Alberta area. There is no phone number, just the sign, and I have no
details on size or year.