I recently swapped my 14" tires.  I put my older Nokian Hakkapelitta C mud
and snow on the front, replacing Hankook RAO 8s that were even more worn
than the hakkas.  This greatly increased the effort to steer at parking
speeds.  I have no power steering.  I have decent arm strength, but I now
find it quite a chore to turn the wheels without any movement of the van,
where with the RAO 8s, it was much easier.  I have about 43psi (dunno how
many Barrs that is) in the tires.  Once rolling and at higher speeds, the
Hakkas steer and track just fine.