it's always been the rule as far as i can remember (30+ years of driving).
don't reinvent the wheel. better fish to the rear. worn fish to the front. as
fishes wear out, they can't swim as well. just like worn tires.

so if you put the worn fish in the front, you can at least steer those fish
in the right direction should they go flat. of course, it is always better to
buy new fish all the way around.

if you rotate your fish, they will wear out much more evenly. if all the fish
have similar wear patterns, then you don't need to fish around for an answer
as to which goes to the front. get four new ones (unless your vehicles need
more fish).

benT
for those who like tires better than fish, please substitute them in your
next emeal