I have the two
axle BF fifth wheel, on the single
axle models the
weight is considerably less, but on the few singles that i have seen the tankage was mounted below instead of within the floor. Also the cold temp models were all double
axle I think.
I sure do like the way the double axle model tows, steady as a rock, no "hobby horseing" down the road.
I now have thousands of miles on mine and plan on putting on many more.
Tom Y