Thanks for your comment on my "Pedaling a Bulldozer - Fat Bike" blog. You mentioned see a person on a fat bike bouncing along. Bouncing on the big high-flotation tires can happen with a fat bike.
There is some skill required to ride smoothly on a fat bike. However, the frame material can contribute to ride quality. The cheaper fat bikes are made from high-tensile strength steel and are very bouncy because the frame is flexible. The better fat bikes are made from chrome-moly alloy steel and are less-bouncy because of a stiffer frame.
My fat bike's frame is made from hydro-formed 7051 heat-treated aluminum alloy. My fat bike's frame is stiff and light. The 9:Zero:7 is not bouncy and, as a bonus, the stiff frame makes the bike very responsive to steering input. As a matter of fact, the 9:Zero:7 is fairly touchy for a fat bike.
Coming by to see how you are doing,,,,and I see you have not been on the site for awhile.......... hope all is well and we are here when you are ready to come back......., remember to come by our Daily Chat for daily encouragement,,,,, and also it gives you a place to "vent",,,, as this journey is not easy but made easier with friends that understand........ we are all trying to get healthy and feel sexy again!