This is the DF3 (Double Dually Dinglefucker) from fast boy at Fast Boy Bicycles. I’ve long admired Ezra’s work, especially the “Thunderfucker” fat tire bicycle since he was building them from Surlys. His work is very much worth perusal.
There’s not much more to say about this bike. Fat Schwalbe slicks, White Industries dual drive train, custom frame and fork made to the ultimate functional and aesthetic level. Pure fun.