I just purchased that exact bike. Both sides of rear hub are threaded for flip flop and I have installed a 16t freewheel cog on one side. It's not a light bike, weighs a bit more than my steel road bike set up with 9 speed ultegra. Seems like a good quality frame, the paint work is nice. I'm guessing the components are on the cheap side but they work and I don't expect much at this price point. I got mine through performance on a triple points weekend and had it shipped to the store for free which made for a pretty good deal.