This is the Greyborg hub motor aka, Hubzilla aka Cromotor as talked about on www.endless-sphere.com This is one of the most powerful hub motors you can install into a bicycle frame. I have mine installed into a 20″ BMX wheel and run a Pirelli ML75 tire which is about 21″ in diameter. Setup runs a max of 126V@100A through a Lyen made Xie Chang 150V 18 FET controller that uses IRFB4115 FETs. My controller has been heavily modified from the way it was received form Lyen to allow me to run such high currents. Bike frame is an all steel Kent kids full suspension mountain bike frame with upgraded components and custom fab work such as the 8″ lengthened swing arm. Brake are Hayes Strokers front and rear with 203mm discs. Front fork is a 4″ travel 26″ RST fork with adjustable compression and preload, rear shock is a 140mm Cane Creek Cloud 9 air shock. Bike is missing it’s chain because I need to install the correct crank set which is 48T front 16T rear. Not sure if I’ll keep it single speed or use the triple chain ring setup in the front.