Originally Posted by Jonesandrew

Hi Linberl, I've just realised I owe you an apology for not understanding the word "proprietary". In my ignorance, I thought it meant commercially available generic items. I now need to clarify what I subsequently wrote.

The rear wheel is not special as I said, but I omitted to say that special (proprietary) dropouts will be required to mount a rear hub motor whether it be from Helix or any other manufacturer. Obviously a proprietary battery pack can be made by Helix to fit anywhere they choose in the "innovative way" which has yet to be revealed. I'm sorry for any confusion that I've caused.