A hub conversion seems out of the question if you want to keep the carbon rims, but it's 5.8kg + BBS01B 3.4kg (according to Bafangers.com) + my 3.6kg 691Wh/19.2Ah battery would be 12.8kg of non-folding awesome. 9.61kg lighter than my bike. Have a dozen scrubbed and sent to my tent.