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The Shimano nexus 7 speed hub on my bike seems to have given up the ghost (36h rim brake, not roller brake) I can only find nexus 8 speed units online Anyone know if this will work? I know the bike has a sensor which senses cable movement in the gear selector and eases off motor power during...

Looking for a conversion kit for my wifes bike (trek hybrid) She is about 12st, terrain around here is fairly hilly (Bath, UK) A continuation on the hub vs chain drive theme: My A level physics suggests that for getting up hills, the torque produced by a motor is more important than the power...