Can anyone suggest hub conversion kit options for a Dahon Helios P8 with 74mm front axle and 130mm rear?

[RogerA]

I have the 201rpm version. I'm interested in hill climbing ability rather than speed. I've set the max assist speed at 20 kph so I'm pedalling above it on the flat.

 

[guerney]

There's a Shimano MF-TZ07 14-28T (freewheel) on the Espresso, which looks in good nick now that all the rust has been removed by that mad mix of liquids. Looks like Percy's dad really did mostly use this bike on the road, judging by the wear on the smaller cogs, and there's little wear. I'd prefer a 11-34T at some point to better tackle hills (The Shimano Tourney rear derailleur already on the bike can handle 34T, say Shimano), while being speedy over the flats, but it's turning out to be difficult to find a 7 speed 11-34T made by a good brand.

 

[guerney]

I'm interested in hill climbing ability rather than speed.

Hills worry me with hub drives - there are very steep hills I'm always crawling up on lowest gear using my mid-driven 20" folding bike, while towing a 90kg+ trailer including cargo, that's at the very limit of the BBS01B's capability (52T>34T). The 26" wheeled Espresso with BBS01B might not manage that at all.