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For commuter ebikes which is where lot of 7 spds are used, efficiency is not big issue. Users are more interested low maintenance and option to change gears while stopped. Clean fully enclosed chainguard is also big plus. For most cities gear range of 7 spd is more than enough.

Nice hub but reliability is unknown at present. Rohloff is more expensive but is bullet proof.

Has boosters. Thanks for video. Will let you know how I get on.

Brakes need to be perfect as usual commute is down steep windy cycle way which requires applying brakes almost continuosly for 5 minutes. More so on city bike as it doesn't have handling of MTB and my wifes not confident rider. Typically use set of disc brake pads every 1000kms on this...

Just upgrade wife's ebike to a Gepida Reptila 900, this 26" wheel version of 28" wheel 1000. Features Bosch Activeline, 400wh powerpack mounted in frame below seat, Nexus 8 spd hub, Magura HS11 rim brakes, integrated lights , Suntour NEX 50mm fork and built in Abus cafe lock. This bike...

Shimano do 9spd XT derailuer with option of long cage and shadow clutch ( useful for MTBing). May work with 11-40t. Worth it alone for quality shifting.

Make sure you service/lube CX bearing seal on drive side regularly especially over winter. If you don't what I'm talking about, ask or look, there is lot of info on it buried in these forums.

Lower gearing may help, try smaller chainring on motor.

The CX drive 11spd chain on MTB gives about 1200km with lot MTBing and regular maintenance. While STEPs drive 9spd chain on city bike gives 2500km. Both changed at 0.75 mark.

I change chainring with chain, only €8 from Bike discount, worth it to extend life of €25 kmc e11 chain and cassettee. If you don't need the full ranges of 11spd gears 11-46t, then switch to quality 9spd (Deore) derailleur maybe way to go. They now come with shadow clutch and sunrace do...

This is case where buying and fitting in LBS is better. Most shops a happy for you to do fitting on site and will have bits needed to complete job.

Bullitt. Tern, Yuba.

Suntour NCX seatpost. Suspension seatposts need a little extra height so the seat will not go as low as with current seatpost.

Gearing is just as important as torque with middrive. The lower 50nm crankdrive motors like Bosch Active, Shimano Steps shouldn't have any problems climbing steep hills. You may just have to accept slightly lower climbing speed eg 15km/hr compared to 20km/hr. Checkout...

20" wheel cargo bike can carry weight (180kg max)Tern is one example. Their bosch powered one is to expensive. Ideally find small 20" cargo bike and fit hub drive. Being 20" wheel hub motor will give better climbing ability at cost of top end speed.

A change of handle bars eg Jones and seat should give more comfortable tourer. There are 2.8" touring/ commuter tyres. Extra battery overcomes any range issues. Cheaper to work with what you have especially if you are only doing a few weeks at time.