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Reminds me of these https://ecosmobike.com/products/windgoo-b3-electric-bike-scooter-12-inch-foldable-and-commuting-e-bike-scooter 36v 10ah battery not bad for that price. Totally throwaway design though when the battery expires

Sounds intriguing. I do think it is a compromise sometimes between the weight of the bike and how robust / suitable for an e-bike conversion it is. I did think of a light road bike, maybe a 10kg Boardman and a light weight kit, after the advice here from more experienced members I think I would...

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Thanks for reporting back, it's always nice to know we correctly identified the issue :-)

P3=1 So power based pas rather than speed based So unloaded motor will run at maximum speed irrespective of pas level (PAS levels affect the power not the unloaded speed)

ETA So the kit including motor wheel, KT display , controller and pas (not including battery)is $235 + $70 shipping (china post) $300 = £240. Theoretically there is a custom charge but I don't think it is much and I've never heard anyone having to pay it

Me and loads of people here have bought stuff from topbikekit over the years. I wouldn't hesitate to recommend them. I have that motor in a dahon clone in a 20" wheel and it is marked 250w. I would just email them and ask any questions. Never had to pay any extra in customs charges

I do have 2 other full size non foldable e-bikes, one for road/trails and one mountain bike but I think the 20" wheeled folding e-bikes are fine for road / light trails and surprisingly capable. I can do many of the same routes and they will happily do 25-30 mile rides and still be comfortable...

So tyres and wheels diameter 20.5 inch / 52 cm - think would struggle with conventional mudguards Width, I think 2.15 inch is about correct. Looks narrower in the photo but I think that is an illusion Gap between inside of forks = 6.5 cm / 2.5 inches

My theory is having the battery weight over the front wheel helps traction. Yeah the 2.15 tyres fit fine, not sure if those mudguards are really wide enough though - we'll see ! The disc 9 is different rims size and much narrower forks so you can't go nearly as wide tyres. I have set tyre...

Looks amazing, do you know is it a AKM-100 clone motor ? Are the rims "road bike size" ? How is the handling with the hub in the front wheel ? Do you notice any resistance above 25kph ? So, if the controller is max 15 amps, pas level 1 is 13% I think so output power from the controller is...

@Woosh have you got the Tongsheng 85TS kit in stock, would that be a possibility ?

Topbikekit do a 1.44 kg akm-75 front hub motor, 201 rpm (which is fine in a 700c wheel with 15.5 mph motor cut off) Very little resistance above that speed. Maybe combine with 36v 10Ah bag battery that attaches to saddle with room for controller eg Woosh (1.8kg) https://wooshbikes.co.uk/?batteries

I'm intrigued by the 2 speed gears. I'm thinking if you are not going to pedal above the legal cut off speed and you keep above 7-8 mph on hills (which is recommended for hub motors) then probably 2 speed is ideal (obviously not somewhere very hilly). I feel on electric bikes you don't use the...

Can I ask what other bikes you test rode and what you thought ?

It's quite direct but doesn't feel twitchy. I have a Dahon clone that does feel a bit more twitchy (this bike if for my son and his girlfriend)

So been out on a test ride seems good. Tried the suggested rotor spacer seems to work ok clearance wise. As suggested bolted a L shaped bracket to front mounting point through the battery bag and battery sits on that. Plenty of room in the bag for 36v 15ah Samsung 21700 celled battery , KT 15...

In terms of hub driven folding bikes, there's forum members that have been pleased with https://uk.fiido.com/products/fiido-d11-folding-electric-bike-for-commuter https://www.pedelecs.co.uk/forum/threads/fiido-d11-folding-e-bike-a-sort-of-review.41326/

I notice @egroover s recommended battery supplier Ebike Cycling Store on AliExpress has a 24v 17.5Ah branded cells version for £134 including shipping https://a.aliexpress.com/_EyYdNNQ