Fiido m21 with torque sensor wanting a conversion kit 1500watt 52v / 58v

[Simonwwfc]

Hi all from U.K. at present I own a fiido m21 I’m looking for a rear hub kit with a 175mm or m12 axle / drop out . I’d like to go 1500watts my tyres are 20x4 plus I’d need to mount battery on top of frame can any one advise please

 

[docw009]

So they really put a torque sensor on an inexpensive hub motor folder? Well, that will complicate your search for a 25A-30A controller, because they don't know about torque sensors. And I wonder if a torque sensor is even useable for 1500 watts.

You would have to look at what ebikes.ca offers with their torque sensing products. I think the big picture is you'll be spending close to what the FiIdo costs.

 

[2old]

Can't remember where, but I think there's a thread concerning one of those that broke at the fold recently, and they may be recalling them. Anyway, not a bike I'd convert with a a big motor.

 

[docw009]

Fiido just recalled one of their light folders that broke at the fold joint, the one that uses a seatpost battery. At least they did a recall.

 

[Simonwwfc]

The re call is the Fiido x nothing to do with m21
Even if I have to do away with the torque sensors so be it and il just use the 1500 watts of power . Theses m21 are here big fat tyre bikes and can’t see a issue converting

 

[docw009]

If you're willing to go cadence sensor, pick up a 30A controller and a 750W Bafang G06 motor.

 

[Simonwwfc]

What sort of kph would this achieve it’s for off road use on private land in U.K. , could a 1500 watt motor be fitted or what you suggested be good enough

 

[E-HP]

What sort of kph would this achieve it’s for off road use on private land in U.K. , could a 1500 watt motor be fitted or what you suggested be good enough

Yes, a 1500W motor should be good enough for 1500W continuous, and likely more with some cooling mods, and plenty of speed for off-road use.

 

[Simonwwfc]

Many thanks for reply can you explain this please

 

[E-HP]

Many thanks for reply can you explain this please

If you need a 1500W motor, the easiest thing to do is to get one rated for 1500W. You could use a 1000W motor and add cooling (Statorade, hubsinks) and that would be good enough to run at 1500W continuous; so a few ways to skin the cat. 1500W alone has no bearing on speed, so can't help with that part of your question, or the idea of putting a 1500W motor on a folder.

 

[Simonwwfc]

Many thanks it’s either for me spend £900 and kirby ebike 1500 watt complete kit . I don’t have the knowledge to source my own individual parts

 

[E-HP]

Many thanks it’s either for me spend £900 and kirby ebike 1500 watt complete kit . I don’t have the knowledge to source my own individual parts

Then a kit would be the way to go. You need to make sure the wheel comes laced with a 20" fat tire rim (I see the option); and that it's made for the rear dropout width to fit your bike, measured between the inside of your droputs.