48V450W mid drive motor kit for ebike 3speed brushless gear motor

Description

this is a heavy duty motor for bike,big volume,enough coils and cooling fin,redundant design.it can withstand large current without heating,so it is powerful and durable.
Max Speed: for example, 26 inch mountain bike about 40-50KM/h
48V450W mid driv motor kit
3 speed (the cranset have 4 chains,1 for motor transmission,the other 3 chains for bike derailleur)
rated out put:154rpm,26N.m(B.B)
Max torque:139N.m(B.B)
weight:motor 4KG,package 8KG
for B.B 68mm only
motor diameter:120mm
controller limited current:22A(this motor can overload as powerful as 750W)
list
motor and mount
controller
crankset
B.B axle
throttle
brake senor
chain
B.B tool
hoops
motor:brushless,AL shell,gear
mount:stainless steel
crank:forged AL,170mm
B.B axle:forged steel
chain wheel:steel
crankset &B.B axle :beraing & B.B righe end  is interface fit
，
High concentricity & durability
shipping choice: (you can consult me)
1.standard shipping: by air (shiping time 5-10 days
/ US as example
)
2.economy shipping:by air&sea,(
shiping time 20 days-1 month
/ US as example
)
3.flat rate freight:by sea(
shiping time 1-2 month/ US as example
)