For 138 90H motor powertrain kits, it could be used for electric motorcycle, which could be 72V 110KPH.
e.g. Dirt bike
E-motorcycle weight, approx 130kg+2*80kg
Speed: continuous 110km/h
Gear ratio: 1:2.3*3 (double steps transmission )
Climbing slope: 30°@208kg
Tire: 0.6138 130/70-17
P.S. If you have any confused about the shipping cost, please feel free to contact with us.
Also could place order but don't pay first, then we could adjust the price.
Sales contact: firstname.lastname@example.org
Skype: Damon Wong(QSMOTOR)
We Chat:+86 18758618893
One set including below kits
1. 1pc X QS 138 4kW Liquid Cooled Mid drive motor
Aliexpress online purchasing link for this motor:
1) Light weight and small dimension compare to hub motor
2) High performance benefit from flux weakening
3) High efficiency during climbing, and better acceleration
4) Support regenerative braking
5) Water Cooler, which would have better temp resistance.
Conversion Kits for QS-138-4KW 90H water-cooled mid drive motor
EV YOUR LIFE!