https://www.leafbike.com/
https://www.leafmotor.com/

* This 20 inch BMX bike motor kit combines the full E-bike technology: direct drive Brushless Gearless high torque hub motor to change almost every bicycle into a personal electric bike. Save energy, protect environment and save money with a lot of fun.

Main Features:
. Rim A: 20 inch double wall Alloy Rim Fit For: 20 × 1.35" / 1.5" / 1.75" tire
. Spoke: Silver 12 gauge / 68mm Length × 36 pcs

. Rim B: 20 inch double wall Alloy Rim Fit For: 20 × 1.95" / 2.0" ~ 2.5" tire
. Spoke: Black 12 gauge / 72mm Length × 36 pcs

. Engine: Bldc hub motor
. Voltage: 60V
. Power: 2000W
. Efficiency: 90.5%
. Max speed: 40mph
. Mechanical brake: V 
. Freewheel: single speed cog
. Cable location: Shaft end, Right
. Cable length:150cm / 60" 
. Install: spacing of 110mm rear fork
. Noise: 60 db
. Surface: Black painted

. Driver: brushless controller
. MOSFET: 18 PCS
. With LCD: YES
. Rated Voltage: DC 60 Volts
. Min. Voltage: DC 50 ± 0.5 V
. Rated power: 2000 Watts
. Casing material: aluminium
. Maximum Current: 55 A ± 2 Amps
. Thermal: aluminum shell and the substrate
. 3 phase 120° brushless motor
. Operating Conditions: -20~45 °C
. Waterproof design
. Size: 234 mm L × 82 mm W × 42mm H

With LCD, More function:
* Cruise -- Green button Control While motor is working,press green button one time,it will be "CRUISE" - running as the same speed
* Reverse -- Yellow button Control "Left side & mid / forward -- "Right side / backward"
* Kmh / mph
* Max speed 0 ~ 72 kmh / 45 mph
* Pedal assist  1 - 5
* ...

Package Content:
1 x BMX 20 inch 60V 2000W rear hub motor wheel Fit for 110mm rear dropout
1 x 60V 2000W motor controller
1 x LCD-003
1 x Twist throttle -- Cable length: 1500mm
1 x Brake levers -- Cable length: 1500mm
1 x Three button switches control cruise, reverse .. -- Cable length: 1500mm
1 x Pedal assist -- Cable length: 900mm

Net Weight: 11.0 kg / 24.2 lbs
Package Size: 50cm L x 50cm W x 23cm H  /  19.7" L x 8.7" W x 8.7" H
Package Type: Cardboard Box