Model number

GDR-21

Position

Rear

Construction

Gear

Rated voltage(V)

36

Rated Power(w)

250-550

Weight(kg)

2.8

Reduction Ratio

1:8.5

Wheel Diameter(inch)

16-28

Rated speed(km/h)

20-30

Magnet Poles (2P)

10

Dropout(mm)

135

Brake Type

V/Disk brake

Freewheel

6-7S

Operating Temperature ©

-20---45

Efficiency(%)

≧78%

Color

Black

Cabling Route

Shaft center right

Noise Grade(dB)

≤60

IP Grade

IP54

Salt Spary Test Standard(h)

24/96