Ebike Motor Kit Freewheel Adapter for electric bicycle tricycle cart

Type 1:
Name:Bicycle Freewheel Adapter:
Outer diameter:34mm
Length:16mm
The inner hole is of an irregular shape,the large head side is about 30 mm,and the small head side one is about 20 mm.
Thread:metric positive thread
Colour:Black
Application:Bicycle scooter flywheel
Weight:40G

Type 2:
The main parameter of 21 mm inner diameter tricycle flywheel Adapter:
Inner diameter:21mm(mounting hole)
Outer diameter:34mm
Length:30mm
Hole diameter:8mm(fixed screw hole)
Weight:150 grams
Thread pattern:metric thread pattern
Adaptation:Scooter,bicycle,tricycle model flywheel
Application:Small tricycle(shaft diameter 21)

The main parameter of 27 mm inner diameter tricycle flywheel Adapter:
Inner diameter:27mm (mounting hole)
Outer diameter:34mm
Length:30mm
Hole diameter:10mm (fixed screw hole)
Weight:110 grams
Thread pattern:metric thread pattern
Adaptation:Scooter,bicycle,tricycle model flywheel
Application:Small tricycle(shaft diameter 27)

The main parameter of 31 mm inner diameter tricycle flywheel Adapter:
Inner diameter:31mm(mounting hole)
Outer diameter:34mm
Length:30mm
Hole diameter:10mm(fixed screw hole)
Weight:102 grams
Thread pattern:metric thread pattern
Adaptation:Scooter,bicycle,tricycle model flywheel
Application:Small tricycle(shaft diameter 31)