Motor Sprocket For Electric Bike Engine pinion 25H/T8F/410/420/428

The main parameter of 25H 11T Pinion Dtype:
Teeth:11T
Teeth thickenss:2.3mm(middle thickness 4mm);
Gears distance:6.35mm
Inner diameter8mm(before buying,please confirm it,because 25H small pinion have three sizes)
Install type:D type inner hole
Outer diameter:25mm
Weight:8g
Suitable Chain:25H chain
Suitable motor:High-speed motor such as small dolphin electric scooter

The main parameter of 25H 11T Pinion Htype:
Teeth:11T
Gears distance:6.35mm
Teeth thickenss:2.3mm
Inner diameter:10mm(inner diameter)(inner width 8.5mm)(before buying,please confirm it,because 25H small pinion have three sizes)
Install type:D type inner hole
Outer diameter:25mm
Height:4mm(gears middle thickness)
Weight:5g
Suitable Chain:25H chain
Suitable motor:Huadong surf electric scooter and other high-speed motors

The main parameter of T8FH 11T Pinion:
Teeth:11T
Inner diameter：10mm(inner diameter)(inner width 8.5mm) 
Outer diameter:31.5mm
Thickness:4mm 
Weight:15g
Suitable Chain:T8F chain
Suitable motor:Huadong surf electric scooter and other high-speed motors

The main parameter of 420 10T Pinion:
Teeth:10T
Gears distance:12.7mm
Inner diameter：12-17mm(inner diameter17mm)(inner width 12mm) 
Outer diameter:47mm
Thickness:5mm 
Weight:35g
Suitable Chain:420 chain
Suitable motor:Our company and Unite 1020Z,1120ZXF,1122ZXF,1418ZXFetc series geared motor

The main parameter of 420 14T Pinion:
Teeth:14T
Gears distance:12.7mm
Inner diameter：9-13mm(inner diameter9mm)(inner width 13mm) 
Outer diameter:61mm
Thickness:5mm 
Weight:80g
Suitable Chain:420 chain
Suitable motor:Our company and Unite Motor 1223F,10518 etc series geared motor

The main parameter of 428 14T Pinion:
Teeth:14T
Gears distance:12.7mm
Inner diameter：12-17mm(inner diameter17mm)(inner width 12mm) 
Outer diameter:61mm
Thickness:7mm 
Weight:110g
Suitable Chain:428 chain
Suitable motor:Our company and Unite Motor 1418Z,1020Z,1120Z etc series geared motor

The main parameter of 428 12T Pinion:
Teeth:12T
Gears distance:12.7mm
Inner diameter：12-17mm(inner diameter17mm)(inner width 12mm) 
Outer diameter:53mm
Thickness:7mm 
Weight:72g
Suitable Chain:428 chain
Suitable motor:Our company and Unite Motor 1418ZXF,1020,1120 etc series geared motor

The main parameter of 428 10T Pinion:
Teeth:10T
Gears distance:12.7mm
Inner diameter：12-17mm(inner diameter17mm)(inner width 12mm) 
Outer diameter:47mm
Thickness:7mm 
Weight:45g
Suitable Chain:428 chain
Suitable motor:Our company and Unite Motor 1418ZXF,1020,1120 etc series geared motor