Bafang H400
Front hub
The Bafang H400 is an e-bike motor with a 250 W rating, up to 50 N.m of torque, a nominal 36 V, assistance to 25 km/h, a weight of 2.4 kg, 100mm over-locknut spacing and for 26 / 700C / 28 wheels.
Last updated: 5 September 2026
What we found
- Published as 250 W · 36 V · FM G312.250.D/V.
- 15 specifications are published for it, each with the source it was read from.
- No matching recall was found in the records this catalogue holds from 8 regulators.
Assembled from the evidence on this page. Every figure and count below is shown with the source it was read from.
Motor and performance
- Maximum torque
- 50 N.m
- Continuous rated power
- 250 W
- Weight
- 2.4 kg
- Assisted speed
- 25 km/h
- Rated voltage
- 36 V
- Ingress protection
- IPX5
“Max. Possible Torque (Nm)*** 50 Peak locked parameter, reconfiguration possible,depending on the demand of applications and battery output performance.”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Rated Power (W) 250”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Weight (kg) 2.4”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Speed (km/h) 25”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Nominal Voltage (Vdc) 36”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Disputed
“Waterproof IPX5”
Source: bafang-e.com/uploaded/manual/BF-DM-C-FM G312-D-EN.pdf
Brakes and safety
- Brake type
- Disc-Brake , V-Brake
“Brake Disc-Brake , V-Brake”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Frame and components
- Finish
- Shockproof black and silver coating
- Spoke specification
- 36H*13G
- Cable exit side
- Shaft Side_Right
- Wheel size
- 26 / 700C / 28
Source: bafang-e.com/uploaded/manual/BF-DM-C-FM G312-D-EN.pdf
“Spoke Specification 36H*13G”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Cabling Route Shaft Side_Right”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Wheel Size (Inch) 26 / 700C / 28”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Compatibility
- Axle length
- 142mm
- Motor cable length
- 250 mm
- Over-locknut dimension
- 100mm
- Connector
- G9.1
“Shaft length: 142mm”
Source: bafang-e.com/uploaded/manual/BF-DM-C-FM G312-D-EN.pdf
“Cable Length(mm), Connection Type 250 G9.1”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“OLD: 100mm”
Source: bafang-e.com/uploaded/manual/BF-DM-C-FM G312-D-EN.pdf
“Cable Length(mm), Connection Type 250 G9.1”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Identity
- Engineering designation
- FM G312.250.D/V
“Model No. FM G312.250.D/V”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Certification claims
- Certification claimed by the manufacturer
CE-EMC
BF-DM-C-FM G312-D-EN.pdf · retrieved by us 4 September 2026
“Certification CE-EMC”
Source: bafang-e.com/uploaded/manual/BF-DM-C-FM G312-D-EN.pdf
IP X6 / CE
BAFANG_Workbook_OEM_2027_EN.pdf · retrieved by us 4 September 2026
“Tests & Certifications IP X6 / CE”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
The maker’s own documents give different figures
Models documented with this motor
No model has been matched to this motor yet in the records we hold. That is a statement about our research, not about which bikes use it.