The Bafang H405 is an e-bike motor with up to 55 or 60 N.m of torque, assistance to 25 km/h, or 25 or 32 km/h, a weight of 3.7 kg, 138 or 143 mm over-locknut spacing, for 20 / 700C / 28 wheels, disc brake compatibility and an ingress rating of IPX6.
Last updated: 5 September 2026
What we found
- Published as RM G0210.250.D/DC and RM G0210.500.D/DC · 25 km/h, or 25 or 32 km/h — Bafang give one entry per version.
- 15 specifications are published for it, each with the source it was read from, 1 of them corroborated by a second source.
- 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
- 55 , 60 N.m
- Continuous rated power
250 / 350 / 500 W
BF-UM-C-RM G0210-D-EN.pdf · retrieved by us 4 September 2026
“Rated power (W) 250 / 350 / 500”
Source: bafang-e.com/uploaded/manual/BF-UM-C-RM G0210-D-EN.pdf
250 W and 500 W versions
BAFANG_Workbook_OEM_2027_EN.pdf · retrieved by us 4 September 2026
“Rated Power (W) 250 , 500”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
- Weight
- 3.7 kg
- Assisted speed
- 25 km/h, or 25 or 32 km/h — Bafang give one entry per version
- Rated voltage
48 V
BF-DM-C-RM G0210-D-EN.pdf · retrieved by us 4 September 2026
“Rated voltage (V) 48”
Source: bafang-e.com/uploaded/manual/BF-DM-C-RM G0210-D-EN.pdf
36 or 48 V
BAFANG_Workbook_OEM_2027_EN.pdf · retrieved by us 4 September 2026
“Nominal Voltage (Vdc) 36 , 48”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
- Ingress protection
- IPX6
“Max. Possible Torque (Nm)*** 55 , 60 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
The maker’s own documents give different figures
“Weight (kg) 3.7”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Speed (km/h) 25 , 25 / 32”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
The maker’s own documents give different figures
“Waterproof IPX6”
Source: bafang-e.com/uploaded/manual/BF-DM-C-RM G0210-D-EN.pdf
Brakes and safety
- Brake type
- Disc Brake
“Brake Disc Brake”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Frame and components
- Finish
- Black(RAL9017)/painting
- Spoke specification
- 36H*12G
- Sprocket
- 7 - 9
- Cable exit side
- Shaft Side_Left
- Wheel size
- 20 / 700C / 28
Source: bafang-e.com/uploaded/manual/BF-UM-C-RM G0210-D-EN.pdf
“Spoke Specification 36H*12G”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Sprocket 7 - 9”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Cabling Route Shaft Side_Left”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“Wheel Size (Inch) 20 / 700C / 28”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Compatibility
- Axle length
- 200mm
- Motor cable length
- 250 mm
- Over-locknut dimension
- 138 /143 mm
- Connector
- G9.1
“Shaft length: 200mm”
Source: bafang-e.com/uploaded/manual/BF-UM-C-RM G0210-D-EN.pdf
“Cable Length(mm), Connection Type 250 G9.1”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
“OLD (mm) 138 /143”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_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
- RM G0210.250.D/DC and RM G0210.500.D/DC
“Model No. RM G0210.250.D/DC RM G0210.500.D/DC”
Source: bafang-e.com/Uploaded/Labels/BAFANG_Workbook_OEM_2027_EN.pdf
Certification claims
- Certification claimed by the manufacturer
CE/UKCA
BF-DM-C-RM G0210-D-EN.pdf · retrieved by us 4 September 2026
“Certification CE/UKCA”
Source: bafang-e.com/uploaded/manual/BF-DM-C-RM G0210-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.