Uploaded July 2021 | Updated September 2026, 2 weeks ago
In this clip we compare our two favorite small geared hub motor systems; the G311/G310 series from Bafang and the DGWX1/DGWX2 motors from Shengyi (which we've abbreviated at Grin to SX1/SX1). Both are well engineered geared hubs with helical cut gears, good serviceability, and punchy enough performance for pedal assist ebikes. But they differ in their power and torque capabilities.
If you have lots of hills or you transport things with your bike, then the smaller G31 will likely be underwhelming and we would recommend the SX motor system. We have seen many people overheat and damage their G31 motors by pushing them beyond their capabilities. For commuters who pedal a lot and just like a boost, the smaller/lighter G31's are pretty much perfect.
More detailed info is available here:
ebikes.ca/product-info/grin-kits/bafang-g310-g311.html
ebikes.ca/product-info/grin-kits/shengyi-sx-geared-hubs.html
Pricing is on the store page at the end of the links above. We don't post prices in our videos since that changes over time and we want the content to stay relevant. In general the Shengyi motor is a bit less expensive in spite of also being more powerful.
Video Content:
0:00 - Intro
0:54 - Similarities (Freewheeling, helical gears, disk)
1:24 - Serviceability
2:01 - Bike Compatibility
2:24 - Combined Speed/Temp Sensor
2:35 - Size and Weight
3:02 - Internal Construction
3:47 - Noise Levels
4:12 - G31 Limitations
4:54 - Power
5:35 - Axle Design and Torque Arms
7:33 - Summary
In this clip we compare our two favorite small geared hub motor systems; the G311/G310 series from Bafang and the DGWX1/DGWX2 motors from Shengyi (which we've abbreviated at Grin to SX1/SX1). Both are well engineered geared hubs with helical cut gears, good serviceability, and punchy enough performance for pedal assist ebikes. But they differ in their power and torque capabilities.
If you have lots of hills or you transport things with your bike, then the smaller G31 will likely be underwhelming and we would recommend the SX motor system. We have seen many people overheat and damage their G31 motors by pushing them beyond their capabilities. For commuters who pedal a lot and just like a boost, the smaller/lighter G31's are pretty much perfect.
More detailed info is available here:
ebikes.ca/product-info/grin-kits/bafang-g310-g311.html
ebikes.ca/product-info/grin-kits/shengyi-sx-geared-hubs.html
Pricing is on the store page at the end of the links above. We don't post prices in our videos since that changes over time and we want the content to stay relevant. In general the Shengyi motor is a bit less expensive in spite of also being more powerful.
Video Content:
0:00 - Intro
0:54 - Similarities (Freewheeling, helical gears, disk)
1:24 - Serviceability
2:01 - Bike Compatibility
2:24 - Combined Speed/Temp Sensor
2:35 - Size and Weight
3:02 - Internal Construction
3:47 - Noise Levels
4:12 - G31 Limitations
4:54 - Power
5:35 - Axle Design and Torque Arms
7:33 - Summary
