Need help with drop outs

Nealh

Esteemed Pedelecer
Aug 7, 2014
20,882
8,517
61
West Sx RH
Bicycle drops outs are shaped diferently on the seat area and not the same match for a hub motor axle, typically one has to carefully file or use a dremmel type tool to remove some material from the drop outs.
Although your picture isn't very clear /sharp one can see the space /gap on the seat area , one has to very carefully remove material where the hub axle is in contact . Be careful not to leave a square angle , it must be a radius other wise it will fatigue and crack.
 

Kierandgaf

Pedelecer
Sep 19, 2022
30
0
Bicycle drops outs are shaped diferently on the seat area and not the same match for a hub motor axle, typically one has to carefully file or use a dremmel type tool to remove some material from the drop outs.
Although your picture isn't very clear /sharp one can see the space /gap on the seat area , one has to very carefully remove material where the hub axle is in contact . Be careful not to leave a square angle , it must be a radius other wise it will fatigue and crack.
Here is a better picture
 

Attachments

Kierandgaf

Pedelecer
Sep 19, 2022
30
0
Bicycle drops outs are shaped diferently on the seat area and not the same match for a hub motor axle, typically one has to carefully file or use a dremmel type tool to remove some material from the drop outs.
Although your picture isn't very clear /sharp one can see the space /gap on the seat area , one has to very carefully remove material where the hub axle is in contact . Be careful not to leave a square angle , it must be a radius other wise it will fatigue and crack.
Here is another
 

Attachments