Thingiverse
Front derailleur adapter (braze on) by Gambrinus
by Thingiverse
Last crawled date: 4 years, 7 months ago
This is an adapter to mount a braze-on front derailleur on a Mongoose Malus Fat bike. The Mongoose Malus comes with a single sprocket front, I wanted to piece together a triple. This bike has a bottom bracket size around 112 mm, so I had to offset the deraileur and the cable stay as well.
There are 4 parts here, put together into 2 assemblies, each assy clamps onto the seat tube separately. The cable stay has a spacer to keep it from moving up the tube if the cable force is large. Printing this as 2 assemblies makes the printing much simpler, and allows you to rotate the cable guide if you need a different orientation.
I printed mine in PLA at 40% fill, seems strong enough for my wussy riding, but I suppose you could print with nylon or at a higher fill density if you need it to be stronger.
Vitamins:
4 6mm bolts and nuts
2 3mm steel rods (20mm long) or bolts
I used this with a Shimano Sora braze on derailleur (Shimano Sora FD-3500 Front Derailleur)
There are 4 parts here, put together into 2 assemblies, each assy clamps onto the seat tube separately. The cable stay has a spacer to keep it from moving up the tube if the cable force is large. Printing this as 2 assemblies makes the printing much simpler, and allows you to rotate the cable guide if you need a different orientation.
I printed mine in PLA at 40% fill, seems strong enough for my wussy riding, but I suppose you could print with nylon or at a higher fill density if you need it to be stronger.
Vitamins:
4 6mm bolts and nuts
2 3mm steel rods (20mm long) or bolts
I used this with a Shimano Sora braze on derailleur (Shimano Sora FD-3500 Front Derailleur)