1998 Cannondale CAD3 F1000

[Zachariah]

Any bright ideas on how to bring the rear derailleur hanger back to normal?

 

[black lightning 1987]

How far have the dropouts been spread? I would probably make some sort of wooden structure to spread the load across the left side stays, with a fulcrum projecting to the bend in the drive side seat stay. Then pull the dropouts together with a piece of all thread. May not work, could kink the seat stay at the bend.

 

[Zachariah]

How far have the dropouts been spread? I would probably make some sort of wooden structure to spread the load across the left side stays, with a fulcrum projecting to the bend in the drive side seat stay. Then pull the dropouts together with a piece of all thread. May not work, could kink the seat stay at the bend.

Drive side dropout has about 8mm of misalignment/deflection. Your idea of using wood sounds very viable. I am considering fabricating two long, "tubing blocks" made of Pinewood and gently vise the bent stay back in, using strategically-placed long bolts and washers.

 

[black lightning 1987]

Yes, if you could cut a concave that matched the diameter of the stay in a piece of wood, it would be less likely to deform the tube at the bend when straightening. Easy to do with a router or shaper.

 

[Zachariah]

Cool!

 

[MEENI]

Heat it up a little whe you do so
Just enough so the paint doesnt crack (normal hairdryer will do it)