More Tech - Truing Head Tube Alignment

[dougfisk]

In the past, I have just discarded frames with the head tube out of alignment. But recently I decided to try and save this frame. If you read the fancy shmancy service manuals, this is not supposed to be possible.... Nevertheless, here is my high tech head tube alignment fixture.

To operate - you press on the top region of the seat tube with your foot to apply a twisting force to the front triangle.



Another view ...Maybe I should be embarassed to admit - I went back and forth from side to side 4 or 5 times until I got it exactly right!



After getting the head tube in alignment, I aligned the rear triangle as I have illustrated previously.



More to come.

 

[LukeTheJoker]

Love it!
This is my kind of engineering!

Luke.

 

[mikeeebikey]

From my own experience put some old cups in the head tube before straightening.
Also, no matter how well you measure it'll have to be ridden to test, ridden at different speeds, fast speeds, wear old undies.....

 

[texon]

Is there any other kind of undies ? :wink :lol:

 

[junknutz1975]

I dig the corvette bench vice! :wink:

 

[jerrykr]

do you need an early corvette for this to work, or will a newer one work?

 

[Skipton]

I dig the corvette bench vice! :wink:

:mrgreen:

do you need an early corvette for this to work, or will a newer one work?

:lol: