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View Full Version : Tadpole steer tube alignment jig



madmike
09-13-2009, 03:59 AM
I made this jig to make sure my steer tube axis intersected the center of my tire surface.
A random spring holds the tube into the angle, and the J-shaped pointer telescopes in and out
and can be tightened in place. Took about 20 minutes to tack it all together, and another 5
to calibrate the pointer using a long piece of 1-inch rod to ensure the pointer was indicating
correctly to the the tube axis.

Sorry, low-res cellphone pics.


Pointer indicating tire center
http://i204.photobucket.com/albums/bb267/madmike_024/1118081149.jpg



Steer tube held with spring
http://i204.photobucket.com/albums/bb267/madmike_024/1118081147.jpg



Overall view
http://i204.photobucket.com/albums/bb267/madmike_024/1118081145.jpg

Blaxmyth
09-13-2009, 04:54 AM
Brilliant idea! That was something that I thought might be problematic when I get to that stage of the build, but you've solved it so neatly. Thanks for sharing.

SirJoey
09-13-2009, 06:59 AM
Dang, I wish the pics were a little bigger.
I can't tell what I'm looking at. :(


http://img384.imageshack.us/img384/7131/sirjoeysigmedij1.gif

trikeman
09-13-2009, 09:16 AM
dittos on telling what is going on with the pictures sj. It sounds like a great idea though. Maybe someone who can see it good enough can draw a picture of it.