Can steerer tube be made longer?

[Jimmy2021]

Hi everyone, back from a trip to Italy, I was talking to my cousin, a keen road cyclist, and he said they extend steerer tubes all the time by threading them.

He drew this for me...


He said that once tightened with red thread lock, it never comes out again.
Steel steerers can also be welded after being screwed in.
I understand that road bikes don't have that many vibrations compared to MTB, but to me it sounded like an easy and safe plan.
Maybe I would use epoxy adhesive for a permanent job, but apart from that ...

What do you think?

 

[novocaine]

Hi everyone, back from a trip to Italy, I was talking to my cousin, a keen road cyclist, and he said they extend steerer tubes all the time by threading them.

He drew this for me...
View attachment 994930

He said that once tightened with red thread lock, it never comes out again.
Steel steerers can also be welded after being screwed in.
I understand that road bikes don't have that many vibrations compared to MTB, but to me it sounded like an easy and safe plan.
Maybe I would use epoxy adhesive for a permanent job, but apart from that ...

What do you think?

depends on the wall thickness of the tube. you have to half the thickness to allow fit then remove the material for the thread (Assuming a 1.5mm pitch). that doesn't leave a lot of material.
but yes, in theory this is doable.