RE: [CR]Reaming/Honing Fork Steering Tube

(Example: Racing:Jacques Boyer)

Subject: RE: [CR]Reaming/Honing Fork Steering Tube
Date: Sun, 12 Mar 2006 21:53:11 -0800
Content-class: urn:content-classes:message
Thread-Topic: [CR]Reaming/Honing Fork Steering Tube
Thread-Index: AcZGXIygQoLh+P/XTC681R2DJ3dw5gABLWwg
From: "Mark Bulgier" <Mark@bulgier.net>
To: "CR" <Classicrendezvous@bikelist.org>



> Rodney wrote: I recently had the fork on my Colnago Super
> rechromed and the inside diameter of the steerer tube is now
> too small to easily fit the stem.

I seriously doubt chroming has reduced the ID of the steerer - the problem must me something else. Most likely I'd say, the fork was dropped and landed on the top of the steerer, peening it over a bit at the very top.

Due to properties of electromagnetism and the sheer volume (or lack of it) inside the tube, chromium ions will be very strongly inclined to deposit on the outside of the tube. Any that stuck to the inside will be predominately close to the top.

A half-round file, followed with the flap-wheel if necessary, should have a 22.2 mm stem going in good as new in no time. A reamer would also work, but they are more expensive tools, and not necessary in this case I bet.

Mark Bulgier
Seattle WA USA