In a message dated 11/25/01 2:31:03 PM Eastern Standard Time, tony@stubbington.demon.co.uk writes:
> Can anyone tell me exactly when Columbus introduced the helical
> reinforcing ribs in the steerer tubes of its tube sets? I was surprised
> to find them in the steerer of my allegedly 1955 Cinelli Super Corsa.
>
The ribbing is in SLX steerer tubes, introduced after the early 70's I think. It added strength to the SL (Super Light ? Stupid Light ?) tube sets. Is the any helical ribbing found elsewhere on the tubeset ? Earlier Columbus tubesets weren't labeled SL or SP or SLX, just "Columbus", like on my 1975/76 Trek 910. No helical ribbing on this frame, if I remember correctly, even though it is Very Large.
A replacement fork ?
Glenn Jordan - Durham, NC