Originally Posted by
Barrettscv
I've heard of steerers being lengthed by cutting the steerer in the middle and welding a longer threaded section using an inner sleeve to strengthen and align the new section. This reduces the risk of failing at the crown and also means no repainting.
This could work with a long steerer, but the butt joint and inner sleeve will be above the internal taper and that will limit the length of the steerer the quill stem can be inserted into. Most steerer tubes are butted (2.3mm walls) at the fork crown end and have a 30mm taper between the 50mm butt and the top section with 1.5mm walls. Also, the wall thickness of the threadless steerer where the butt joint is will have to be the same as the wall thickness of the threaded steerer for this to work.
