Originally Posted by
BobbyHull
I have an older Ibis tandem that has an Ibis stem which clamps onto a 7/8" (I think) tube welded inside the steerer tube of the fork. The fork uses a standard threaded headset, and the stem behaves much like a modern threadless stem. This was apparently a means to adding stiffness by avoiding a quill, and reducing weight. I need to change the stem for fit purposes.
Has anyone had this setup, and found a way to change the stem for something more conventional?
Thanks!
First I suggest using a caliper to measure the steerer tube that the stem is clamped to to see if it is 7/8 inch.
If it is a 1 inch then any threadless stem will work with a shim usually provided with 1-1/8th threadless stems for use with 1" steerer tubes.
If it is 7/8 then it may be possible to use two shims. I have never used two shims so make your own judgement about the safety of that approach. There are also shims made for handle bars that would appear to be for about a 1/4 " (6.4mm) adjustment. Not sure if they would work but may be worth looking at. They are designed to put 1" (25.4mm) handle bars in a 1-1/4" (31.8mm) stem.
http://www.universalcycles.com/shopp...s.php?id=39503