Join Date: Nov 2000
Location: New Orleans, LA
Yeah, it is! I am using quill to threadless adapters on 4 of my bikes. I like it because it took me a while to get the reach dialed in, and threadless stems with 2-bolt bar clamps are easier to swap than quill stems. In fact I have several stems in different lengths. You are welcome to borrow some if you want to try different lengths.
If it ain't broke, mess with it anyway!