Dazco,
You have a star fangled nut on your current bike. It is a part of a threadless headset that comes on nearly every bike now, and is definitely on your stumpjumper. You should be able to find a diagram on the internet (Like in the fork chapter of Barnett's that can be found at the top of the topic list in this forum) that would show you what you're talking about. You might want the LBS to play around with installing the fork for you if you don't have any experience with it, though I have heard that with the steerer cut to the right length, it's not bad. You shouldn't have any problems installing the fork on your bike unless that amount of travel is radically different. Some say that a range of 20mm either way won't radically effect handling, but I like to stay with the same amount, or real close.
-Moab
Last edited by moabrider47; 03-16-03 at 06:04 PM.