better than star-flaged nut unless you have an aluminum steer tube

1)little rubber thing breaks
2)hard to adjust
3)way more complicated than necissary
4)heavy
5)lots of adjustment needed due to slippage
6)gets dull & doesnt work
7)cuts up steerer tube inner wall

good idea poor excecution. fits poorly with my Mars. Head lock better work. Otherwise I will have no way to tighten my headset

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star flanged nut (also trash)

Ease of installation, ease of adjustment, great colors

better instructions

I got this when I went from a rigid fork to my Rock Shox Jett. Put it together easily by myself, and it was my first time working on the fork/headset. No problems. Held just fine even after I hit that car door. I would recommend it to anyone.

The Conix by FSA (Full Speed Ahead) is the best susbstitube for the SFN (star fangled nut) for the threadless headset. The SFN scratches and mars the inside of your steerer and does more damage if you want to remove it. The Conix is the solution. The expansion package inserts into the steerer, you tighten it with a 6mm alley wrench. After it's secured, a top cap threads down into the expansion package, pulling the headset tight. Unlike the Club Roost Wedgehead, this is a 2-step system. So, you make sure the expansion package is very tight first, before you attemp to thread down the top cap. It works extremely well. Cost: $10. Weight, about 30g more than a SFN. Plus, you get a nice alum top cap with carved in lettering.

might be good for bike that dont really go off road

I had to tighten it after every ride.Now it pops out after I try to tighten the cap,no matter how hard I tighten the wedge.
It leaves deep grooves on the inside of my steerer tube

waste of my money.dont buy it if you spend most of your time off road, you'll end up trying to tighten it over and over.might be good for pavement riders.I pulled mine out,Im gonna replace it with a azonic headlock.The damn thing left deep scars on my steerer tube.

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star fangled crap

The whole idea seemed silly. Star flanged nuts do work if you know how to install them. Don't use a screw driver!!!!!! That is only an excercise in futility. You don't need a special tool from park either. Put the cap on the bolt and screw the nut on the cap. Make sure to have the nut on so that some bolt threads are visible. Tap the bolt untill the nut grabs, place the cap on the steerer to center it and drive it home. It has ALWAYS landed dead center at the right depth with this technique. I was suprised to find out the Park actually makes a tool for this.Back to the review. A friend of mine, let's call him Fred (as in Flintstone), has all the mechanical skill of a troglodyte, decided to install his fork solo. Even with his chimpanzee skills he was able to do it no problem with a Conix. This is good because in his zeal to mount the fork by himself he forgot to put the lower race on the fork. Is that why the steering is rough?I still think it is a useless excuse for putting ano on a bike, but it does work. If he had to install a starflange I know he would have put in five or six with a screwdriver or steel punch. It does remove a possibly aggravating step from installing a fork. Its worth three chilies, it's only another bolt after all. Five chilies if you are Fred

What I like about this little darling is: 1)No stupid steel star fangled crap to get stuck in the steerer, and 2)No silly plastic cap that buckles when you try to tighten it. 3)No silly aluminum cap to replace the plastic one assuming that it will solve the problem. It loses 1 chili because it is a difficult fit for an aluminum steerer.

This is a great, easy to use product. It is easy to make adjustments on the fly with this too. Basically, it kicks the star flanged nuts butt!

Great alternative to the star-fangled nut.Maybe a little heavier, but it works. Comes in several anodized colors.At first I thought it wasn't great because my headset would come loose. Turns out it was my crappy stem. Remember, folks, this Conix thing, as well as star-fangled nuts, ARE FOR PRE-LOAD. The stem is what really keeps it all in place. I think it's better than the old star-fangled nut setup because it is fully removable, and reusable should you buy a new fork (not that star-fangled nuts are that expensive, though). FSA's conix is good, as are the FSA headsets.

How come I never thought of it first!!! Great product, well designed, works great. The inner threadded design really makes for easy adjusment if the headset comes loose.

Got it with a new FSA headset. I went back to the shop numerous times to get the headset re-tightened. It would not stay tight. One piece was a little larger than the diameter of the head tub. The stem would clamp onto this piece and not the h-tube. I could either grind it down (not very precise) or go back to the SFN. Went back to the SFN. I also replaced the FSA head set 1 year later.