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Threadless/Threaded headset-stem question(7 posts)

Threadless/Threaded headset-stem questionsgray8110
Dec 12, 2001 2:55 PM
Just a dumb question here I've always been curious about.. what is the benefit of a threadless headset/stem over a threaded one?? I've got a rain bike and my regular bike. The rain bike is older and lower end and has a threaded headset and stem, my regular bike is threaded. Is there any real difference? Obviously there is a performance difference in the bikes but nothing that isn't attributable to the fork or headset being of higher quality..

re: Threadless/Threaded headset-stem questionRusty Coggs
Dec 12, 2001 4:50 PM
Both HS perform the same function. With threadless,on road bikes, you can get significantly lighter weight,at a cost, by going to an all carbon fork and very lightweight stem.
re: Threadless/Threaded headset-stem questionmclements
Dec 16, 2001 4:30 PM
The only real difference is that a threadless headset can be adjusted with a 5mm allen wrench, where a threaded headset usually requires 32mm flat wrench and a separate crescent wrench. Since you probably adjust your headset about once per year, this boils down to basically no difference at all.

The extra ounce or two you save with a threadless headset will improve your performance about as much as shaving your head will (combination of improved bare scalp aero and less hair weight).
re: Threadless/Threaded headset-stem questionohio
Dec 18, 2001 1:21 PM
It also makes for a stronger/stiffer stem, a system that doesn't loosen with miles, a lower stack height, and the ability to use alloy steerers, all at NO additional cost. In fact, it's cheaper because warehouses and dealers can stock fewer steerer lengths, and don't have thread forks, and can swap forks much more easily from frame to frame, and the headsets themselves are cheaper/simpler to manufacture. That being said, it's harder to change stem height mid-ride, and the differences aren't glaring, they're fairly small.

Not worth upgrading to unless you're already buying a new fork or bike.
re: Threadless/Threaded headset-stem questionmclements
Dec 20, 2001 9:23 AM
I've seen just as many loose headsets whether threaded or threadless. Neither has been a problem for me. What makes you think threaded headsets are more prone to loosening with miles?
re: Threadless/Threaded headset-stem questionohio
Dec 20, 2001 2:38 PM
b/c in a traditional system the threaded cone and lockring can be loosened over time by the turning movement of the seals and bearings. In an aheadset the preload component (the topcap/screw/SFN) only experiences axial loads. And if it does somehow loosen, all you need is a 5 mm allen wrench, so people are better about keeping it properly tightened.
re: Threadless/Threaded headset-stem questionmclements
Dec 21, 2001 9:49 AM
I see your point but if the upper bearing cone is properly tightened against the locknut, then this will not happen. I have bikes with both kinds of headsets. When adjusted properly none of them come loose even after thousands of miles.