33. How to Adjust a Threadless Headset
Learn how to check the adjustment of a threadless (Aheadset) and align the handlebars.
In today’s tutorial, we’ll learn how to adjust a threadless headset, otherwise known as an ‘Aheadset. For this job, you’ll need either a 5mm or a 6mm allen key, depending on your stem.
To loosen the stem, simply turn the allen key on top counter-clockwise a few turns. Don’t remove it completely. Then loosen the two bolts on the side. Now your stem should turn freely.
To check if the headset is tight, lift the front of the bike off the ground. The handlebar should rotate freely and fall to one side or the other. If it doesn’t, you’ll have to loosen the top bolt a little bit and try it again.
To check for play, hold the front brake, place one hand on your headset, and rock the bike forward and backward. If the headset is loose you’ll feel it, and you’ll have to tighten the top bolt a little bit.
Once the adjustment is set, check the alignment. I find it easiest to line up the stem with the front wheel while you’re sitting on the bike. Once the handlebar is straight, tighten the two stem bolts and check the adjustment again just to be sure.
Hi I'm new to the forum and need help. I bought a used year old Trek 7300 and then bought a headset extension to give me a more up right riding position. I'm 67 and bending over is no longer an option. Anyway to get to the point I installed the headset extension and after tightening the headset bolt there was still a little play in the headset. I'm pretty sure I tightened the headset bolt before the clamp bolts but after several attempts I can't say for sure I didn't forget something along the way as I said I'm 67. Anyway after several attempts I thought well maybe I just need to tighte... Read more >>
Hi guys, I have a 2001 Gary Fisher Marlin. I took off the stem on my bike and didn't realize as the fork was loose the bearing fell out and broke. I'm not sure what size they are and the orientation it is suppose to be. The top bearing is still there. All i know is the bearing is in a retainer that is all. Any help would be amazing. Thanks... Read more >>
Hey there, I'm trying to raise the handlebars on an old ladies Schwinn Traveler. I loosened the bolt to raise the handlebars, and once the handlebars are at the desired height the bolt will not tighten down anymore. I've been searching threads on here and learned there is a nut in the frame that I'm assuming I'm not catching anymore. Does anyone have any advice as to how I can raise the handlebars and still be able to tighten the bolt down? Or how to catch that nut so I can tighten the bolt? Any and all suggestions would be greatly appreciated. I will upload some pictures when I get hom... Read more >>
Hi, Can anyone tell me what type of headset I have. If so any advise on how to service or videos on how to do so would be a great help. Cheers, Geoff... Read more >>
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Please Help! I'm trying to overhaul the headset on this old English roadster (circa. 1938-45) I'm at my wits end and I just can't get either the stem or fork out. I loosened the stems tightning bolt and gave it a tap with the hammer. The wedge becomes and loose and drops into the head tube. However the stem won't even budge. I can loosen the locknut but there is no hope of unthreading the adjusting race. The tightening bolt is the only think I can remove. I don't want to start tapping this with a hammer worrying that I coud be stripping something. Any suggestions?... Read more >>
Hello, I have a road bike with a modern stem (threadless) & head set (1 1/8 size). I bought it used and have been experiencing an awkard behave of my road bike in relation to steering: the steering seems rather loose. I picked a 5mm allen key and tightened stem via clamp bolts and cap bolt. But the steering is very loose. It comes more noticeable when pedaling with hands of handlebars or when holding the bike (and it keeps tumbling down). Any suggestions on what it might be the problem? Thank you in advance. Regards, Pedro Portela (Portellini)... Read more >>
I wonder if anyone has ever come across a spring loaded headset. I just bought a Motobecane Grand Jubile and when I turn the handle bars it snaps into set positions. I assume it is spring loaded to do that. I've never seen anything like it and was wondering what the benefit is. I'm also about to refurbish the bike and I'm afraid of what I'm going to find if I take the headset and fork off. Thanks!... Read more >>
I'm overhauling the headset on this crusty Supercycle. Should there be this much space between bearings? Should I fill in races with more bearings? I'm also curious as to the size of the bearings, they are definitely smaller than the 3/16" and I'm not familiar with them. Thanks!... Read more >>
Ok I decided that I would like to get the same set up that Alex has on his GT Triple Triangle shown on his video "How to overhaul a Threaded Headset"! I am not sure of what that set up is called but I really like it. Unless someone has a better idea with out me having to buy a 200.00 facing and reaming tool to go threadless. Integrated headsets are out of the question too lol.... Read more >>
I just picked up an inexpensive Schwinn Moab 3 to tinker with and get back into cycling. The seller said that the bike is from around 1995 and, overall, it's in good shape. I'm a big guy and the fork is too soft for my liking, but I have a nice Planet X rigid fork with a 1 1/8 threadless steerer. The current setup is a threaded steerer, but looks awfully big for a 1". http://www.sheldonbrown.com/cribsheet-headsets.html I found this on a search through the website. I plan on taking the steering apart to grease the headset bearings, so I want to see if I can swap in the appropriate 1 1/8 part... Read more >>
I have seen the integrated headsets and was wandering what anyone or everyone thought of them? Are they better then the other headsets? I think not with a good article from Chris King.... http://chrisking.com/files/pdfs/Int20HeadsetsExplained.pdf... Read more >>
HI My name is Ryan and i own a specialized demo 7 with a 1-1/2 head set and i have a pair of 2009 888 and the steer tube is 1-1/8 what kind of headset could i use... Read more >>
Hello all, I need help adjusting my bike headset. It's loose at the bottom nut. It shakes back and forth. How do I go about fixing it? What tools do I need? The top of the headset opens with a 5.5mm allen key. I was able to open the top but I don't know what to do from there. Thanks [attachment=3269] [attachment=3270]... Read more >>
I'm working on a bike and I'm wanting to convert the headset from threaded to threadless. I don't know anything about threadless and I've disassembled the old threaded headset which was 1". What do I do?... Read more >>