How to Replace a Bicycle Stem - Threadless
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- čas přidán 18. 06. 2024
- This video covers everything you need to know about removing and installing a threadless stem from a bicycle, including choosing compatible components, proper spacer orientation, and final centering and headset adjustment.
Questions or comments? Leave them below!
See all our bar & stem videos in our Handlebars & Stems playlist ▶︎ • Repair Help: Handlebar...
Video contents:
00:00 Preliminary Information
03:07 Removal
04:21 Installation
➤ Tools & materials used:
• RR-12 Tape Measure - www.parktool.com/product/tape...
• Appropriate hex/Torx®-compatible wrenches - www.parktool.com/category/hex...
• Torque wrench/driver - www.parktool.com/category/tor...
• PPL-1 Polylube Lubricant - www.parktool.com/product/poly...
• TLR-1 Threadlocker - www.parktool.com/product/medi...
• Supergrip Carbon and Alloy Assembly Compound - www.parktool.com/product/supe...
• Toe Straps/Zip Ties
• Rags
For a text-based walk-through of this process: www.parktool.com/blog/repair-...
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➤ Fix It:
Did you know that Park Tool is the #1 resource for bicycle repair education?
• Visit our CZcams Channel: / parktool
• Visit the Repair Help section of Parktool.com: www.parktool.com/blog/repair-h...
• Check out The Big Blue Book of Bicycle Repair: www.parktool.com/product/big-b...
➤ About Park Tool:
Since our founding in 1963, Park Tool has been the leading name in bicycle tools. Our CZcams channel is an extension of our mission to be the ultimate resource for mechanics and riders of all skill levels. Here you will find comprehensive repair help tutorials for a wide range of components and processes, as well as troubleshooting guides, tips and tricks, and information on the latest Park Tool products.
➤ More Bars & Stems Repair Help:
• How to Wrap Handlebars for Road Bikes - • How to Wrap Handlebars...
• How to Replace Flat Handlebar Bicycle Grips - • How to Replace Flat Ha...
• How to Cut Bicycle Handlebars - • How to Cut Bicycle Han...
• How to Replace Bicycle Handlebars - Flat Bars • How to Replace Bicycle...
• How to Replace Bicycle Handlebars - Drop/Road Bars - • How to Replace Bicycle...
• How to Replace a Bicycle Stem - Quill Stem - • How to Replace a Bicyc... - Jak na to + styl
If you don't have a micrometer to measure diameter on the parts, take a crescent wrench, adjust to the tube you are measuring, then place that over a ruler to gauge the diameter. Upvote this comment to help people!
Or buy a $10 or cheaper plastic vernier. I've had mine for at least 25 years, they're broken but I still use them. For super critical stuff I have a micrometer. The shifter trick is just too povo. Lol . 😆
Never thought of that. Thanks!
I stopped riding 23 years ago when kids arrived, now my son and I are back into it- with old school and new bikes. Now a lot of the tech has changed- but Park Tool is still on top of it! I appreciate the great tutorials.
Migrating from a quill stem bike from '98 to modern steering tube assembly. This is perhaps the best instructional video I've ever seen on youtube about anything... terrific and comprehensive job!
evergreen tutorial for newbies like me...planning to buy stem extender to make my handle bar higher, but after watching this i just install the stem in down position..simple & save my money!
Really appreciate this series of professional bike maintenance videos from Park Tool! So hard to find a source of reliable expert information on the subject these days.
I know everyone have been praising this video, but I still need to leave a comment praising it. What a perfect tutorial video! Bravo team
I recently purchased a bike with this kind of stem and had NO idea how it was put together, nor how to adjust things. This great video is so helpful, thorough and really well presented. Many thanks!
The ruler is genius struggled for years with this not anymore keep the good work up
Hi, thanks for this, really helpful for me as a beginner maintainer at 53! You are helping prove it’s never to late. The format, structure and commentary is ideal.
Great tips! Toe straps as holders/restraints is brilliant!
Thank you so much for your tutorial videos. Thanks to this one I was able to shorten my stem on my own - now my Cannondale CAAD 4 fits me way better.
Of course I used Park Tool tools for doing it, they feel great!
These videos are SOO helpful! thankyou!
Fantastic tutorial videos. Seriously, every question that pops up always get answered at some point in these videos. Top notch content!
thank you for your work in this material !
Thank you for this video. It is just what I needed as a beginner on this topic. Very understandable with the dialogue and visual together.
Many road bikes do not use the small 5 mm spacer under the top cap. The reason is the expander plug is put in and the extension bar then slides up 3-4 mm pass the top of the plug metal head. This allows for the bottom of the expander plug to protect the carbon steerer on the bottom and top bolts of the extension bar. Always use a 4 cm expander plug this way you can the 5 mm spacer, a smaller expander plug is really for slammed stems, also check the inside of the extension bar and make sure it is smooth and has no rough edges on the clamp hole area. I have seen tons of high end road bikes where there is a 4 mm gap on top and the cap tightens with no spacer underneath it.
this is super helpful, thank you!
Thanks for the videos. It really helps me when i changed my stem and handlebar position. 👍👍
You guys are awesome I can’t tell you how much your videos has helped me thanks for your effort with your videos
these are wonderful and never get old
This is really, really insightful. Thank you for uploading this video!
Saw the email notification, jumped right into the video. Anyone else planning on binge-watching Park Tool videos this week?
Yes but Calvin Jones is the best.
Excellent professional quality video on an important subject.
Amazing video through and through.
Excellent easily understood video.
Excellent video. Very detailed and clear!
Thanks a lot for doing these videos! So helpful with the visuals
Another very helpful video! Thank you
Best bike repair videos ever 👌🏻
Thank you! You saved the day for me, and my bicycle is still in one piece!
I found this vid really useful credit to you guys
Thanks, this helped me along.
Very informative thank you
Clear coherent explanation and procedure of how to complete this task. The down arrows. Could be from authors of the abundant; poorly conceived videos or bike shops attempting to limit knowledge.
Great! I was having a lil wiggle in mine..salutes from phoenix,az
Excellent and professional
Super helpful. Just changed mine for the first time, thank you!
Very helpful 👍
Thank you sir for good video nice
Sooo good. What you need to know.
Very useful ..thanks
as always - top notch!
Awesome channel.very helpful
Thanks. I found an extra shim on the top and moved it to the bottom for added height.
Great explanation dude... very usefull.. 👍👍
Thank you
I like the ruler trick to align the fork & handlebar.
wow very informative, never knew those small details
Great content
I like the background tune
Awesome & Thanks :)
I like your videos 👍
Bonus tip to help make sure that steerer tube is tight: Place the front wheel snug against a wall and firmly (not violently) pressing down on the stem while sitting on the frame top tube. This should sit everything tightly before tightening the top screw.
Thanks for these videos. Please ignore the ignoramuses.
Thanks
The ruler trick rules!
Love this Animal Crossing track.
I did that accordingly instruction before I seen that :))))))
Make a video on changing the derailleur shifters and how to fix front derailleur barrel adjuster if doesn't rotate clockwise or anticlock wise
I have a folding bike with telescopic stem. Would appreciate a video on those.
The video was very helpful, thank you. I have a question. Is it okay to have a gap of about half a centimeter in between your two stem pieces? I ordered the right size but they are not coming together around the handle bar with a tight seal.
6:10 - 6:31
Pls make a video for replacing the suspension forks.......
I've been doing it right all along! Go me!
I like☺
Is there a rule of thumb for the space between the stem and the faceplate? After putting on a new stem my space is about 5 millimeters but the bolts are long enough to be quite inside the stem.
So grease or threadlock on faceplate bolts? My bike had what looks like blue loctite on the faceplate bolts.
If the bolts were clean/dry, with nothing, grease is good thread preparation. You likely had an aerobic thread locker, installed dry. Run them as they are, without grease. The dry locker provides some prep for the thread.
A good job I watched this video; I checked my front brake hose & it's stretched to the max already :-(( won't accommodate a steeper stem.
@Park Tool
Is there a desired steer tube length height? I'm 5.5" my new bike frame is 13" takes 700c wheels so, how high should my handlebars be adjusted to the steer tube?
Steer tube height is mostly personal preference. Longer will offer more adjustability. Shorter may give you the visuals or fit you are looking for. Just depends on your fit and where you need to be positioned.
@@parktool Hello there i need your help in something i have a question about my bike it’s a Scott ransom 910 2021 you see when ever i wash my bike with muc off soap and water i get a creeking sound from my headsets and it was so annoying that I couldn’t find what’s causing this till I opened the headsets and found out that when ever i wash it the grease from
The headsets bearings fell of completely cause of the water and starts creaking like crazy but wait why the grease is dropping after i hose my bike its because it’s not a waterproof grease but that shouldn’t fix the problem that means i have to put fresh grease every time i wash my bike till I found out that the headsets that came
with my bike from the factory it doesn’t has a washer completely like no washer whatsoever now my question is this and I think it’s the solution for my problem
I’m willing to replace the headsets and the stem just to buy a headsets that has a washer i got
In mind cane creek branch their the best I think anyway
Since I have a square shape of headsets and square shape of spacers I’m forced to buy a new stem and a pare of new headsets that comes with a washer my only problem is that I don’t know if their is a measure I should take in min when ordering a new headsets with rounded spacers could you help me I really appreciate that thank you waiting for your reply
thank
I got a new race face chester stem... And a torque wrench... On the sides of stem is written that you need to tight bolts to 12 Nm (steer tube bolts). Im little bit confused because in the video you said that a typical effort is about 4 to 6 Nm. Thank you.
Go with the manufacturer. The 6Nm is more common on the four bolt face plates for the bars. Again, manufacturers rule....as long as it makes sense.
I have a Giant City Escape that I would like to bring the Handlebars UP 2". What are my options ? Please Advise. Ted.
maybe... new head that's angled up... maybe restack the spacers...
4:45 I had some play cause my steerer tube was about 1/4" above my stem... I didn't think that this could cause it, but I was wrong! threw another spacer in the mix and problem solved!
Hello sir
is a torque key needed if my bike is all aluminium?
Đẹp thích .
Hi ParkTool. I need some advice on my stem. I just bought a renthal apex stem. While installing to my rockshock recon fork, i realized it was too tight to enter. So I used a rubber mallet to knock it in. But after one ride, i noticed there is some play on the headset. Can i get an expert advice on what should i do?
It sounds like you may need to add another headset spacer. Loosen the fixing bolts on the stem, add the spacer then tighten the top cap and i'm guessing you will be off to the races. Hope this helps!
Can I go from a thread to non thread? If so is it the same procedure?
Grease or thread locker... Should the torque value be reduced 20% when one of these lubricants are applied?
Check with your manufacturer for greased or non greased specs. Typically these are spec'd with grease but some models are spec'd dry. Very very few though. Typically only if Ti hardware is involved.
I've a nobrand stem without any indication about size. How can I measure it? Should I consider the internal diameter with the bolts fully tightened?
If you remove the faceplate and measure from the diameter of the half round section what number do you get?
@@parktool 25.2 more or less, measured with a classic caliper
How to make handle and wheel straight?
How many types stem available??how to measure size ??
My old stem had a little plastic spacer that filled the compression slot on the rear of the stem. It has two holes for the bolts to pass through. Is this just an optional, aesthetic thing? My new stem didn't come with one and I can't see any images of other stems using a spacer, they just have a gap it seems.
There are stems that do this and is part of the design. If it is there, leave it in place.
can you enlighten me on one thing? you say stem/spacers have to be a lil bit over steertube, why? what will happen if it's flush or below??
The reason for the stem or spacer to be above the steer tube is to allow the top cap to do is job. The top caps job is to pre load the headset bearings to get rid of any potential for play. If the spacer or stem is below the steerer then it will be near impossible to get a correct headset adjustment.
@@parktool spot on thankyou! changing headset soon and i just wondered the ramifications of it being short,
Installation in written form:
Set bike on ground, ensure full stack is entirely seated.
Set stem height. Stem or spacers should be ~3mm above the top of the steerer tube. (For carbon forks, steerer tube MUST go entirely through stem. Use spacer on top to get the 3mm)
Grease on topcap bolt, install. Snug down, tune later.
(Carbon bars - put on assembly compound)
Grease OR threadlocker on faceplate bolts. Thread in bolts. Tighten lightly but evenly according to stem design.
Set bar roll, center bars.
Fully tighten faceplate bolts (4-6Nm) in X pattern.
Snug topcap down until there is slight resistance. Bars should turn with almost no resistance. If there is, loosen by 1/8 turn at a time.
Straighten handlebars to fork.
Snug pinch bolts.
Test for play in headset by holding front brake and rocking forward and backward. Feel for play at headset. If there is play, loosen pinch bolts, tighten topcap 1/8 turn, retighten pinch bolts and try again.
Tighten pinch bolts (4-6Nm).
I can’t unscrew my top stem cap, it just keeps turning and turning and won’t completely unscrew.... any tips?
I’m trying to eliminate all play in fork and headset
You should include the bike models shown in the video, that kona looks damn sexy!
It's a Honzo ST (legible on the top tube at 7:33). 2018 colors, I think.
Lmaoooooo @14-15 seconds. Who made you look? :p
on my stem, theres some sort of cover that doesnt let me access any bolt or anything at the top. what can i do in that case?
Some stems have covers like that. Those covers should be able to be removed to allow access to the stem bolts. Send an image to tech@parktool.com if you would like a better idea on how to remove the cover.
Aaroneki you can lift/pry that small center rubber piece with your fingernail. Just don’t use sharp metal tool as you will scratch the bikes finish.
Can I leave more than 3mm between steer tube and the stem (stem above the steer tube), and by how much?
My stem is too low and additional 5-7mm rise could be enough for me. Would that be a hazard?
I could get the stem riser, but that is way too high even if I point the stem down.
More than 3mm is not advised. Its hard to say if or when you will ahve a problem going higher than the 3mm but it is not advised. It may be safer to look for a bar with a higher rise or a stem with a higher rise.
Thank you.@@parktool
Hello....what do you do if the bolt holding the stem top cap doesn't come off? The bolt is free spinning. Thanks
If the steerer is metal then the star nut has gone bad. Unfortunately it may be best to drill the head of the bolt out and then use a punch to pound the star nut out the bottom and replace. If the steerer is carbon then you may just need to use one size smaller hex key to tighten the expanding plug and then loosen the top cap.
If I’m south of the equator, is it “lefty tighty, righty loosey” or is it still “righty tighty, lefty loosey”?
No, you're just upside down.
South of the Equator also; it's righty tighty, lefty loosey unless it's a left hand thread
Quick Q - if adjusted correctly, with play removed - and accounting for correct procedure + 3mm gap, should the spacers be able to rotate (with high effort)?
They will rotate with a heavy amount of effort. But should not be anywhere near easy to rotate.
@@parktool Hi - great thank you, this was the missing piece of the puzzle for me!
Is it better to switch the stem rather than using shims for a mountain bike?
It is better to replace the stem. Typically an adaptor is used when parts are not available or when money is looking to be saved.
wht size of l keys a need for th clamp bolts please answer
That can vary with the brand. 4, 5 and 6mm are seen. The T25 torx is also seen.
Maybe a stupid question at 5:59: Are you applying SAC-2 fibre grip to the bolts (or is that your PPL-1 grease)? Wouldn't this increase the friction resulting in less axial tension? Meaning you need more torque to achieve the same tension - which is what you wouldn't want if one of the components is carbon? I thought SAC-2 would only be applied to clamp surfaces.
That is PPL-1 and not SAC-2 being applied to the bolts. Do not use SAC-2 for threaded applications.
I can picture myself removing the top cap & having the forks fall to the ground, before I realize that I should've secured the forks in place
In case I change my stem from a long one to a significantly shorter one (e.g. from 100mm to 50mm) is excess cables' length going to affect brakes and shifters setting? Thanks to anyone who can answer.
Going a bit shorter like this should not prove to be a problem. Going to a longer stem is more of a concern.
@@parktool Thank you, I'll let you know what happens
@@Nessunego So what happened? I'm considering doing the same, not knowing what to expect.
@@sherwood5103 I did it and nothing changed
@@Nessunego Ok. Thanks! That's a relief.
Sir please tell me how to remove stem when alen screw is stripped
I am not able to remove the screw
You will need to remove the screw by either drilling it out or using a bolt extractor to remove the bolt unfortunately.
Or you can try hex key one size bigger
You can put outward pressure as you turn the bolt. It will back out.
My stem doesnt have a bolt on the top cap?
Can i do it without a torque wrench?
You sure can. Tighten the bolts evenly till the bars do not rotate on either axis. You could also use perceived torque.
@@parktool thanks👍
my fork doesnt have anything at the top jjust normal metal or whatever what does that mean
Is your fork new?
@@parktool no i bought a second hand fork off ebay
what if my headset doesn’t have a cap and is just a hole with a strange hex shape going through the fork
What bike is this on?