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Old 12-15-07, 11:33 PM   #1
darksmaster923
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stems

hay all, i was lookin to flip my stem so it would be well, lower, but i saw it was welded into the, um post thingy, and thats normal right. and i assume with that, i cant flip my stem..
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Old 12-16-07, 12:37 AM   #2
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Sounds like a quill stem. I so, you may be able to just lower it.
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Old 12-16-07, 12:45 AM   #3
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just found that out lol.
how will i lower it?
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Old 12-16-07, 02:19 AM   #4
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If it is a quill stem, just loosen the bolt at the top. You might need to whack the bolt to loosen the expander. Once it is free, just lower to the height you want. But if you have a smaller head tube, be careful. Many steering tubes are butted. If you lower the stem into this area, it can become loose and a nasty crash can occur.
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Old 12-16-07, 09:12 PM   #5
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Quote:
Originally Posted by SweetLou View Post
If it is a quill stem, just loosen the bolt at the top. You might need to whack the bolt to loosen the expander. Once it is free, just lower to the height you want. But if you have a smaller head tube, be careful. Many steering tubes are butted. If you lower the stem into this area, it can become loose and a nasty crash can occur.
its under the rubber thing, right?
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Old 12-16-07, 09:42 PM   #6
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Some stems have a rubber thing covering the hole the stem bolt is recessed into. Have you looked under the rubber thing to see what's under it?
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Old 12-16-07, 09:49 PM   #7
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Pull off the rubber thing and either put it in a safe place or throw it away, your choice. You'll probably need a 6mm allen wrench (also called a hex wrench, because it's hexagonal) to loosen the bolt. Crank it out (counterclockwise) a turn or two, then give the wrench a sharp rap with your hand or, if necessary, something stouter. Once that bolt is loose, the stem should move up and down and rotate side to side. Put it where you want it, then turn the bolt the other way to tighten it. Replace the rubber thing if you want, but some bikes don't use them so it's no big deal.
If you unscrew the bolt too far, the expander wedge (odd-shaped nut) on the other end may fall off and drop into the fork. If that happens, just turn the bike over and it should fall out.
Occasionally a stem will get corroded into place in the steerer so you can't break it loose. If that happens, post again.
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Old 12-16-07, 11:31 PM   #8
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once i figre out how to get the damn thing off
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Old 12-17-07, 11:48 AM   #9
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Originally Posted by Velo Dog View Post
Pull off the rubber thing and either put it in a safe place or throw it away, your choice. ...
I would save and reuse the rubber thingy to keep water out of your stem. The head of your expander bolt is probably clean & w/o rust because of the rubber piece.
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Old 12-18-07, 09:22 AM   #10
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i lowered it almost as low it can go. lowest makes a faint scratching noise when i turn it, so i raised it.
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Old 12-18-07, 03:19 PM   #11
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We knew you could do it.
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Old 12-18-07, 05:16 PM   #12
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We knew you could do it.
i doubt it
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Old 12-18-07, 06:14 PM   #13
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You didn't have to pay somebody to do it for you.
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Old 12-18-07, 07:40 PM   #14
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Anybody know where I can buy a nice shinny new stem bolt?
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Old 12-18-07, 10:47 PM   #15
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You didn't have to pay somebody to do it for you.
By Golly your right!
wanna lower it moar tho
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Old 12-19-07, 02:26 AM   #16
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Quote:
Originally Posted by darksmaster923 View Post
wanna lower it moar tho
Sounds like it's as low as it'll go, probably need to pay someone for a new stem. Do you have one that angles up (you mentioned flipping it down in the OP)?
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Old 12-19-07, 06:04 AM   #17
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Quote:
Originally Posted by darksmaster923 View Post
By Golly your right!
wanna lower it moar tho
If you got it low enough that scraping started, you really need to raise it above that point say 1/8 inch, to avoid stressing the fork steer tube that is inside. That repair will get expensive.

If you need to go lower, you either need a stem with a lower angle or shorter rise. Most road bike quill stems are a "7" shape with an angle of around 70 degrees, smaller than 90 degrees, so if this is what you have, you will need to get a shorter rise. If you have a 90 degree stem, look for a 70 degree stem. Ebay has a lot of good quality TTT road stems advertised. Can't say its the best price, but they are there, which is not that common in a quill stem these days!

You'll need to know what extension to buy. To a first approximation keep it the same as what you have. The stem extension is the reach forward contributed by the stem, so a longer extension stretches you out more. A small increase feels a lot different, to my old bones at least. An easy way to measure extension (to within a half-centimeter!) is along the top of the stem from the center of the bolt or the hole the rubber plug came out of, to the center of the handlebar. A real fitting freak will say you need to modify the extension when you make a significant change in bar height, but this will be close.

Don't lose the little rubber plug, and grease the stem before you install it - you NEED to prevent rust inside the fork steerer tube, if you'll see any rain, you're going to keep the bike for years, and if you're going to be able to disassemble it later on.

It might be complicated to get the old stem off of your 'bars, which probably need to be stripped down. It might be best to have your bike shop handle this.

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Old 12-19-07, 09:38 AM   #18
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yea i did that. read i cant lower it too low etc.
and yeah it angles up.
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Old 12-19-07, 09:48 AM   #19
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What kind of brakes do you have? You might want to check them before you go tearing off to try your new adjustment.
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Old 12-19-07, 10:01 AM   #20
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Let me throw a wrench into this...you can always convert to a threadless stem using an adapter and a threadless stem. There are all kinds of stems out there that have any kind of angle and length you might need. And it's much easier to take the bars off and on to change them as they all have removable plates on the front. Check out this link for a picture of what I mean..

http://www.performancebike.com/shop/...-_-null-_-null
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Old 12-19-07, 10:26 AM   #21
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If yours is angled up and you want your bars lower, you can buy a stem with a different angle. Just how low do you want your bars, though?
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Old 12-19-07, 08:41 PM   #22
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real low. my current feels kinda high. i have
http://cgi.ebay.com/SRAM-5-0-Right-G...QQcmdZViewItem
brakes
dont have a front deraileur cuz its only a 1x9 speed
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Old 12-20-07, 12:25 AM   #23
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Quote:
Originally Posted by astropuppy View Post
Anybody know where I can buy a nice shinny new stem bolt?
Is it for a quill, or an "aheadset" cap? Or the actual bolts for the stem?
  • For quills, they should be standard metric 8mm allen bolts (screws, fasteners) with socket cap, quite long though. They should be available in better hardware stores, but not too common.
  • For "aheadset" caps, they are metric 5mm allen bolts, and since these don't need to be very long (3 to 4 cm usually), you will find them in most any hardware shop.
  • Finally, if you really meant the bolts on the stem itself, they are (again) metric 4mm allen bolts, maybe about 2 cm long - check the length though. These are also very common and available in most HW stores.


Note that some quills use a different diameter! Some Nitto and some Ritchey stems use I think, 6mm and/or 7mm.

EDIT: for the 8mm quill bolt, I could only find some online shops where they sell them made of Titanium. It would be probably cheaper to buy a second hand steel quill on e-bay and use the bolt from there. You can find buy-it-now for $7.90.

Last edited by wroomwroomoops; 12-20-07 at 01:17 AM.
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Old 12-20-07, 06:11 PM   #24
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wroomwroomoops, thank you very much. it's a quill on an old univega.
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Old 12-20-07, 06:24 PM   #25
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FTIW, Many bike shops keep a supply of old used quill stems in various sizes. I've made several trades with my LBS.

Al
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