[demo 9]

ok so i bent the steerer tube on my 66VF, i got it replaced. i rode it for about 2 days before the stem started slipping on every single bump i hit. it wasnt bad so i put up with it for a day, i tightened it and its not better, it wasnt even loose... so i try another 2 stems, same thing, wtf?

am i stupid or is this not supposed to be possible?

 

[DirtyMike]

Strange, no problems with mine, did you tighten it up by hand, or use a torque wrench? also might want to try cleaning the steerer with some type of degreaser to make sure there is no grease on the steerer itself before putting them stem on.

 

[pinkshirtphotos]

is it twisting back and forth or is it going up and down, it could be your headset is shot or not pressed properly

 

[V-Dub GTI]

Your Photos don't work because of the profanity in them.

 

[demo 9]

Your Photos don't work because of the profanity in them.

ya i am workin on that now...oster_oops:

 

[demo 9]

i used this

and one of these

 

[pinkshirtphotos]

way to suck thats not a real pipe

 

[demo 9]

way to suck thats not a real pipe

? i just want the explanation....

 

[pain]

way to suck thats not a real pipe

wanna bet? ill hit you over the head with it then we will see if its a real pipe or not

 

[pinkshirtphotos]

its a hollow bar not a pipe

 

[pain]

its a hollow bar not a pipe

please provide a picture of a "pipe" considering a "pipe" is a hollow bar how else would water go through the "pipes" in your house you dumb ****

 

[pinkshirtphotos]

hollow bar

pipe

a hollow bar is a solid that has been bored out a pipe was formed in the tube form

 

[pain]

actually im pretty sure your top picture is metal "stock" anyways the persuader isnt anywhere near as thick as your metal bar

 

[pain]

and whats this? http://www.global-b2b-network.com/direct/dbimage/50219043/Aluminum_Pipe.jpg
aluminum bars?

 

[demo 9]

ur both retarded, call it what u want, it persuades, does anybody actually know the problem

 

[psychobiker]

seriously is the top cap on

 

[rosenamedpoop]

I've seen that happen quite a bit actually. Almost always with Thomson stems (sometimes others). To solve it you can rub the inside of the stem in vertical strokes with 80 grit sand paper, but don't get crazy, you just want to rough it up. In addition you can use a razor to score vertical lines on the inside of the stem.

 

[jonKranked]

JB Weld dat sh!t on yo!


and to those of you arguing about metal pipes and stock.... go read pride and prejudice

 

[psychobiker]

im using my headlock in my triple clamp..

 

[Mike Buell]

Try adding a spacer, you might be bottoming out the top cap on the steer tube, seen that happen bunches of times even if it looks like there is enough.

 

[be350ka]

Well, I think it is safe to say that it was a little joke since his stem was slipping on a 1 1/8 steerer. For ref. 1 1/9 is smaller than 1 1/8 Thus the joke.

 

[DirtyMike]

I think we need to go back to the responsive question, of is the stem moving side to side, or is the headset geting loose

 

[DirtyMike]

seriously is the top cap on

Top cap just sets your preload, once its properly setup, you can take it off. i have already proved this in the past down at Fontana and up at Bigbear running all day long with the top cap in the truck

 

[demo 9]

the stem is moving side to side, (think x up with the wheel not moving), the top cap is on and it is not hitting the steerer. what i just do not understand is the slipping, i mean that stem is really kcufing tight!

 

[frznnomad]

did you ever think that you might have stripped out the clamping bolts on your stem. i mean using a cheater bar to tighten those things down is deffinatly a recipe for disaster man. if that isnt what it is then try all the abbrassion techniques the other guys gave you.

 

[DirtyMike]

Without having it in front of me i do not have a good "Answer" for why your stem keeps coming loose, specially seeing how its been more than one stem. My only suggestion would be to rouch up the steerer and the inside of the stem, USE A TORQUE WRENCH and other than that, make sure you havent stripped the stem

 

[DownCycles_Stef]

Also check that the new steerer is not spinning in the crown. While it's unlikely since it was just replaced, it can happen. If it is, I would play it safe and just replace the entire steerer/crown/stanchion assembly rather than risking having another faulty steerer pressed in.

 

[demo 9]

ok, the stem is not stripped that is the first thing i checked, i will see if its spinning because i could see that happening, also tomorow ill get it rough

 

[buildyourown]

You never said what type of stem you had. Is it a pinch bolt type with a slot? My bet is that it is. The slot on the stem is too small and the 2 sides are touching, making the bolt feel tight without clamping the steerer.

 

[davep]

You never said what type of stem you had. Is it a pinch bolt type with a slot? My bet is that it is. The slot on the stem is too small and the 2 sides are touching, making the bolt feel tight without clamping the steerer.

or the stem is stretched/bent from over-tightening..causing the same issue.

 

[bikenweed]

Alloy or steel steerer tube? There is the possibility that you've crushed the steerer tube after tightening down the stem so much. Grab a micrometer and go to town checking diameters. Compare to another fork that you know isn't crushed.

 

[DirtEveryDay]

yeah, what the last two guys said. Another trick on Thompson stems is to smear a little loctite on the steerer tube, then slide it on.
And damn, dude. You don't need a cheater bar to tighten anything on a bicycle! You've def got a crushed steerer tube(or is a "bar" since it's bored out, Pinkshirt?) and/or a stretched stem. Shame on you for killing innocent bike parts!

 

[demo 9]

its a deity stem, forgot to mention that, the other stem i tryed was a truvativ. i did not use the cheater bar until after dealing with the problem for 2 days. *i was not the original person to put this stem on this bike* my bike shop did, i am not denying that i could have broken it-i just do not think i did

 

[CKxx]

I had a Deity stem slipping like hell. I had accidentally gotten some grease on the thing. Just go de-grease the stem and steertube (while its on the bike, so you don't grease it up again going thru the frame) and then rub the stem gently with some sandpaper and wipe it clean.

That fixed it for me.

EDIT: Also, you def don't need a beater bar to tighten the stem, so make sure you haven't stretched your stem shut. People do it to forks all the time.

 

[BrooklynMachine]

before anything else.

 

[Huck Banzai]

I had a Deity stem slipping like hell. I had accidentally gotten some grease on the thing. Just go de-grease the stem and steertube (while its on the bike, so you don't grease it up again going thru the frame) and then rub the stem gently with some sandpaper and wipe it clean.

That fixed it for me.

EDIT: Also, you def don't need a beater bar to tighten the stem, so make sure you haven't stretched your stem shut. People do it to forks all the time.

There isnt a part anywhere on any bike that would require a cheater bar, or even very significant manual effort for that matter.

This really sounds like a goofed up steerer tube - wither undersized to begin with (WTH?!) or crushed somehow. Stop messing with it and get it replaced again!

 

[DirtyMike]

before anything else.

Agreed, after that buy one of these.

http://www.parktool.com/products/detail.asp?cat=13&item=TW-2

 

[Huck Banzai]

Imagine Arnold S say 'Micrometer'

hysterical

MYKWOMMEDDUH!


How much is a decent one? BAH, enough with the tool lust until I have a garage (or a basement) - Ill just use the one in the shop.

 

[jonKranked]

Agreed, after that buy one of these.

http://www.parktool.com/products/detail.asp?cat=13&item=TW-2

and then, buy this:

 

[DirtyMike]

You can get a decent Digital Mic for about 20 bucks at Harborfreight