|DOH!!!! Doh!--Doh-doh-do-do..(endless echo).....venting||Qubeley|
Nov 7, 2003 10:27 PM
|MAN! This is one of the dumbest mistake ever.
So there I was, switch the stems from two of my bikes. Two ITM Millennium, one old, one new. 90mm and 100mm.
I was kind of in a rush, and did not pay much attention to the face place, assuming they are all the same. And of course, I did the switch. While I was tightening the face plate down, I noticed one of the screw is unusually hard to tighten. I should have taken notice then, but I didn't. Just muscled it back on.
When working on the second one, same thing, one screw is really hard to turn. Even better, no matter how hard I try, I couldn't bolt the little SOB down. This is when I felt something was wrong. So I removed both, and comparing the two, to my surprise(and horror later), the two ITM Millennium stem from two model years have a different face plate, and the distance between the two holes are actually different!
I tried to put them back to their right match, hear this: on one of stem I strip the thread, the other stem the thread was altered when I forced the wrong thing in. I couldn't even salvage either one stem!
After an hour of allen key turning, all I was left with was two trashed ITM stems, and two bikes with no stem. That really made my day!!!
Don't think I will be out riding anytime soon..
|What about tapping the stripped wholes...||Mr Nick|
Nov 7, 2003 10:50 PM
|And getting new hardware if you need it. It seems like chasing the threads might work, or changing thread pitch and getting some new screws from ACE. Might not be the prettiest but would save some serious cash.|
|Not as bad as it seems...||DERICK|
Nov 8, 2003 2:49 AM
|Bring them to a good bike shop. They should be able to repair the threads for a reasonable cost. It's not that big of a deal to fix. If the LBS can't do it an auto mechanic will surely have no problem with it.|
|Be Carefull||HENRY K|
Nov 8, 2003 6:02 AM
|I agree that the problem can be fixed but, I suggest that you have somebody that really knows what they are doing re-tap the threads. After all it is aluminum and this is one part of the bike where you do not want failure!! You might even want to try a machine shop.|
|Enter the drama police||IDH2|
Nov 8, 2003 6:41 AM
|This is definitely not a big deal...I worked a shop pt while in school and this stuff was absolutely routine. Of course some shops are better than others, but a good "high-end" shop in your area can fix this up for you quickly with no perceptible evidence of your blunder.
Just remember Qubeley, never start a bolt using a tool...always start it by hand and it will be very obvious if you have it cross threaded.
|let us know which shop you worked for...||stephenb|
Nov 8, 2003 9:13 AM
|so we can avoid it.
I can't imagine that a shop owner would be so cavalier with the safety of it's customers. The only thing worse than a stem failure is a fork failure. In either case the results are serious.
It is always best to error in the side of safety. A damaged stem is not the place to save money.
|probably the one ....||IDH2|
Nov 8, 2003 4:26 PM
|that takes your money steve....I don't why you're so cavalier about making inflammatory comments, but the only thing worse than an internet a$$ is an internet a$$ that thinks he knows everything...in either case, the results are serious. If your opinion is that he should not risk the repair, fine, but keep your crappy comments to yourself little boy.|
|sorry...don't bite my head off!!!||stephenb|
Nov 8, 2003 5:34 PM
|I didn't mean to sound (as you put it) inflammatory. I had it in my mind that I wouldn't want a shop employee doing what I think is an unsafe repair.
Sorry that I offended you.
Nov 8, 2003 7:32 PM
|I may have over reacted and I apologize for that.|
|Get a new one.||noupi|
Nov 8, 2003 8:12 AM
|Tapping is OK for a non vital !!! part , when you tap you remake a thread but it has nothing to do with a factory made thread.
A bigger bolt will fit fine in the retreadded part but cut that part in two you will see how fragile the new threads
This is a stem you are talking about......
25,35,45 mph down a hill and and hit a rough section of road
You will not get a warning, the bolt will rip right out.
|drill, tap, heli-coil||desmo|
Nov 8, 2003 9:29 AM
|but have a machine shop do it. it will be as good as new.|
|I wouldn't.||Spoke Wrench|
Nov 8, 2003 10:52 AM
|Either the stem had too much metal originally or there isn't enough metal to safely enlarge the hole. On a lightweight stem, my bets on the second possibility.|
|no way---drill, tap, heli-coil||straight-betwixt-2|
Nov 8, 2003 4:49 PM
|Do not put a helicoil in there. There is no where near enough metal to do it!
You can RISK putting in a different size bolt or switching from metric to standard if you can get between sizes. It's your risk though. I am sure that the stem was designed with the minimum amount of metal there to save weight and I would not thin those walls out if it were me.
Sorry to hear of your situation. One of those hard learned lessons.
|I'd be careful too....||zero85ZEN|
Nov 8, 2003 11:22 AM
|It looks like one of the stems uses smaller diameter screws. That one MAY have enough metal to work with. The other one I would write off. Like several posters have mentioned this is a component of the bike that you definitly do not want to have fail while riding.
I worked at a shop in the late '90's, and we would not have "fixed" this for you. To much liability in the event of a failure.
How much is peace of mind worth to you? You may have to chalk this one up as an expensive learning experience.
|Actually, it may just be the light but...||Spoke Wrench|
Nov 9, 2003 6:15 AM
|the two stems look significantly different to me. The one on the left looks "beefier." If that's true, I wonder if one is a newer design or if it's just an incremental size difference.|
Nov 9, 2003 8:26 AM
|The older one(90mm) is a little beefier than the newer version. My guess would be the model has been slimmed down for weight saving.|
|Do not throw them away!!!||crankset|
Nov 8, 2003 11:12 PM
|I will take them from you if you don't want them. I'll take the risk. My email is firstname.lastname@example.org Email me and let me know if you want to get rid of them.
Nov 9, 2003 10:10 PM
|Hopefully, Manuel will be using these stems himself and not fixing and selling to some unsuspecting buyer that would not know about past problems and potential dangers!!!|| |