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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 02-04-08, 02:41 AM   #1
shanky
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raising stem over recommended amoutn

Just a question about the risks of raising the stem above the recommended amount.

I don't know if the bullhorns made it feel longer then it actually is but since i have switched to a straight bar it feels smaller.

Just wondering whats the risk. I put a decent amount of pressure on it as i was riding it. and i will carry my tools with me so if i need to adjust it i can. But whats the risk?

Thanks a bunch in advance.

I'm not sure how it applies to bikes, but a lot of factory recommendations are just safety precautions. In tennis (kind of my reference point of a lot of things) each racquet has a recommended tension range and its okay to go outside it so long as you are not putting too much extra tension on the frame. Is it the same for bikes?

BTW i also have the seat higher then the recommended amount, and thats been fine so far.

Last edited by shanky; 02-04-08 at 02:46 AM. Reason: edit
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Old 02-04-08, 02:45 AM   #2
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What's the risk?

Worst case scenario, your stem snaps off and you're left holding a pair of handebars attached to nothing. An SUV driven by an elderly Asian man pulls out in front of you and without brakes or usable handlebars, go crashing through his rear windshield. The impact causes severe head trauma because you aren't wearing a helmet and the broken class cuts through your neck. The elderly Asian man is scarred for life and you have to live with the responsibility of having caused this.
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Old 02-04-08, 02:49 AM   #3
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One risk is that you will put whatever mechanism spreads out at the bottom of the stem close to the threads on your steerer tube. This could bulge the threads out, ruining your fork.

The bottom line is, that minimum insertion line is there for a reason. IMO it's not worth it to mess around outside that safety zone when the stem is such an important part of your bike---a tennis racket will not break a you face if it fails. Just get yourself a technomic or similar long-quilled stem. Apparently SR made some long ass stems to go with suntour stem shifters that you can get for a lot cheaper than a technomic at your local coop.

Need info on Nitto Technomic stem

Last edited by mander; 02-04-08 at 02:59 AM.
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Old 02-04-08, 02:50 AM   #4
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that sounds like the worst case scenario, or close to it. you could get a stem in your eye too!

but it depends on how much you are raising, and how much is left.

some quill stem's max extension is shorter than others. I personally wouldn't do it if you can avoid it, but depending how much is left it probably won't bring a major calamity. new stem is a better option tho.
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Old 02-04-08, 02:52 AM   #5
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Just keep it tightened down and check for wobblies/looseness often. I wouldn't really expect a catastrophic "snap" type failure if its a reasonably new and decent stem.
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Old 02-04-08, 02:56 AM   #6
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yeah, it's a great idea for commiting suicide because you never know when it'll go. wait...but why do you want to kill yourself?
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Old 02-04-08, 04:56 AM   #7
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Worst case scenario, your stem snaps off and you're left holding a pair of handebars attached to nothing. An SUV driven by an elderly Asian man pulls out in front of you and without brakes or usable handlebars, go crashing through his rear windshield.
That's why you should attach your brake lever to your top-tube.
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Old 02-04-08, 07:31 AM   #8
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Just a question about the risks of raising the stem above the recommended amount.

BTW i also have the seat higher then the recommended amount, and thats been fine so far.
1) Bad idea to raise stem past min insertion, it's there FOR A REASON. And also note that the handlebars is one of the most stressed parts on a fixed gear since you're always cranking on it at low speeds to get up to speed

2) Seatpost above recommended amount? May destroy the frame. Although not nearly as bad as destroying a stem and the resulting accident.

You ride, what is called a smart bike. Smart in that the owner didn't want to spend the $20 and get a stem with the correct height and another $10 on the correct seatpost, risking not only his frame but an accident if that were to ever **** up.

Penny-wise, pound-foolish.
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Old 02-04-08, 08:04 AM   #9
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The amount of thought people put into their safety boggles my mind.
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Old 02-04-08, 09:16 AM   #10
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Alright thank you for all the advice, and it is not my wish to put my life in unneeded danger. So haven't left for school yet and will lower the stem and will work on getting a longer one.

Thank you for the advice.
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Old 02-04-08, 09:25 AM   #11
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I am all for cutting corners, but raising the stem and post above the minimum insertion line is foolish. Both problems can be solved with used parts from the LBS for not much money.

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Old 02-04-08, 09:36 AM   #12
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so i will now make a journey to my LBS and see if i can find a longer step.
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Old 02-04-08, 09:50 AM   #13
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you can always find a taller stem. the nitto technomic stem is crazy tall, qbp carries it, and your lbs should be able to order it for you. http://www.lickbike.com/productpage.aspx?PART_NUM_SUB='1172-10'
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Old 02-04-08, 09:51 AM   #14
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2) Seatpost above recommended amount? May destroy the frame. Although not nearly as bad as destroying a stem and the resulting accident.


Penny-wise, pound-foolish.
recommend longer seat post please
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Old 02-04-08, 09:54 AM   #15
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Old 02-04-08, 09:54 AM   #16
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Just keep it tightened down and check for wobblies/looseness often. I wouldn't really expect a catastrophic "snap" type failure if its a reasonably new and decent stem.
This is perfect advice.....to ignore.

Why do you think there is a minimum insertion line?
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Old 02-04-08, 09:58 AM   #17
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you need a longer seat post too? LBS! again, qbp has hundreds of seatposts. a kalloy (cheap brand) comes in all variety of lengths & sizes, shouldnt cost you more than $25-30

a better question is if the frame is your size in the first place - if you need a long seatpost & stem, you might want a larger frame.
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Old 02-04-08, 10:13 AM   #18
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you can find kalloy seatposts that are more than long enough for 18-20 dollars
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Old 02-04-08, 10:31 AM   #19
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recommend longer seat post please
There are plenty of seatpost available, the length you need is dependent upon what you currently have and how much more lenght you need.

Get started here http://aebike.com/page.cfm?PageID=30...ory=185&type=T
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Old 02-04-08, 10:52 AM   #20
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As for the stem--I concur, it's not worth risking injuring yourself/messing up the rest of the components on your bike for the few extra mm you'll gain. You could get a new stem, or even post up in the Wanna Trade thread, see if anyone has a longer stem they'd like to get rid of.

As for a seat post...most LBS have plenty of no-names in stock, just go in and see if they have something longer to fit your frame. Probably cost you $10.

You have a third, probably better option than any of those--get a bigger frame. If the frame is sized properly, you shouldn't have to come anywhere near the max lines on either seatpost or stem.
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Old 02-04-08, 11:01 AM   #21
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just to be clear, you are talking about raising a quill stem above the recommended point? I can't imaging how anyo other arrangemnt you can raise a stem period right?
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Old 02-04-08, 11:10 AM   #22
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just to be clear, you are talking about raising a quill stem above the recommended point? I can't imaging how anyo other arrangemnt you can raise a stem period right?
usually when you begin a line with "just to be clear", it makes sense. yours is a special case.
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Old 02-04-08, 11:42 AM   #23
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Long quill stems are so cheap, even new. There is no reason to risk that kind of foolishness. Same goes for the seatpost.
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Old 02-04-08, 11:57 AM   #24
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What's the risk?

Worst case scenario, your stem snaps off and you're left holding a pair of handebars attached to nothing. An SUV driven by an elderly Asian man pulls out in front of you and without brakes or usable handlebars, go crashing through his rear windshield. The impact causes severe head trauma because you aren't wearing a helmet and the broken class cuts through your neck. The elderly Asian man is scarred for life and you have to live with the responsibility of having caused this.
very kafkaesque.
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