Advertise on Bikeforums.net



User Tag List

Results 1 to 24 of 24
  1. #1
    Senior Member
    Join Date
    Jan 2008
    Posts
    86
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    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

  2. #2
    Senior Member orangepaint's Avatar
    Join Date
    Jul 2007
    Location
    Vangroovy, BC
    Posts
    379
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.

  3. #3
    Senior Member
    Join Date
    Sep 2006
    Location
    Van BC
    Posts
    3,745
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.

  4. #4
    Senior Member nateintokyo's Avatar
    Join Date
    Jul 2007
    Location
    Santa Barbara
    My Bikes
    SE Quadrangle, '82 Venus NJS, '03 Bianchi Pista, '86 P'sonic Mt Cat, Fat City Yo Eddy '91 + '93, B'cuda A2E, '86 Trek Elance 400, '88 Centurion D.Scott Expert, '88 Fisher Mt Tam (and no longer with me: SE OM Flyer, Umezawa/B-stone/Samson NJS)
    Posts
    1,508
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.

  5. #5
    /\/\ \/\/ Nouia's Avatar
    Join Date
    Oct 2006
    Location
    Nope
    My Bikes
    2007 Trek 6000, others
    Posts
    274
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.

  6. #6
    ThumperChump. ThunderChunky's Avatar
    Join Date
    Nov 2007
    Posts
    701
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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?
    Quote Originally Posted by crushkilldstroy View Post
    While we're on the subject, does anyone have any ideas for a pair of pants that are like JNCO's but a little bit more aero?

  7. #7
    abides and rides
    Join Date
    Feb 2007
    Posts
    471
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by orangepaint View Post
    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.

  8. #8
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,295
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by shanky View Post
    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.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  9. #9
    Senior Member
    Join Date
    Mar 2007
    Posts
    706
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The amount of thought people put into their safety boggles my mind.

  10. #10
    Senior Member
    Join Date
    Jan 2008
    Posts
    86
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.

  11. #11
    surly old man jgedwa's Avatar
    Join Date
    Sep 2006
    Location
    Carlisle, PA
    My Bikes
    IRO Mark V, Karate Monkey half fat, Trek 620 IGH, Cannondale 26/24 MTB, Amp Research B3, and more.
    Posts
    3,297
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    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.

    jim
    Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
    --------------------------
    SB forever

  12. #12
    Senior Member
    Join Date
    Jan 2008
    Posts
    86
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    so i will now make a journey to my LBS and see if i can find a longer step.

  13. #13
    rawthentic menergy
    Join Date
    Apr 2005
    My Bikes
    2005 johnny coast cycles #4 track, 1971 peugeot px-10 road, gt performer 1986 PINK bmx, 1966 raleigh rodeo 3-speed STICK SHIFT 20", 1960s rollfast tandem, 1970s raleigh fixed
    Posts
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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'

  14. #14
    Senior Member
    Join Date
    Jan 2008
    Posts
    86
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by operator View Post

    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

  15. #15
    Banned zelah's Avatar
    Join Date
    Mar 2005
    Location
    Portland
    My Bikes
    Mercier Kilo TT
    Posts
    2,536
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thompson

  16. #16
    Perineal Pressurized dobber's Avatar
    Join Date
    Oct 2003
    Location
    In Ebritated
    Posts
    6,557
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Nouia View Post
    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?
    This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.

  17. #17
    rawthentic menergy
    Join Date
    Apr 2005
    My Bikes
    2005 johnny coast cycles #4 track, 1971 peugeot px-10 road, gt performer 1986 PINK bmx, 1966 raleigh rodeo 3-speed STICK SHIFT 20", 1960s rollfast tandem, 1970s raleigh fixed
    Posts
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.

  18. #18
    untitled
    Join Date
    Oct 2007
    Posts
    153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    you can find kalloy seatposts that are more than long enough for 18-20 dollars

  19. #19
    Perineal Pressurized dobber's Avatar
    Join Date
    Oct 2003
    Location
    In Ebritated
    Posts
    6,557
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by shanky View Post
    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
    This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.

  20. #20
    Post-modern sleaze JohnnyDoyle's Avatar
    Join Date
    Apr 2007
    Location
    Boulder, CO
    My Bikes
    Fuji fixed, Browning fixed, MTB
    Posts
    259
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.
    Fuji conversion on Velospace.

  21. #21
    Boooga BOO
    Join Date
    Jan 2005
    Location
    Down Under
    My Bikes
    Colnago for road, Fuji for track
    Posts
    243
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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?

  22. #22
    ThumperChump. ThunderChunky's Avatar
    Join Date
    Nov 2007
    Posts
    701
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by J A Holman View Post
    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.
    Quote Originally Posted by crushkilldstroy View Post
    While we're on the subject, does anyone have any ideas for a pair of pants that are like JNCO's but a little bit more aero?

  23. #23
    Mo' Senior SSSasky's Avatar
    Join Date
    Oct 2004
    Location
    Ottawa, ON
    My Bikes
    1984 Norco Monterey SL (Ishwata 3X butted), matte black, 42-15 fixed
    Posts
    371
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Long quill stems are so cheap, even new. There is no reason to risk that kind of foolishness. Same goes for the seatpost.

  24. #24
    Senior Member
    Join Date
    Jul 2007
    Posts
    685
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by orangepaint View Post
    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.
    Quote Originally Posted by andre nickatina View Post
    the guy must have been like holy ****? this kid on a fixie is killin it without engine motors.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •