Advertise on Bikeforums.net



User Tag List

Results 1 to 13 of 13
  1. #1
    Senior Member
    Join Date
    Feb 2006
    Posts
    226
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    bike rides "wobbly" or "not straight"...

    i just built up a single speed/mountain *** street bike for my girlfriend. i used an old "diamondback outlook" frame that i found in a friends garage. it was a cheesy old beater but it had nice long horizontal dropouts and was just my girlfriends size so i took the plunge.

    anyway, things were going really good. i got the frame powdercoated cheap, and reassembled it with good quality parts i had lying around. when we were just about done i decided we should take it out for a test ride. she rode it down the street and i noticed she was kinda swerving a little bit, from side to side, and making lots of corrections with the handlebars. she came back and told me that it felt "weird". i tried it too and she was right. for some totally unapparent reason the bike is just sorta all over the road. with each pedal stroke it swerves slightly to the left, and then to the right. if you even tried to take you hands off of the handlebars you'd eat **** instantly. it's that unstable. keep in mind this bike rode FINE before we took it apart. i know i put it back together right.

    this problem is driving me crazy. maybe the frame was damaged at the powdercoater? is something out of alignment? i just put on a brand new pair of geax streetrunners 26x1.25 tires. any ideas???

    thanks!

  2. #2
    Senior Member
    Join Date
    Feb 2006
    Posts
    226
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    ps - the rear wheel is a little untrue.

  3. #3
    Non Tribuo Anus Rodentum and off to the next adventure (RIP) Stacey's Avatar
    Join Date
    Dec 2002
    Posts
    9,163
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is the headset too tight?

  4. #4
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
    Posts
    23,755
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Stacey
    Is the headset too tight?
    +1. That's what I was going to ask too.

  5. #5
    Non Tribuo Anus Rodentum and off to the next adventure (RIP) Stacey's Avatar
    Join Date
    Dec 2002
    Posts
    9,163
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Or maybe the bearings notchy?

    Look to the headset Grasshopper.

  6. #6
    Senior Member rjacob's Avatar
    Join Date
    Apr 2007
    My Bikes
    90' Trek 1000, 06' Diamondback Sorento, Trek 700 cyclocross conversion
    Posts
    153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Or maybe the cones are backed off a little and giving the wheel too much play. Try to wiggle the wheel side to side. Does it feel loose? If so, it's in the hub.

    If not, turn the wheel. Do you see the wheel go side-to-side towards one brake pad then the other? If so then the wheel is out of true. If it goes side to side ALOT, then the rim might be bent, and need to be replaced.

  7. #7
    Senior Member
    Join Date
    Feb 2006
    Posts
    226
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah, the headset is tight. I thought maybe the fork play was the problem so I kinda overtightened it. I am having trouble with the headset. It doesn't seem to want to go back together just right. I guess I could try to install a brand new one. Never done that before, just overhauls.

    The rear rim is a little untrue but I don't know if it's bent. I really don't think so.

  8. #8
    Senior Member nick burns's Avatar
    Join Date
    Oct 2004
    Location
    Absecon, NJ
    My Bikes
    Puch Luzern, Puch Mistral SLE, Bianchi Pista, Motobecane Grand Touring, Austro-Daimler Ultima, Legnano, Raleigh MountainTour, Cannondale SM600
    Posts
    2,941
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Have a drink and try it out again. Bet it smooths right out.

  9. #9
    Senior Member ludeboy_77's Avatar
    Join Date
    Nov 2006
    Location
    San Gabriel Valley, California
    My Bikes
    Schwinn Letour 1989, Shogun 300 198?
    Posts
    128
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is the powder coat interfering with the cups for the headset? You may have to scrape away some of the power coat to get the cups back in place correctly.

  10. #10
    Unemplawyer
    Join Date
    Aug 2004
    Location
    The Natural State
    My Bikes
    2006 21" Rockhopper
    Posts
    459
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It's also possible that the frame isn't straight. If the rear wheel doesn't track the same line as the front it can cause all kinds of problems.

    But I'd agree, so far it sounds like it's a problem in the headset area. It'd take a REALLY out of round (like visually obvious) rear wheel to cause those problems, and being out of true would only become a real problem at speeds over 20mph or so, and even then only if it was pretty bad.
    Hope you like reality.
    -racingpain

  11. #11
    Senior Member nick burns's Avatar
    Join Date
    Oct 2004
    Location
    Absecon, NJ
    My Bikes
    Puch Luzern, Puch Mistral SLE, Bianchi Pista, Motobecane Grand Touring, Austro-Daimler Ultima, Legnano, Raleigh MountainTour, Cannondale SM600
    Posts
    2,941
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Check for broken axles.

  12. #12
    Non Tribuo Anus Rodentum and off to the next adventure (RIP) Stacey's Avatar
    Join Date
    Dec 2002
    Posts
    9,163
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rode good before, rides not so good now. My money is on an assembley issue.

  13. #13
    Senior Member
    Join Date
    Feb 2006
    Posts
    226
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    hey all. i took it to my local bikeshop and they all pretty much concurred that it was the headset. the powdercoater did powder the inside of the headset cups too. they're putting a new headset in for me now and it should be done when i get off in about 10 mins or so. thanks for your input!!!

Posting Permissions

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