Advertise on Bikeforums.net



User Tag List

Results 1 to 13 of 13
  1. #1
    Senior Member Zoxe's Avatar
    Join Date
    Jul 2008
    Location
    Indianapolis!
    My Bikes
    Giant Cypress DX, Bianchi Imola, Surly Cross Check 105
    Posts
    432
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Phantom Clyde Noise

    Possibly in the wrong forum but as a Clyde, I figured it may help to address a Clyde audience.

    Just over a week ago, I bought an '09 Giant Cypress DX Hybrid. 21 speed, suspension at seatpost and front fork, and disc brakes.

    I'm 6'3" and 280lbs. We ride 4-6mi every night in subdivisions and bike paths near us, working up 1mi per week with a goal of 50mi/wk over the course of the next month or so.

    The Cypress has developed a phantom clicking/rubbing sound in the front and (I think) rear wheels. Initially it wasn't very loud but tonight was worse than normal. (I say 'I think' because soemtimes I think it's the front, sometimes I think it's the rear, and sometimes I think it's BOTH).

    It changes speed as I do, one click per wheel revolution. The click doesn't get any quieter when I decelerate hard (don't think it's the brakes rubbing). Seems to stay constant as I turn in either direction. Tonight it started quiet but by mid ride it was pretty loud. Most noticable from 6-10mph, quieter as I go faster.

    I am due for a check at the LBS in another 2 weeks but can take it in Wed/Thurs if I'm still scratching my head. I've checked for obviously loose screws but hesitate to wrench too much on it. I'm a mechanical engineer by education but scratching the paint on 'the baby' when it's less than 2wks old makes me twitch.

    Ideas?

  2. #2
    Senior Member
    Join Date
    Jun 2008
    Location
    West Monroe, LA
    My Bikes
    Raleigh Mojave 8.0, Soul Cycles Dillinger 29er (project, to be a SS rigid), Kona Dew Plus
    Posts
    266
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    knowing most disc brakes ... less something is loose elsewhere .. they can be a common source for 'clicking, squeaking, dead cow sounding' noises ... but something else to check, because of your weight .. would be the pedals ... i busted the ones that came on my bike after only a few miles.

  3. #3
    Senior Member Zoxe's Avatar
    Join Date
    Jul 2008
    Location
    Indianapolis!
    My Bikes
    Giant Cypress DX, Bianchi Imola, Surly Cross Check 105
    Posts
    432
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by -Devil- View Post
    knowing most disc brakes ... less something is loose elsewhere .. they can be a common source for 'clicking, squeaking, dead cow sounding' noises ... but something else to check, because of your weight .. would be the pedals ... i busted the ones that came on my bike after only a few miles.

    Cool. I'll check the pedals and otherwise keep my eyes on 'em. I don't think it's in the drivetrain because it clicks even when I'm coasting.

    The other thing I'm going to do is remove the aftermarket cateye magnet from my front spokes. It's not hitting when I roll it slowly but it's easy enough to check.

  4. #4
    Member
    Join Date
    Jun 2008
    Posts
    18
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sounds like the magnet is hitting, on my TCR, it wasnt hitting, but it was close. If i pedaled, or was leaning up over the bars, it would hit. Just try to turn the sensor out away from the magnet a little.

  5. #5
    Senior Member Bill Kapaun's Avatar
    Join Date
    Feb 2007
    Location
    Mid Willamette Valley, Orygun
    My Bikes
    86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
    Posts
    7,364
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Check for a loose spoke(s)
    Just squeeze adjacent pairs together and see if something obvious appears.

  6. #6
    Uber Goober StephenH's Avatar
    Join Date
    Sep 2007
    Location
    Dallas area, Texas
    Posts
    10,712
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    I was thinking the magnet as well. Can you adjust the bearings on the bike (IE, could you have a little extra play in there that needs adjusting?)

    If it's the pedals, it'll tick with each pedal revolution, not each wheel revolution, and quit when you coast.
    "be careful this rando stuff is addictive and dan's the 'pusher'."

  7. #7
    Senior Member
    Join Date
    Jun 2008
    Location
    West Monroe, LA
    My Bikes
    Raleigh Mojave 8.0, Soul Cycles Dillinger 29er (project, to be a SS rigid), Kona Dew Plus
    Posts
    266
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    yeah its not the pedals if it does it when coasting .. that just really leaves bearings, spokes, brakes, magnet .. or something like a rock stuck in a tire.

  8. #8
    Senior Member Zoxe's Avatar
    Join Date
    Jul 2008
    Location
    Indianapolis!
    My Bikes
    Giant Cypress DX, Bianchi Imola, Surly Cross Check 105
    Posts
    432
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Drat. It's not the magnet. I removed it from the spoke, coasted down the driveway, and phantom noise is as loud as ever. Noticed it's only noisy when I have weight on wheels. I walked it back up the driveway and was nice and quiet.

    Not sure on bearing adjustment StephenH. I was kind of thinking bearing noise, but it was still making noise while I turned a few figure 8's in the cul de sac.

    I think it may be the spokes as Bill suggested. A few are sprongier than the rest (that's a technical term), and some make a creaking sound when I squeeze them out of rest.

    Even if it's not the source of the noise, it looks like I need to adjust some spoke tension. No spoke key here, will prolly just take to the LBS Wednesday and not risk borking a new rim.

  9. #9
    Senior Member Zoxe's Avatar
    Join Date
    Jul 2008
    Location
    Indianapolis!
    My Bikes
    Giant Cypress DX, Bianchi Imola, Surly Cross Check 105
    Posts
    432
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Aha! I think this could be it.

    Spoke rub

    If there is a rubbing/clicking sound when you are riding, but you can't get it to happen when you lift the bike and spin the wheels off the ground, your problem is most likely related to loose spokes. In some cases, the spokes of an under-tensioned wheel will audibly rub against one another where they cross. This will only happen when the bike is carrying the weight of a rider. Try squeezing pairs of spokes together to see if they make the same sound you hear when riding.
    From: http://sheldonbrown.com/creaks.html

  10. #10
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
    Join Date
    Mar 2006
    Location
    South Florida
    My Bikes
    Techna Wheelchair and a Sun EZ 3 Recumbent Trike
    Posts
    16,158
    Mentioned
    12 Post(s)
    Tagged
    4 Thread(s)
    Gotta love mysterious noises. They can be a real PITA to track down.
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  11. #11
    Senior Member Zoxe's Avatar
    Join Date
    Jul 2008
    Location
    Indianapolis!
    My Bikes
    Giant Cypress DX, Bianchi Imola, Surly Cross Check 105
    Posts
    432
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Crisis averted. Thanks everyone for the ideas.

    Bought a spoke key today on the way home and went around both wheels looking for obvious problems. Found that I had a couple of spokes that were not quite flopping in the breeze. I don't have a calibrated eyeball yet, so only addressed obvious issues -- the rest will get hit when I take 'er back to LBS in a week for her 1mo check up.


    Tonight's ride was SILENT ... except for the wind and birds (and of course all my huffing and puffing ).

  12. #12
    Senior Member
    Join Date
    Jun 2008
    Location
    West Monroe, LA
    My Bikes
    Raleigh Mojave 8.0, Soul Cycles Dillinger 29er (project, to be a SS rigid), Kona Dew Plus
    Posts
    266
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    grats on finding it ... yeah i would get the lbs to true the wheels when you take it in ... but you can use the frame / fork to eyeball how smooth they are ... if when you spin them, there is no major wobble then all is good for now .. (works with brake pads as well if you have rim brakes)

  13. #13
    Guest
    Join Date
    Jul 2008
    Location
    Grid Reference, SK
    My Bikes
    I never learned to ride a bike. It is my deepest shame.
    Posts
    3,769
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You could call the shop and see if they can check the tension on the wheels and describe the problem you were having. I don't know what kind of warranty service they offer beyond a 1 month tune, but the shops I have worked in we would have rather done 15 minutes of retensioning than have a customer frustrated with a poorly functioning bike. Most production bikes come with machine-built wheels that have very uneven (compared to properly hand-built) tension, leading to poor performance and a weaker wheel.

    I started building my own wheels because I was convinced there was no reason they should ever detension, and the cause must be poorly or inadequetly tensioned spokes. As a bigger guy you should have your wheels built with slightly higher tension than most wheels. Hand tensioned wheels (even if you have to pay a bit to have the whole wheel retensioned) last longer and ride smoother - and quieter.

Posting Permissions

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