Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-20-05, 02:43 PM   #1
jamey
Senior Member
Thread Starter
 
jamey's Avatar
 
Join Date: Oct 2004
Location: st. pete/tampa, FL
Bikes:
Posts: 1,588
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
anyone ever have this problem?

i'm hoping i'm not thinking clearly and this is an easy problem to fix. i started hearing this weird noise when i would need to backpedal hard to come to a stop..you know, the stops that don't need a skid but you need to slow down. well i decided it meant i should probably take my bottom bracket apart and give it some tlc. i greased everything up and put her back together..problem solved? i thought so! the next day i try to stop the same way and it makes the noise again so later that day i take off my crank and my non driveside bottom bracket thingy is loose. i tightened it and then today it seems like the problem is still there.. any ideas?!
jamey is offline   Reply With Quote
Old 05-20-05, 02:48 PM   #2
bostontrevor
Retrogrouch in Training
 
bostontrevor's Avatar
 
Join Date: Sep 2004
Location: Knee-deep in the day-to-day
Bikes:
Posts: 5,484
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Can you describe said noise?
bostontrevor is offline   Reply With Quote
Old 05-20-05, 02:53 PM   #3
ryan_c
troglodyte
 
ryan_c's Avatar
 
Join Date: Jul 2004
Location: the tunnels
Bikes: Soma DoubleCross, Surly Steamroller, various others
Posts: 1,284
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes, is it a squeak? A rattle? Does it tell you to kill?
ryan_c is offline   Reply With Quote
Old 05-20-05, 02:53 PM   #4
jamey
Senior Member
Thread Starter
 
jamey's Avatar
 
Join Date: Oct 2004
Location: st. pete/tampa, FL
Bikes:
Posts: 1,588
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
it almost sounds like a pop..i'm ready for it to be something really horrible..like the bottom bracket threads being shot or something like that.
jamey is offline   Reply With Quote
Old 05-20-05, 02:53 PM   #5
Cynikal
Team Beer
 
Cynikal's Avatar
 
Join Date: Apr 2004
Location: Sacramento CA
Bikes: Too Many
Posts: 5,920
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Did you grease the threads? Is the BB new?
Cynikal is offline   Reply With Quote
Old 05-20-05, 03:00 PM   #6
jamey
Senior Member
Thread Starter
 
jamey's Avatar
 
Join Date: Oct 2004
Location: st. pete/tampa, FL
Bikes:
Posts: 1,588
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Cynikal
Did you grease the threads? Is the BB new?
lets just say there might be more grease in the bottom bracket area than bottom bracket..ok, not really but yeah i greased the crap out of it. it is a new bottom bracket..new bike actually. a few days prior to all of this was the first time i had even touched the bottom bracket just because i was doing a all around bike tightening.
jamey is offline   Reply With Quote
Old 05-20-05, 03:08 PM   #7
richardmasoner
Fritz M
 
richardmasoner's Avatar
 
Join Date: Mar 2005
Location: California
Bikes: Trek, Spesh, GT, Centurion
Posts: 960
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by jamey
it almost sounds like a pop..
A bike repair stand and a stethoscope should allow you to pinpoint the source of the noise. If you don't have a stethoscope, use a piece of rubber tubing.

RFM
richardmasoner is offline   Reply With Quote
Old 05-20-05, 03:10 PM   #8
fixedpip
asleep at the wheel
 
fixedpip's Avatar
 
Join Date: Aug 2004
Location: Chicago
Bikes: Custom Richie Ditta Track Bike, Eddie Merckx Corsa, Marioni Custom Pista, Dolan Cyclocross
Posts: 974
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Try using teflon/plumbers tape on the bb threads , it will stop things working loose and make your BB a little snugger.

The pop/click sounds like a BB adjustment issue, which you seem to have discovered is caused by your BB being loose. If you're still getting it when everything is snug then its a bearing issue which means replacing the bearings or BB.

I would also check your adaptor sleave/cup is not cracked. Some of the cheaper Sealed BBs have plastic ones and it can be damaged if not installed correctly.

Good luck
fixedpip is offline   Reply With Quote
Old 05-20-05, 03:16 PM   #9
jinx_removing
SuperstitiousHyperrealist
 
jinx_removing's Avatar
 
Join Date: May 2004
Location: Boston
Bikes: unknown road conversion, half built Benotto track
Posts: 433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Since it is a brand new bike are the wheels new? If the spokes are not properly tensioned you will hear a ping/pop as they settle in, kind of like guitar strings when you put new ones on the ol' axe.

My favorite "pop" theory though is the ungreased pedal thread. This will make the most awful/scary sound sometimes if the threads are not greased. Also check your chainring bolts to make sure they are on tight.
jinx_removing is offline   Reply With Quote
Old 05-20-05, 03:17 PM   #10
bostontrevor
Retrogrouch in Training
 
bostontrevor's Avatar
 
Join Date: Sep 2004
Location: Knee-deep in the day-to-day
Bikes:
Posts: 5,484
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
A pop sounds like a loose crank arm or cog perhaps. Do you feel any sudden shift when it makes the noise?
bostontrevor is offline   Reply With Quote
Old 05-20-05, 04:01 PM   #11
jamey
Senior Member
Thread Starter
 
jamey's Avatar
 
Join Date: Oct 2004
Location: st. pete/tampa, FL
Bikes:
Posts: 1,588
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
it's definitely a pop in the bottom bracket area. i only hear it when i slow down hard and when i would trackstad (when being the correct word since i have stopped since this noise started). it's sounds/feels like it's on the left side so i think i'm going to try fixedpp's idea to see if that makes it more snug and stops the noise.
jamey is offline   Reply With Quote
Old 05-20-05, 04:03 PM   #12
jamey
Senior Member
Thread Starter
 
jamey's Avatar
 
Join Date: Oct 2004
Location: st. pete/tampa, FL
Bikes:
Posts: 1,588
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by bostontrevor
A pop sounds like a loose crank arm or cog perhaps. Do you feel any sudden shift when it makes the noise?
it feels like there might be a little bit of a shift but i don't know if it's the bottom bracket or me trying to pedal in the other direction to avoid the noise happening again. one of those things where you don't know if it's really there or if your mind is just scaring you..
jamey is offline   Reply With Quote
Old 05-20-05, 04:23 PM   #13
baxtefer
Cornucopia of Awesomeness
 
baxtefer's Avatar
 
Join Date: Oct 2004
Location: not where i used to be
Bikes:
Posts: 4,847
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I get the same feeling sometimes too. I feel this *pop* sensation in my feet sometimes when I'm starting from a standstill, or after really mashing up a hill. It almost feels like the chain is trying to jump off the ring.
I've been trying to track it down for the past week. So far:
0. cleaned and lubed chain
1. Replaced BB (old one was dead)
2. tightened chainring bolts
3. tightened cranks
4. checked pedal tightness.
5. checked chainline (about 1mm off)

This has reduced the popping by about 75%, but it's still there. I guess i'll tear it down again this weeked. and check the BB tightness.
Maybe I need a new chain?
baxtefer is offline   Reply With Quote
Old 05-20-05, 05:19 PM   #14
ostro
hang up your boots
 
ostro's Avatar
 
Join Date: Aug 2004
Location: San Francisco
Bikes: 84 Pinarello, Trek Liquid 30, Torker CX 24, Gromada Track
Posts: 1,574
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what about the ole seatpost and saddle, are you sure its a BB noise. I have had the mysterious noise too and people have suggested checking out the seatpost and sure enough. Returning the favor.
__________________
SF Radar 7 day Forecast
ostro is offline   Reply With Quote
Old 05-20-05, 05:33 PM   #15
el twe
crotchety young dude
 
el twe's Avatar
 
Join Date: Jan 2005
Location: SF, CA
Bikes: IRO Angus; Casati Gold Line; Redline 925; '72 Schwinn Olympic Paramount
Posts: 4,818
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are the pedals new? If not, it could be that the bearings are shot...
__________________
Quote:
Originally Posted by CardiacKid View Post
I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
IRO Angus Casati Gold Line
el twe is offline   Reply With Quote
Old 05-20-05, 05:34 PM   #16
baxtefer
Cornucopia of Awesomeness
 
baxtefer's Avatar
 
Join Date: Oct 2004
Location: not where i used to be
Bikes:
Posts: 4,847
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
me?
My saddle rails to creak every so often, but I'mpretty sure it isn't the source of this problem, but I'll check. I can actually *feel* the popping in my feet, so I doubt that it's the seatpost.
baxtefer is offline   Reply With Quote
Old 05-20-05, 05:37 PM   #17
baxtefer
Cornucopia of Awesomeness
 
baxtefer's Avatar
 
Join Date: Oct 2004
Location: not where i used to be
Bikes:
Posts: 4,847
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by el twe
Are the pedals new? If not, it could be that the bearings are shot...
pedals are 4 month old eggbeaters.


whoa! I just removed the dustcaps on the ends and found out that I have about 5mm of play in the pedal bodies! is this normal?
baxtefer is offline   Reply With Quote
Old 05-20-05, 05:41 PM   #18
*new*guy
ambassador of good will
 
*new*guy's Avatar
 
Join Date: Jun 2004
Location: NOVA
Bikes: many.
Posts: 2,019
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
take a look at your cog, too. A bent tooth will pop and ping as the chain jumps around under heavy load.
*new*guy is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 08:20 AM.