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Strange noise-Help with any thoughts(15 posts)

Strange noise-Help with any thoughts03Vortex
Oct 30, 2003 11:35 AM
I realize that a bike is a mechanical piece of equipment and annoying noises can result at any given time but here is my dilemma. I have a LS Vortex that developed a sudden creaking/grinding type of sound that essentially is there when I first jump on the bike and then goes away after several miles. It only seems to rear its ugly head when I apply pressure to the pedals. At first I thought it was the the BB which I recently replaced for another reason. But, the noise is still there. Oddly enough, the noise (before it goes away) will stop for a very short period of time when I change gears.

I just can't seem to isolate now and it is annoying. I have Rolf Pro wheels and wonder if it has anything to do with the rear hub.

Thoughts and remedies are welcome.
What pedals and seatpost/saddle do you use? nmorange_julius
Oct 30, 2003 11:46 AM
What pedals and seatpost/saddle do you use?
What pedals and seatpost/saddle do you use? nm03Vortex
Oct 30, 2003 11:54 AM
Dura Ace pedals and Easton EC 70 post. I often wondered if it is the seatpost and if so, what I could do about it. The post was changed to this one recently from another because I needed more setback. Whatever this nosie is, it obviously ceases after something settles in as a result of several miles of riding.
Yeah - sounds like the seatpost . ..Rich_Racer
Oct 30, 2003 12:05 PM
. . .does it go away when you stand?
Yeah - sounds like the seatpost . ..03Vortex
Oct 30, 2003 12:13 PM
I'm not sure of the answer to that. Will have to check. If this is it, what can I do? Obviosuly can't grease a carbon post. Also, why then would a change of gears eliminate the noise very briefly and then it returns? Perhaps changing gears has something to do with the pressure exerted on the seat going from one gear to another.
Has the post been slipping down into the ST at all?jtferraro
Oct 30, 2003 12:40 PM
If so, that slipping can be accompanied by the sound you're hearing. You are right - you can't grease a carbon post but you can remove the post and make sure you really clean both the post and the ST. I'm actually considering buying that same post for my mtb and I read all the reviews on mtbr.com. A few posters highly recommended really cleaning that ST w/a terry cloth covered dowel (or the like). If the post is slipping, you can also use a tad bit of chalk on it to put an end to it.

There's a chance that a change of gears might eliminate the noise very briefly b/c you are lightening up on the pedals for a cripser shift/less drivetrain wear, but are kinda doing it subconsciously?

Curious to know how you make out,

-Jeff
FWIWSteve_0
Oct 30, 2003 12:21 PM
my last suspected 'bottom bracket problem' was actually my heaset bearings. Was especially bad when I first started my ride; then seemed to settle in. Sprinting would cause reoccurrence. Steering felt nice and smooth, but I took it apart anyway for kicks. 3 crushed bearings.

Amazes me how with so few parts so close to your body, its hard to isolate the sound.
FWIW03Vortex
Oct 30, 2003 12:40 PM
It is so difficult to isolate anything. Perhaps this is it but if it is the headset I am completely fooled as it certainly doesn't sound like its coming from the front of the bike. MY LS has an integrated headeset.
FWIWSteve_0
Oct 30, 2003 12:48 PM
" It is so difficult to isolate anything "

yeah; thats what I was trying to say...didnt mean to imply that you should be able to hear where its coming from; just the opposite.
pedals?cyclopathic
Oct 30, 2003 12:28 PM
grease dried out/gummed up from cold. then it warms up from friction and noise goes away. Same can be with any other bearings, esp cartridge. But if your wheels squeaking it won't stop when you stop pedaling.

when you shift gears less pressure applied, hence no squeak.

Since noise is grinding I'd bet on pedals, not BB/seatpost. Try to spray in a bit of WD-40. It will sip in through seals, mix with grease and will calm squeak after a while (or you can rebuild pedals if you wish) good luck
re: Strange noise-Help with any thoughtsinsmanblue
Oct 30, 2003 12:48 PM
Have you tried to oil the skewers? A creak can happen as the bike flexes against the skewers particularly when you are out of the saddle.
re: Strange noise-Help with any thoughts03Vortex
Oct 30, 2003 12:52 PM
No. Thanks and I'll give that a try along with the pedals. It just appears to be something coming from the "rear" of the bike but I realize it can be very deceptive
re: Strange noise-Help with any thoughts12x23
Oct 30, 2003 4:14 PM
I have an 03 Vortex and have a similar (same?) problem. My V developed an awful creak when climbing or under any hard effort out of the saddle. I eliminated all the obvious sources before discovering the top bottle cage rivnut (sp?) on the downtube had worked a bit loose. The "flat" where the downtube cage fastens is so narrow I suppose the rivnut was "working" against the tube from the inside? I can loosen the top hex screw a bit and the creaking stops when I'm standing or climbing, yet will creak (quieter, but more frequent) while seated at moderate effort. If I hold the bottle cage it stops, and if I twist it a bit while riding I hear the same creak. That's how I isolated it. I called my lbs about it and they pretty much said no problem to drill out and replace the rivnut.
My own squeek - and how I fixed it...BowWow
Oct 30, 2003 8:28 PM
I had a somewhat similar noise, but mine wouldn't go away. It sounded like a flock of geese honking in rhythm to my pedaling. Drove me absolutely crazy. Quick background on the bike - a steel Cervelo Prodigy, bought used. The chain was pretty gunky, but otherwise the drivetrain looked OK.

So. Pulled the BB and wrapped it in teflon tape. Back together, same noise. AARRRRGGGGHHH! I thought maybe I hadn't put enough tape on the threads, so apart it came again, more (much) tape, this time on the threads AND the rubberized end of the BB. Back together, same noise, only worse. Woof! Bow wow!!! RRRRRRRRRR!!!

The noise was definitely drivetrain. When I stopped pedalling the noise stopped. What next? I turned my attention to the chain. I hosed it with a TON of WD40 to wash the gunk out. Wiped it down, let it dry, then applied the ProLink. Wiped it dry again (the rag turned very, very black), then let it dry while I disassembled the freewheel. I have edco hubs, which have sealed bearings. When you loosen the nut/cone on the left the axle pulls free, and the freewheel pawls are exposed. I wiped everthing down, applied dabs of grease under each pawl, and reassembled the hub. Then I wiped each cog in the cassette down and torqued it all down properly. Oh, it may be important to note that the lockring on the cassette was barely finger tight when I took it apart. It is torqued now.

Finally, after reinstalling the rear wheel I again slopped the ProLink on. This time the rag was much cleaner when I wiped it down. Back on the road - and perfect silence! Even the relatively noisy freewheel was quieter when I coasted. Ahhhh!

For what it's worth, check your chain, check your cassette, and check your freewheel.

Good Luck!

Steve
likely your freehubcollectorvelo
Oct 31, 2003 12:07 PM
most likely is your freehub
just change wheels with a friend and try your bike

I bet noise is gone