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So THAT'S what that creaking is...

Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

So THAT'S what that creaking is...

Old 11-28-09, 05:06 PM
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dstrong 
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So THAT'S what that creaking is...

Creaking was getting worse over my past few rides, to the point that I cut my last ride short. Symptoms were creaking coming from somewhere between my seat and the bottom bracket but couldn't quite nail it down exactly. Creaked when I pedaled, a little when not pedaling, none when I was out of the saddle. Suspected the seatpost/seattube interface (aluminum/carbon) and noticed the seatpost collar really creaked when I removed it when removing the seatpost. Thought maybe it was due to raising my seat and leaving less post in the frame (different stresses?).

Lubed everything, used carbon paste on the seattube, a little grease on the interface between the collar and the frame, checked the BB torque specs, adjusted the headset, tightened water bottle holder bolts, etc.

Started riding today and the creaking was still there. What HAVEN'T I checked?!!?!?!? Oh crud...I had moved my seat forward a few mm's a month ago...did I ever re-tighten completely after committing to the position? Hmmmmm. Stopped, got out my multi-tool and sure enough...the bolts holding my seat were barely tight. Cranked 'em down and no more creak. Sheesh...these bikes are finicky!
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Old 11-28-09, 05:38 PM
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I think your lucky that it didn't move as you mentioned that you adjusted it a month ago. How many rides did you get in since the adjustment?

By the way, my wife and I love Austin. Almost moved to Leander.
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Old 11-28-09, 06:08 PM
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Wow, I had similar symptoms on my old DH rig on the last couple outings before I sold it. I was never able to track down the problem, I bet that was it!
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Old 11-28-09, 06:57 PM
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My bike fits those symptoms also, I would check the chain ring, because that is what is making my bike creak. The chain ring might be a little bent.
Hope you find out what it is!
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Old 11-28-09, 06:58 PM
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According to Richard Feynman: " My grad students do not understand Quantum Bicycle Mechanics. I teach it and I don't understand Quantum Bicycle Mechanics. If you claim to understand Quantum Bicycle Mechanics, you don't. "
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Old 11-28-09, 11:06 PM
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Jacobsdad...i've ridden sparingly over the last month, so not many opportunities for it to slip on me. Regarding Leander...nice place to live and to ride, although many of the roads out there have no shoulder, so it's you and the hicks on a lot of two-lane roads. Not sure if you know this but Austinites call people from Leander "Leanderthals".
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Old 11-29-09, 12:13 AM
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I once had a rattle coming from the front end of my bike that I spent ages trying to diagnose, I went through and checked out every spoke on the front wheel, regreased the bearings in the headset, everything I could think of. I then looked and noticed that one of the nuts on my front wheel was loose. Ding! Problem solved.
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Old 11-29-09, 05:29 AM
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OP, I had a really annoying creaking noise similar to yours that really bothered me. I thought it was coming from the bottom bracket. Come to find out that the saddle was rubbing on the rails! I stuffed a clean rag between the saddle and the rails and my problem was solved!
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Old 11-29-09, 08:40 AM
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Around once every year or so I have a similar creaking problem. I found that by removing the saddle and seatpost, resting the saddle and post, upside down and on the ground with some light oil on all of the saddle bracket to saddle fittings, then leaving it sit overnight, my creaking problems are over.....for a year or so.
Hope this helps!
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Old 11-29-09, 09:19 AM
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Thanks everyone...the tightening of the seat rail bolts appears to have done the trick.
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Old 11-29-09, 09:28 AM
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glad your creaking was an easy fix
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Old 11-29-09, 02:40 PM
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Congrats, there is nothing worse that annoying bike problems, glad it was an easy fix!
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