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bike crackles like popcorn
My wife just got a Giant OCR1 bike with a carbon fiber seat post.
There is all kinds of crackling noise (like popcorn popping) when you move around on saddle. Is it the seat post or saddle? Do carbon fiber seat posts make this noise. I tried tightening it, but it did not help. Thanks, Greg |
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#2
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bike crackles like popcorn
Greg Wrote: My wife just got a Giant OCR1 bike with a carbon fiber seat post. There is all kinds of crackling noise (like popcorn popping) when you move around on saddle. Is it the seat post or saddle? Do carbon fiber seat posts make this noise. I tried tightening it, but it did not help. Thanks, Greg I suggest taking the saddle off and lighly greasing the rails where they interface the the seat post. Check for proper lubrication of the saddle rail binder bolt(s). I would also give everything in that seatpost area a close look... for cracks. Check your seat post "collar" and make sure there is proper lubrication of the bolt and female threaded portion. I would check with your Giant dealer on this as well as reading the owners manual. "Thread Preparation There is resistance to turning the bolt, as the fastener gets tighter. Some resistance comes from friction and rubbing between the internal and external thread surfaces. Because of this, it is common to prepare the threads with lubrication. This can take for form of liquid lubrication, grease, or an anti-seize compound. Even liquid thread-lockers provide some lubrication during tightening. As a simple rule of thumb, if the thread size is small, such as a derailleur pinch bolt, a liquid lubricant is adequate. If the thread is large or the torque relatively high, such as a pedal thread or bottom bracket, use a grease or anti-seize compound. There are situations, however, where a manufacturer may recommend no lubrication on the fastener. If is useful to lubricate the threads and under the head of the bolt, especially when the bolt head is turned during tightening." from Park Tool Repair section at URL: http://www.parktool.com/repair_help/thread.shtml There is a section on torque in common bicycle fasteners that you might want to check: http://www.parktool.com/repair_help/torque.shtml -- daveornee |
#3
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bike crackles like popcorn
There is all kinds of crackling noise (like popcorn popping) when you
move around on saddle BRBR grease on the saddle rails Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene" |
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