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Polylube the Mute Button

March 9th, 2008 [print] Go to comments

One of the most important things to own for your bike is Park Tool’s Polylube.  Buy it in the tube and it’ll last for years.

With that out of the way, this is my story:

On both of my rides last weekend, I kept hearing a creaking/popping noise with every pedal stroke.  My bike is usually pretty quiet, so this was annoying the crap out of me.  I finally discovered the sound went away when I stood to pedal, which gave me an idea as to what it could be.

Right before the end of the riding season last fall, I bought an SDG seat and a Thomson Elite seatpost.  Not having much ride time with either of them, I figured one of them was to blame for this obnoxious creaking I was hearing.  Since the weather is nice enough that I may go for a ride today, I wanted to fix the problem before I had to listen to it for another two-hour ride.

Grabbing my seat and twisting it around (not that it moved more than a microscopic amount) once again created that same sound, so I decided to grab my Polylube and see if I could do something about it.  Thomson posts have a few very intricate parts that not only make assembly very tricky, but they also offer more spots for metal to be rubbing directly on metal.  So, once I got it apart, I lubed the rocker mechanism that sits directly atop the post and allows for infinite adjustment.  Then I applied some more to the top of that piece where the seat rails sit, and to the bottom of the upper seat rail mech, as well as the tiny, cylindrical nuts that hide in grooves cut into the top of it.  Finally, I polylubed the bolt threads, then carefully put it all back together (which is much more difficult than it sounds).

The result?  Absolute silence!  Not to mention parts that will last longer due to no longer having direct contact with one another.

Here’s a close-up of the bolt and cylindrical nut:

And here are the pieces that make up the seat rail clamping mechainism as well as a link showing a closeup of the assembled clamp:

 

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