Bontrager Harmonic Dampers

I have not used them but intuitively, for me, it would seem they should work. I notice that I get a bit more vibration through my bike if I use my lined aluminum h2o bottles in place of plastic bottles or do not have my saddle bag on which I believe to absorb some unwanted vibrations. I also use dampening techniques on my home stereo which "eats" unwanted sound waves. Weather this applies to road vibrations I don't know.

I have them on my bike, as I am riding a new Trek. It seems to help some. Due to my size, I ride about 120psi, so without them I'd feel a ton of road vibration. Now it's pretty minimial.

-Matt

I put a pair on my gf's bike because the roads we ride are horrific and her hands were starting to go numb. She reported a slight improvement, but every little bit helps.