The noise is of little concern compared to how harsh they are on the open road. Anything more than an inch and a half or so of travel and they are nothing short of brutal on a bumpy road at highway speed. I sold mine after my head hit the ceiling a few times and almost hurt my back on our local highways.
Interesting. I thought they only came into play if you were accelerating and the axle was trying to wind up as opposed to just vertical motion.
Another question to throw out there on the Caltrac front: Are many people having issues with ground clearance problems with the Caltracs?
