This weekend I demoed a Specialized FSR Comp 120. It is a beautiful bike, with great geometry and I wanted to experience the "always active" rear suspension that Specialized keeps advertising.
What a huge disappointment! The bike bobbed like crazy, more than any other FS bike I have ever tried out - and I demoed lots of them in the past 2 years.
So let's rationalize this: if the bike is built to remain active under pedaling and breaking, then the only thing that is going to save you from bob is a shock built with a ProPedal (or similar) setup. Well the bike comes with a Fox ProPedal Septune shock (it has seven settings hence its name) and even in the stiffest setting the bob was ridiculous. Either the blow-off valve was not working or the bike just sucks. I cannot believe this bike sucks, so I have to conclude that the shock was faulty. There were others who noted this and we told the Specialized person that bob was a serious problem. He indicated that it is OK and he even races with this bike. Well that took away some credibility, since NOBODY would race on such a setup.
I tried other trail bikes (Jamis XLT, Marin Mount Vision) that were superior to the Specialized in managing bob. And these are 4-6 in travel bikes! So what gives?