Joined: May 2009
Posts: 1,208
Likes: 2
From: Whitestown, IN
Bikes: Fisher Opie freeride/urban assault MTB, Redline Monocog 29er MTB, Serrota T-Max Commuter, Klein Rascal SS, Salsa Campion Road bike, Pake Rum Runner FG/SS Road bike, Cannondale Synapse Road bike, Santana Arriva Road Tandem, and others....
I don't know what a 240lb rider can get away with, but at 170lb I will only drop my Extremes down to 40psi. Any lower and I can feel the sidewall flexing too much on any kind of impact, and I worry about pinch flats. For what it worth, I would suggest that you not go below 50psi without some testing....