I'd like to pose a slightly different take on the "what tire pressure do you run" question to all you XC race types---is the lowest non-flating pressure you can run generaly the fastest for XC racing?
It seems the general trend, especialy from the no-tubes folks, is go-low. But in Ned Overend's book he talked about runing 45+psi, which would seem to result in lower rolling resistance. I've done some experiementation with my Paragon HT at 30,35,40, 45psi eventualy settling in at the lower end of that range becuase the ride was more comfortable and I could hold a line better as the bike wasn't jumping around as much, but I can't really objectively say that one setting was really slower or faster than another.
Anyone done any real testing on tire pressure vs. speed?
It seems the general trend, especialy from the no-tubes folks, is go-low. But in Ned Overend's book he talked about runing 45+psi, which would seem to result in lower rolling resistance. I've done some experiementation with my Paragon HT at 30,35,40, 45psi eventualy settling in at the lower end of that range becuase the ride was more comfortable and I could hold a line better as the bike wasn't jumping around as much, but I can't really objectively say that one setting was really slower or faster than another.
Anyone done any real testing on tire pressure vs. speed?