[Xela]

120 psi is most likely too high for you. See the thread on tire pressures here...

http://www.twospoke.com/forum/f82/tire-pressures-572/

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[Xela]

I've been riding mine around the value recommended by the chart (105 to 110 instead of 120) and it has only been a positive difference. The ride is much smoother now, and I actually think it corners better because some of the small bumps are being soaked up by tire deflection.