Take the 2-minute tour ×  What are the signs that a fork needs
an oil change?  I'm asking this because lately my RS Revelation
(1yo) seems stiff. I checked the sag and found I should increase
it... so I did, but it's still using almost the same amount of
travel (I check the o-ring at the end of a ride). Moreover, on
rough terrain (gravel), I feel an incredible amount of
vibrations that hurt my fingers.  Are these the signs? (in other
words: will an oil change solve these problems?)  share|improve
this question add comment  2 Answers  up vote 4 down vote
accepted  Over time forks become less responsive (move slower
basically), but as this effect happens over the course of 12-18
months (the usual fork oil and seal lifetime), it's difficult to
notice as you just get used to it. So most fork manufacturers
tell you to change it after so many miles.  This responsiveness
loss happens for a couple of reasons on different types of
damping systems, on mine (Boxxers) it's because of pollutants in
the oil itself - 'dust'