The grease fill gives a damping affect - very nice, some of the best performing gear I have had. Mine are now starting to sag some after about 40 flights. I haven't opened them up yet, but I am sure they have springs. I really don't want just springs, though - I want to keep the damping effect.
Greg
Last edited by gsmarino2000; 08-30-2015 at 04:12 PM.