yeah, turning the knob on the reservoir clockwise will make the compression of the shock harder. the spanner nuts on the shock body that is against the spring will adjust preload on the spring for the amount of sag you want and will also affect ride height. the knob on the bottom of the shock at the mounting bolt will change how fast the shock will extend after it has been compressed. just turn it all the way one way and push the bike down and it will come up fast and all the way the other way it will come up very slowly. just adjust it to your liking.