I recently purchased an 03 trek liquid 20. Love the bike so far but th erear shock has some issues so I am looking to upgrade. Still sporting the original Fox Float R and am looking to drop a Rockshock monarch plus in its place. Before I buy a new shock I am trying to get an idea on what volume setting I need and what the different setting entail. They have a low, med and high volume set up, I weigh about 185 lbs. Any info can help, thanks