Does Adjustable Hydraulic Bottom Out affect the spring rate? No, Adjustable Hydraulic Bottom Out does not affect the spring rate; it increases compression damping in the last 20% of travel to help prevent harsh bottom outs. Related articles What does each click of Adjustable Hydraulic Bottom Out do for the feel of my RockShox Super Deluxe Coil? What do I do if I’m experiencing bottom outs with Hydraulic Bottom Out? Does Hydraulic Bottom Out provide any degree of rebound damping as the shock begins to rebound after bottom out? What is the difference between positive and negative Token tuning in RockShox DebonAir+ rear shocks? How far can I adjust the High Speed Compression (HSC) and Low Speed Compression (LSC) on Rockshox RC2T dampers?