Most importantly though, @crikeymike provided extended and compressed lengths. Too many variations in lifts and rigs these days to have any semblance of apples to apples. For example...I am running the Dobinson 2" tapered coils (sorta like the slinky coils) that require a longer than normal shock to get all the effective down travel they create. My Icon 2.0 (0"-3" lift) shock is about 2" too short fwiw. Always better to measure!It'd be nice if suspension suppliers would correlate these numbers to actual center hub to wheel well openings (flare/non flare).