Not that it should be, but if the shock is the limiting factor to suspension movement a shock with 5 inches of travel mount vertically / straight up and down, the suspension will have 5 inches of motion. The same shock mounted at about 30 degrees off vertical at full extension will allow about 6.5 inches of suspension motion. And of course, spring rate and situational loading is going to be a factor in the full usage of the suspension travel. And yes, as Joe H posted, the more angle off vertical shock mounting the more leverage the suspension travel will have over the dampening ability of the shock. But what BJR posted is incorrect, more shock angle does not equal less suspension travel. However, more shock angle does have less shock travel for the same amount of suspension travel.