Watch the Rollin' online guitar lesson by Freekbass from 50 Freekbass Licks You MUST Know
This line is at the very groovy tempo of 72bpm, nice and laid back. To make this line really happen, you need to not only get the notes and technique down, but the feel is also important.
With lower bpm you want to make sure your feel is not dragging at all, but you do not want to rush it either. As a good musician friend once told me, just let whatever the tempo is, let it be. In other words do not think slow or fast in your head, or you will probably play it slow or fast. When you are enjoying a nice walk, you are not usually thinking about how fast or slow you are walking you are just walking so when you play a groove like this or others, just be playing.