Bar Heights
Low Bar - 68mm
The easiest way to decipher bar height is by the location of the elastomer bolt. Notice on the low bar in the photo below, the elastomer bolt threads directly into the center section. There's a locking nut pressed into the center tube, so no elastomer nut is visible.
Standard Bar - 92mm
Again, the easiest way to determine the bar height is based on the elastomer bolt. Notice below on the standard height bar that the entire elastomer bolt is visible. However, the bolt head is machined and it's resting on the 1 1/8" center tube.
Tall Bar - 116mm
Notice in the photo below, on the tall bar the entire elastomer bolt is visible but there's no need for the machined bolt heads as there's about an inch between the elastomer bolt head and the 1 1/8" center tube.