On most modern sportbikes, the rebound adjuster is on top of each fork leg and the compression adjuster is on the bottom. The shock is opposite: Rebound is on the bottom and compression is on top, or on the reservoir. Some cutting-edge sportbikes have separate motorcycle suspension tuning for high- and low-speed compression. Often the adjusters will be labeled, though rebound is sometimes abbreviated “TEN” for tension. Very simply stated, compression controls how quickly the suspension collapses when you hit a bump in the road, while rebound controls how quickly it extends to its original position.