Bitubo Racing shocks makes a fully adjustable for spring preload, rebound, and high speed compression damping rear shock. The shocks for the TL's weight less then 4 1/2 lbs! The Bitubo shocks replace the rotary damper and the "spring on a stick" for both the TL1000R and the TL1000S. Your weight savings will be in excess of 9lbs! In addition to the tremendous weight savings you get a superior damping unit that will absorb bumps better, give you better traction, support the weights you will be carry better, and give you a more comfortable ride. We have different spring rates available for the shocks based on your weight, passenger weight, and how you are using the bike.