The Zipp SL Speed Stem is a lightweight and versatile piece of equipment that makes a great addition to a road climbing bike. It is made with a unidirectional carbon fiber for a featherweight build. It also boasts an incredibly stiffness to weight ratio, making it an explosive sprinter in addition to its outstanding climbing ability. The SL Speed Stem is designed using the same SRAM Exogram technology that is found in world-class SRAM Red cranks, helping it drop weight while maintaining stiffness. This version has a rise of 6 degrees and is available in six different length options. Note that this version accommodates 1 1/8-inch steerer tubes. The Zipp SL Speed Stem is an elite piece of equipment that will keep you in the proper position and help drop time on the most challenging rides.