Fashioned from a mere 102 grams of full-carbon awesomeness, Zipp's SLSpeed proves that a super-light stem doesn’t have to compromise on stiffness, strength or reliability. To make the most of every gram, the SLSpeed’s unidirectional-carbon body contains no embedded metal and its rearward-facing bolts thread directly into the dimpled titanium faceplate to minimize weight and boost aerodynamics. And, the single, self-aligning bolt at the steerer clamp reduces long-term stress on the front end.
Stem angle is one of the factors that determines handlebar height. A listed angle of 0 degrees actually provides a rise of 16-20 degrees, depending on the bike's head-tube angle. Flexible, athletic riders prefer lower-rise stems, while recreational riders usually favor higher-rise stems.
Clamp diameter: 31.8mm
Steerer size: 1 1/8 inch
Rise: +/- 6 degrees
Weight: 102 grams (100mm)