Zipp knows the rigors our stems go through, and they're set on designing one that can handle it all. The SL Sprint Carbon A3 Stem is certainly up to the challenge of facing aggressive pack sprints, and we're excited to see a stem with just the right balance of stiffness and weight. It features a carbon construction that's the stiffest on the market gram for gram, and a +/-12 degree angle. This puts the stem angle at 77. 5 degrees relative to the steerer tube, which is a lot more aero than an 80-84 degree angle range which we're seeing with many other manufacturers. The SL Sprint comes with its own aerodynamically efficient stem cap that blends into the stem body. It's available in six sizes to suit any rider's fit needs.