The Zipp SL Speed 6 Degree Stem is designed  using SRAM Exogram™ technology, found in SRAM RED cranks. The new SL Speed Stem weighs just 123g (100mm) while exceeding our stiffness-to-weight standards.  Zipp SL Speed 6 Degree Stem Features Designed using SRAM Exogram™ technology New SL Speed Stem weighs just 123g (100mm) 6° carbon stem Material (SP/ST):  Unidirectional Carbon Length (ST):  100mm, 110mm, 120mm, 70mm, 80mm, 90mm Stem angle/rise:  6 degrees Clamp diam:  31.8mm Steerer clamp diameter:  1-1/8 in Colour/finish (ST):  Natural carbon Hardware:  Titanium Weight Based On:  100mm stem