Looking for a super stiff stem that really makes the grade Make the intelligent choice and go with a ViceVersa GPa4.8. Let us school ya: the GPa4.8 is named for the Tensile Modulus of Carbon. If that's too much to wrap your head around, call your high school physics teacher you know, the guy with the pocket protector and all the pens he'll help you. Anyway, the GPa4.8 is engineered not only for stiffness, but also for safety, which is very smart on a 100kph descent. Special attention has been given to strength, especially in the faceplate design. High modulus, Venus C7 carbon fiber runs throughout the GPa4.8, resulting in exceptional damping qualities, not to mention a wicked look. Extensions go from 90 to 130mm. Weight at 110 is just 160g. Bore is 31.8mm. Fork steerer OD is 1 18 or, for you metric nuts, 28.6mm. You put the screws to the GPa4.8 at a torque of 8Nm front and 8Nm rear. The finish is glossy without being bling bling. And, of course, the 80 angle allows for a significant rise in your Gpa. 160 Grams.