Control Tech CLS ±17° Drop StemITEM: RAS 117 Built from 3D forged 6061 aluminum. Forged is significantly stronger than cast methods of building but requires less material, for a stiffer, lighter stem. Faceplate is constructed from 7075 aluminum, with a strength comparable to steel. Easily flips to give a 17 rise or drop depending on your aerodynamic ambitions. Correct stem length is vital for comfortable bike position and good handling, so the CLS Drop Stem comes in six sizes, from