I Have a Lynskey Helix Pro disk frame and my goal was to build as light a bike as possible. After installing SRAM Etap HRD Disk, I have been looking for the lightest and beautiful parts to complete my dream bike. Zipp Carbon SL Speed stem fit perfectly with Zipp Speed Aero SL 70 Aero handlebar. I think i could not have made better choice and I am very happy with it. Will recommend it to everyone who want to have a beautiful cockpit.