The Phibra’s unique frame design incorporates Carrera’s "2b double arc block technology", which uses two arc-shaped high-modulus carbon fibre blocks to form the frame’s backbone. The upper "block" starts at the head tube flows through the top tube to the rear monostay, and then finishes at the rear dropouts. The lower "block" similarly integrates the down tube, bottom bracket shell, and chain stays. An integrated seat mast joins the two together. Read a recent review of the Phibra in Road Bike Action magazine.
High stress areas of the Phibra frame are reinforced by a carbon-titanium weave. A massive bottom bracket zone and over sized chain stays insure efficient power transfer. An aero Carrera Thunder monocoque carbon fork, a tapered head tube and internal cable routing round out the package.
The Estremo possesses high modulus carbon fiber, carbon-titanium and vectran weave in high stress areas and a striking paint scheme.
