The Carbon Torsion Arch (CTA) unites the seatstays to create an exceptionally rigid structure. With this uber-stiff carbon composite member in place, the chance for unwanted torsional deflection in the rear suspension is eliminated. Its strength and stiffness do not come at the expense of lightness. We mold it as a monocoque, along with the seatstays, with high modulus Toray carbon fiber. Go ahead; ride harder and deeper into those clapped-out berms, the added stiffness delivers unparalleled traction and control.