Rails NACK
The in-house to Prologo term "Nack" identifies the range of saddle rails with a monocoque carbon structure. Made from a mix of carbon fibre, Kevlar and an alloy, Nack rails provide an excellent weight to stiffness ratio. The "BRC" (Braided Carbon Rail) carbon fibre, developed by Prologo's R&D department, allows a high torque to be used when fitting the saddle to the saddle clamp for even more reliability and stability.