Today I am offering a large FSA Vision Alloy TT outer chainring, in used condition, specifically designed for pure performance, aerodynamics, and speed. It is the preferred gear ratio for time trials (TT), triathlon, and very fast courses. With its 54 teeth and "solid" design (Aero Design), it offers maximum stiffness for optimal power transfer while minimizing aerodynamic drag. This chainring is designed to be ideally paired with a 42-tooth small chainring.
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