Ridley has taken advantage of UCI rule changes with its new Dean Fast time trial bike to improve aerodynamic performance.
The Belgian brand claims the updated version of its time trial bike produces less drag due to a reduced frontal area and elongated tube shapes.
The Dean Fast comes with a mountain-bike style Universal Derailleur Hanger and can accept up to a 60T chainring in a 2x configuration.
We expect Ridley-sponsored men and women to race the Dean Fast in 2023 UCI World Championships time trials. Drag reduction measures
The Dean Fast frameset is a blank canvas to be specced as the rider pleases. Ridley
The ‘3:1 rule’ meant the length-to-width ratio of bike frame tubes used in UCI competitions could not exceed three.
UCI rule changes relaxed the ratio to 8:1, allowing manufacturers to deepen tube shapes into a more aerodynamic profile.Ridley has capitalised on the relaxed regulations by elongating the head tube of the Dean Fast.The brand claims this reduces the amount of turbulence that flows behind and causes drag.Ridley says it has also benefited from the UCI easing restrictions on tube shape design.The stem sinks into the head tube, which extends back further than before in an hourglass shape. Ridley The new hourglass shape of the head tube “strategically shapes airflow” and diminishes the frame’s front profile, according to the brand.As before, the stem sits flush with the top tube, which is also claimed to reduce drag.Ridley has applied a textured surface, similar to the dimples on a golf […]