Hidden seatpost clamp reduces drag
Dropped seatstays reduce the aerodynamic signature of the Noah SL
The Noah SL’s frame has been built out of a super strong blend of differing strength carbon fibres, ranging from 60 ton to 30 ton high modulus unidirectional carbon fiber (higher ton rating = stronger carbon, stronger carbon = stiffer and lighter frames)
Press Fit 30 Bottom Bracket: Advantages to this system is weight savings, a narrow Q-factor, greater bearing durability, and simple installation
Oversized tapered headtube; the increased surface area adds rigidity and helps dissipates vibration
Ridley F-Surface coating: Frontal wind has to "pass around" the tubes of the bike, and has to change its direction to follow the profile of the bike. To make it easier for the airstream to follow the profile of the bike and stay close to the bike, the tubes are designed in a droplet shape. However, even then it's not possible to keep the airstream in touch with the frame at every location. At locations of severe angle change the airstream releases the frame, creating a wake on these locations which increases the drag. Ridley did extensive wind tunnel testing and used oil mapping technology to locate the places where the wind releases the frame. To avoid the airstream releasing from the frame on these locations, we apply a textured surface on these locations in order keep to the wind close to the frame. As oncoming wind passes around the bike the F-Surface reduces drag on the Noah SL by ~4.16% by increasing the laminar flow
Ridley is a name that has long been associated with winning teams in the professional cycling world. All of Ridley’s publically available bikes have been developed using key features born on true world class race bikes. Ridley develops their frames from the ground up, from aerodynamic testing, to making their own molds for the raw carbon frames

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Ridley Noah SL40 Road Bicycle - Unisex