Reserve

RD1 Carbon One Piece Handlebar

What Our Gearhead® Experts Are Saying:

"The RD1 is one of the most complete one-piece cockpit solutions available right now for a rider who wants genuine aero gains without giving up ride quality or fit flexibility. The internal routing is executed cleanly, the size matrix covers enough combinations to dial in most riders, and the 29-second advantage over 40km is a number that holds up in the real world, not just the tunnel. For a World Tour level bar at this weight and price, the lifetime warranty is the kind of backing that makes the decision straightforward."

One-piece integrated cockpits represent the most significant aerodynamic gain available to a road racer without changing the engine doing the work. Eliminating the junction between bar and stem removes a turbulent transition point in the airflow over the front of the bike, and routing cables fully internally removes the remaining drag sources that conventional setups accept as unavoidable. The Reserve RD1 Carbon One Piece Handlebar was developed with both of those principles applied without compromise, delivering a 29-second improvement over 40km compared to the other bars included in wind tunnel testing. At the speeds where road racing and criterium competition are decided, that margin is not incremental. It is decisive.

The aerodynamic profile of the RD1 is developed around a fully internal cable routing architecture that accommodates both mechanical and electronic drivetrain systems, routing everything from brake lines to shift cables through the bar body and out of the airstream entirely. The bar is built around the Acros ICR headset standard, a fully integrated design that eliminates the exposed stack of a conventional headset and stem interface, but Reserve has ensured compatibility with most bikes that use a standard 52mm oversized upper headset bearing to avoid limiting the RD1 to a narrow range of frame specifications. The 6-degree stem angle provides a moderate drop from bar top to stem clamp that suits a wide range of rider positions, and the 6-degree flare opens the drops slightly for improved control and comfort on longer efforts and technical descents.

The geometry of the RD1 is deliberately chosen for versatility across the riding contexts where a one-piece aero cockpit makes the most sense. A 75mm reach measured center to center sits at a length that supports sustained aerodynamic positioning without creating the handling instability that very short reaches can introduce in fast or technical situations. The 125mm drop center to center is deep enough for a committed race position in the drops while remaining accessible for riders transitioning from more relaxed setups. Stack height of 35mm keeps the overall front end profile low and clean. The size matrix spans handlebar widths from 360mm through 420mm and stem lengths from 80mm through 120mm, covering ten specific size combinations that address the majority of competitive road rider fit requirements.

Claimed weight runs from 301g to 341g across the size range, figures that are competitive for a one-piece carbon cockpit at this level of aerodynamic development and structural specification. No rider weight limit applies, and the lifetime warranty with Reserve's commitment to getting riders back on the bike quickly under normal riding conditions makes the RD1 a long-term investment rather than a consumable race component. For road racers, criterium specialists, and fast group riders building a cockpit around maximum aerodynamic efficiency and genuine ride quality, the Reserve RD1 is the front end the rest of the build deserves.