X-Lab RT9 700c Carbon Frameset

X-LAB’s ultralight climbing platform, built around a production carbon frame engineered to approximately 550 grams. Designed for riders who want elite stiffness, low weight, responsive handling, and a frameset ready for the highest-performance climbing builds.

• World’s lightest production carbon road frame
• A WorldTour-proven climbing bike
• Highest performing commercial carbon fiber
• Platform of Velo's Everest Roam (June 2026)

The RT9 redefines what is possible in lightweight performance engineering.

Constructed from Toray T1100 carbon and refined through extensive structural analysis, the frame weighs an astonishing 550 grams while maintaining the stiffness and durability required for elite racing.

The result is a machine built for the purest expression of climbing performance with instant acceleration, unmatched efficiency, and effortless elevation gain.

The RT9 is the lightest production road bike frame in the world. Period.

Key Features

A Cockpit Built for Switchbacks

Every touchpoint is designed for climbing: a lightweight, responsive integrated cockpit that keeps the front end precise when the road turns vertical and the pace turns personal.

Seamless Integration, Elite Efficiency

From seatpost to tube junctions, RT9’s integration is obsessively refined to complement an all-out climbing machine with cleaner lines, cleaner airflow, and a ride that feels like perpetual poetry in motion.

Specifications

Sizing & Geometry

Video

WARNING: This product contains chemicals known to the State of California to cause cancer reproductive harm

The products in this store may expose you to chemicals such as Nickel which are known in the state of California to cause cancer, and Bisphenol A (BPA) which is known to the state of California to cause birth defects or other reproductive harm.

For more information go to https://www.p65warnings.ca.gov