X-Lab RT9 700c

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

• World’s Lightest Road Frame (550g)
• WorldTour Climbing Bike
• Toray T-1100 Carbon
• Branta C50 ULR 50mm 1230g Carbon Wheelset

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

FRAME: XDS Carbon Frame, Toray T-1100 + M40X, UDH Compatible  
FORK: XDS Carbon Fork, Toray T-1100, 100x12mm Thru-axle  
HANDLEBAR / STEM: Branta Carbon Integrated  
SEATPOST: XDS Carbon Seatpost, 27.2mm  
REAR DERAILLEUR: Shimano Dura-Ace RD-R9250 Di2  
FRONT DERAILLEUR: Shimano Dura-Ace FD-R9250 Di2  
SHIFTERS: Shimano Dura-Ace ST-R9270 Di2  
BRAKES: Shimano Dura-Ace BR-R9270  
CASSETTE: Shimano Dura-Ace CS-R9200, 11-34T  
CRANKSET: Branta Carbon Power Meter Crankset, 52-36T, 29mm Alloy Spindle, Apple Find My Anti-Theft Technology  
BOTTOM BRACKET: BSA 29mm  
ROTORS: Shimano SM-MT900, F:160mm R:140mm  
CHAIN: Shimano CN-M9100  
WHEELSET: Branta C50 ULR, Carbon Rims & Spokes, Ceramic Bearings  
TIRES: Michelin Pro 5 700x28C (Max Tire Clearance: 30C)  
SADDLE: Selle Italia SLR Boost, Carbon Rails  
WEIGHT: 6.20 kg / 13.64 lbs (Size L)  
SIZE OPTIONS: XS / S / M / L

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