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SKU: XLRD-RT9BK-XS

RT9 DA Di2 BLACK

$11,499.00 RRP

  • World’s lightest production carbon road frame
  • A WorldTour-proven climbing bike
  • Highest performing commercial carbon fibre
  • Branta C50 ULR 50mm 1230g Carbon Wheelset

Colour

Black
Frame Size

RT9 DA Di2 BLACK

$11,499.00
|
Black
|
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X-LAB RT9 X-LAB RT9

X-LAB RT9

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.

The 550g Frame to Defy Gravity
The 550g Frame to Defy Gravity

The 550g Frame to Defy Gravity

When the goal is pure elevation, grams matter. The RT9 begins with a frame engineered to ~550 grams, built to feel weightless on the steepest pitches while staying composed under real-world power.

A Cockpit Built for Switchbacks

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

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.

The Branta Advantage is Exclusive to X-LAB The Branta Advantage is Exclusive to X-LAB

The Branta Advantage is Exclusive to X-LAB

See Our In-House Components

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Highlights

Key Features

Branta C50 ULR carbon wheelset with carbon spokes | 1,230 g

Branta C50 ULR carbon wheelset with carbon spokes | 1,230 g

Branta carbon crankset with integrated power meter + Apple Find My anti-theft technology

Branta carbon crankset with integrated power meter + Apple Find My anti-theft technology

Shimano Dura-Ace groupset

Shimano Dura-Ace groupset

XDS carbon frameset with Toray T1100, Full bike 6.2kg

XDS carbon frameset with Toray T1100, Full bike 6.2kg

Technical Specifications

Frame

XDS T1100 Carbon Frame

Fork

XDS Carbon Fork, 100x12mm Thru-axle

Gear Shifter

Shimano Dura-Ace ST-R9270

Front Derailleur

Shimano Dura-Ace FD-R9250

Rear Derailleur

Shimano Dura-Ace RD-R9250

Crankset

Branta Carbon Powermeter Crankset, 52-36T, 29mm Aluminum Spindle

Cassette

Shimano Dura-Ace CS-R9200, 11-34T

Chain

Shimano CN-M9100

Bottom Bracket

BSA 29mm

Rim

Branta C50 ULR, Carbon Spokes

Tyre

Michelin Pro 5 700x28C

Seat Post

XDS Carbon 27.2mm Seatpost

Saddle

Selle Italia SLR Boost, Carbon Rails

Handlebar

Branta Carbon Integrated

Stem

Branta Carbon Integrated

Front Brake

Shimano Dura-Ace BR-R9270

Rear Brake

Shimano Dura-Ace BR-R9270

*Continuous Product Improvement

Innovation never stands still. As part of our commitment to building the best possible bicycles, X-LAB reserves the right to update specifications, components, colors, and other product details at any time without notice. We make every effort to keep our published specifications current, but minor variations may occur between production batches. Please contact your local X-LAB dealer or Customer Support if you would like to confirm the latest specifications before purchase.

Geometry & Dimensions

FAQ

General
RT9 is for the rider who values weight savings above all else and spends long days climbing mile after mile. They are an experienced rider who values having the best equipment and has to have the pinnacle of carbon technology and innovation.
Yes, RT9 is easy to assemble. You can refer to the written assembly guide or our assembly video to help guide you through the process. If you have any questions or doubts about assembling RT9 yourself, we recommend having it professionally assembled at your local bike shop.
RT9 has a weight limit of 220lbs (100kg), which includes the rider and any gear or cargo.
Yes, the RT9 frameset and other major components (including cockpit, crank, and wheels) are available for purchase.
Any local bike shop will be able to provide general service for your RT9. For any component customization or warranty issues we recommend going to an X-LAB dealer to receive the best expert guidance and support.
Technical
RT9 has clearance for up to 30c tires.
Yes, the integrated power meter can connect to most major bike computers and fitness devices via ANT+. This allows live power data to be shared directly to your device. Live power data can also be shared via Bluetooth to the X-LAB Bikes app on your mobile device. At this time, live data can’t be shared to third party mobile apps via Bluetooth.
Yes, the RT9 frame is compatible with most wired and wireless electronic groupsets from all major drivetrain brands.
Yes, RT9 uses a UDH.
Yes, the aero cockpit is compatible with standard 2-bolt under-handlebar bike computer and combo mounts. A basic bike computer mounting kit is also provided with the bike.
RT9 can fit up to 55-42T 2x front chainrings or a 68T 1x front chainring.
Yes, X-LAB has 3 different size options for the integrated aero cockpit on RT9.
Yes, X-LAB offers numerous crank length options for the Branta carbon power meter crankset.
Yes, X-LAB offers both compact (50-34T) and race (54-40T) front chainring options, in addition to the standard (52-36T) front chainrings that come stock on the bike. The X-LAB chainrings have a standard 110 BCD bolt pattern but feature a unique shape to integrate with the integrated power meter.
The Branta power meter crank is dual-sided, meaning it measures power from both left and right legs separately.
Yes - the rims and tires on RT9 are tubeless ready and tubeless rim tape is already installed. Tubeless valves and sealant must be purchased separately.

Manual Downloads

Unboxing & Assembling

Unbox and Assemble your RT9

Unbox and Assemble your RT9

Media Reviews