X-LAB RT9

The RT9 is X‑LAB’s ultralight climbing‑focused superbike, engineered to be as light as possible while still delivering top‑tier stiffness, responsiveness, and race‑level performance. At 6.2 kg, it’s one of the lightest production bikes available.

• Extremely lightweight: 6.20 kg / 13.64 lbs (size L)

• Premium carbon construction using Toray T1100 + M40X fibers

• World‑class component spec with Shimano Dura‑Ace Di2

• Branta C50 ULR carbon wheelset with carbon spokes (1,230 g)

• Integrated Branta carbon crankset with power meter + Apple Find My anti‑theft

• Technical 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, Apply 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

  TIRES

  Michelin Pro 5 700x28C

  SADDLE

  Selle Italia SLR Boost, Carbon Rails

  WEIGHT

  6.20 kg / 13.64 lbs (Size L)

  SIZE OPTIONS

  XS / S / M / L