Fourstroke 01

TWO

SRAM Gx Eagle AXS Drivetrain
Fox Float 32 SC Performance Elite Fork, Fox Float DPS Performance Elite Shock
DT Swiss XR 1700 Wheelset
8,999.00CHF
Other CurrenciesEURO €8499
CHF 8999
USD $8999
CAD C$12599
AUD A$
SCEuro €8999
Exceeding the demands of the world’s top endurance racers, with 100mm of front and rear travel, and the revolutionary RAD integrated dropper post, the Fourstroke is the most innovative XC race machine. Its lightweight Premium Carbon frame is designed around Big Wheel Concept geometry, has efficient APS dual-link suspension and integrated protection. A Fox Float 32 SC Performance Elite fork and equivalent shock, SRAM GX Eagle AXS groupset, and DT Swiss XR 1700 wheelset mean speed.

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Exceeding the demands of the world’s top endurance racers, with 100mm of front and rear travel, and the revolutionary RAD integrated dropper post, the Fourstroke is the most innovative XC race machine. Its lightweight Premium Carbon frame is designed around Big Wheel Concept geometry, has efficient APS dual-link suspension and integrated protection. A Fox Float 32 SC Performance Elite fork and equivalent shock, SRAM GX Eagle AXS groupset, and DT Swiss XR 1700 wheelset mean speed.

Innovation
Race Application Dropper

The first integrated XC dropper post provides a radical competitive edge by deliver the optimum riding position, uphill and down. It's RAD.

Advanced Pivot System (APS)

APS dual-link suspension technology allows you to pedal efficiently, brake hard, and charge rough terrain without compromise.

Lightweight Premium Carbon

The Fourstroke 01 features a full-carbon frame with a new, super-light carbon upper link. The premium carbon upper link that saves weight and provides a robust connection between the front and rear triangles.

Big Wheel Concept (BWC) Race

A radical approach to XC geometry, tailored to a fast and progressive riding style.

Integrated Fork Stopper

Engineered for optimized cable routing and frame protection. The integrated fork stopper protects the frame from impacts and allows a straight downtube design for improved stiffness and weight. The cable cover allows for clean cable entry and creates an additional protection layer.

Integrated Protection

Molded plastic covers on chainstay and lower link ensure durability and a clean finish.

Smart Cable Routing

End-to-end guided cable routing for hassle-free installation and reduced maintenance.

Technical Overview

  • Frame

    Fourstroke 01 Premium Carbon with APS Suspension SyStem, 100mm Travel
    • Fully Guided Internal Cable Routing
    • PF92 Bottom Bracket • Post Mount Disc
    • 12x148mm Boost Thru-Axle
  • Fork

    Fox Float 32 SC Performance Elite
  • Rear Shock

    Fox Float DPS Performance Elite
  • Chainwheel

    SRAM GX Eagle Carbon 34T
  • Cassette

    SRAM GX Eagle 10-52T
  • Chain

    SRAM GX Eagle
  • Rear Derailleur

    SRAM GX AXS Eagle
  • Shifters

    SRAM AXS Controller
  • Brakes

    SRAM Level TLM / SRAM Centerline Rotors (160/160 S-M, 180/160 L-XL)
  • Handlebar

    BMC MFB01 Carbon 760mm
  • Stem

    BMC MSM01
  • Seatpost

    BMC RAD, Integrated Dropper Seatpost
    • 80mm Drop
  • Saddle

    Fizik Antares R7
  • Hubs

    DT Swiss 350 Straightpull, Ratchet 36 SL
  • Rims

    DT Swiss XR 1700 Wheelset, 25mm Inner Width
  • Tires

    Vittoria Barzo 2.25
  • Tire Clearance

    58mm (Measured Width)
  • Weight

    11.10kg / 24.47lb
  • Weight Limit

    110kg / 242lb
  • ASTM Classification

    Level 3

Fourstroke 01 TWO Cross Country Mountain Bike

Size S M L XL
Rider Height CM <172 172-182 180-188 >188
Stack MM 580 590 600 615
Reach MM (reach) 423 445 465 485
Seat Tube MM (st) 420 440 480 510
Top Tube MM (tt) 582 607 630 654
Head Tube MM (ht) 96 107 117 134
Seat Tube Angle (sa) 75.6 75.6 75.6 75.6
Head Angle (ha) 67.5 67.5 67.5 67.5
Rear Center MM (rc) 429 429 429 429
Front Center MM (fc) 700 726 750 777
Wheelbase MM (wb) 1129 1155 1180 1206
BB Drop MM (drop) 44 44 44 44
Fork Length MM (fl) 506 506 506 506
Fork Rake MM (fr) 44 44 44 44
Trail MM (trail) 106.5 106.5 106.5 106.5
Crank Length MM 170 175 175 175
Stem Length MM 50 60 60 70
Stem Angle -5 -5 -5 -5
Bar Width MM 760 760 760 760
Bar Rise MM 4 4 4 4
Backsweep 8 8 8 8
Seatpost Drop MM 80 80 80 80
Standover Height mm 738 747 759 768

Frameset

  • Fourstroke 01 premium carbon with APS suspension system, 100 mm travel

Fourstroke 01 features Race Application Dropper seatpost, the world's first and lightest integrated dropper post. The RAD seatpost is specific to Fourstroke 01 frames starting from MY19.*


Technical Details

  • Advanced Pivot Suspension system
  • Race Application Dropper (RAD) seatpost, 80 mm drop
  • Big Wheel Concept Race geometry
  • Fully guided internal cable routing, including on lower link (hidden link)
  • Molded chainstay guard, chain suck protection plate, invisible downtube shield, lower link mud protector
  • Integrated lightweight chainguide
  • Integrated fork stopper with cable guiding and frame protection functions
  • Metric shock, 185 mm eye to eye length, 50 mm stroke, trunnion mount, 20x8 mm hardware
  • 100 mm fork travel, 44 mm fork offset
  • ASTM level 3

Race Application Dropper (RAD), Integrated Dropper Seatpost

  • The first integrated dropper post for XC racing: ultimate integration, featherweight, easy setup and maintenance
  • 80 mm drop
  • 2 positions adjustment
  • 90 mm saddle height adjustment range

Sizes

S, M, L, XL


Frame Weight**
2270 g

Seatpost Weight***
345 g


Compatibility

Frame, Fork and Seatpost

  • 100−120 mm fork travel
  • 1x drivetrain specific
  • PF92 press fit bottom bracket
  • 52 mm boost chainline
  • Replaceable standard or direct mount rear derailleur hangers
  • 1 waterbottle mount
  • RAD dropper seatpost only

Brakes

  • Post mount, 160 mm

Wheels and Axles

  • 29" x 58 mm tire clearance
  • 12x148 mm boost rear axle

*Notes about proprietary technology

**Weight for the lightest finish, including complete hardware with size M frames

***Average sample weight (w/out lever)