BMC Fourstroke 01 TWO

Fourstroke 01 is an XCO performance bike that exceeds the demands of the world’s top racers. On a mission to set the pace with our unique Autodrop technology and unrivalled APS dual-link suspension with 100mm of front and rear travel, it bests the competition in a Premium Carbon frame. This revolutionized racing machine arrives with integrated protection and is designed around the progressive BWC geometry, now accommodating two water bottles in the front triangle for long-distance missions. Stay ahead of the competition with the Fourstroke 01 TWO matched with a SRAM Gx Eagle AXS drivetrain, RockShox SID SL Select+ fork and RockShox SIDLuxe Select+ shock, DT Swiss XR 1700 wheelset with 25mm inner width and the BMC Autodrop integrated dropper seatpost.

Autodrop Technology
Your all-new secret weapon provides the first ever fully integrated, automatic dropper post for on-the-fly and squat-free seatpost dropping to push further faster, even on the most technical XC courses. With an intuitive two-position adjustment our lightweight Autodrop technology gives every rider the race-defining split-second advantage.

Optimized APS Suspension
More traction equals more speed and that is what we’re after. Next-level kinematics tuning, and best-in-class suspension performance delivers full traction, great efficiency, and active suspension on every terrain. Resulting in faster times, this new and improved full-feature suspension system finds no match on the race-course.

Go Long
This medal-winning marathon machine is versatile by design. Allowing you to go far, the Fourstroke 01 has been optimized to fit two water bottles and offers a tire clearance of 62mm to fit modern 2.4” XC tires.

Redefined Geometry
BWC Race is tailored to a fast and progressive racing style designed to attack the steepest and loosest courses with the improved 66.5˚ head angle and a long front-end. The 429mm short chainstays deliver power with proven traction on the most technical sections. The lowered bottom bracket and a steep 76.7˚ seat angle provide perfect weight distribution and handling.

Design Boost
Put the hammer down! The redesigned chassis excels in torsional and pedalling stiffness for unparalleled power delivery. A true performance leap that boosts one of the most successful XC race bikes on the scene to a new level.

User-Friendly Protection
The internal cable routing on Fourstroke 01 is guided through the front triangle, lower link and rear triangle, making service intervals a breeze. An integrated fork stopper, chainstay protector and the lower link mud flap protect the frame for improved durability with a custom port on the seat tube providing easy Autodrop maintenance access.

Full Specifications

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

Fork
Rock Shox SID SL Select+ - TwistLoc Lockout
Rear Shock: Rock Shox SIDLUXE Select+ - TwistLoc Lockout

Gears: 1x12
Chainwheel: SRAM Gx Eagle Carbon 34T
Cassette: SRAM Gx XG-1275 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 Autodrop 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 Mezcal 2.35"
Tire Clearance: 62mm (Measured Width)
Weight Limit: 110 Kg
ASTM Classification: Level 3

Technical Details & Manuals

Frameset
Fourstroke 01 Premium Carbon with Autodrop dropper seatpost, APS suspension system, 100 mm travel
Fourstroke 01 features Autodrop, an automatic dropper seatpost exclusive to Fourstroke 01 (from MY23).*

Technical Details
Autodrop seatpost, 80 mm drop
Advanced Pivot Suspension system
Big Wheel Concept Race geometry
Fully guided internal cable routing, including on lower link
Chainstay guard, invisible downtube shield, lower link mud protector
Integrated lightweight chainguide
Integrated fork rotation stopper
Metric shock, 190 mm eye to eye length, 45 mm stroke
100 mm fork travel, 44 mm fork offset
SRAM UDH Derailleur Hanger (Universal Derailleur Hanger)
ASTM level 3

Autodrop Technology
Automatic dropper post for XC racing: ultimate integration, featherweight, easy setup and maintenance
80 mm drop
2 positions adjustment
90 mm saddle height adjustment range

Compatibility
Frame, Fork and Seatpost
120 mm max fork travel
1x drivetrain specific
PF92 press fit bottom bracket
52 mm boost chainline
UDH rear derailleur hanger
2 waterbottle mounts on downtube (medium bottle size, side-entry bottle cage)
Autodrop seatpost only

Brakes: Post mount, 160 mm (Max 180 mm)

Wheels and Axles
29" x 62 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)