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fourstroke FS03 29 XC

Our fourstroke has always been a race bike, built with potential to be a lot more. 29 inch wheels make this latest iteration more capable than ever before.


Racers looking for efficiency and responsiveness will not be disappointed, and it is also the perfect tool for all day mountain bikers riding challenging terrain. Uphill or downhill, the fourstroke simply got faster.


  • Frame Frame: APS (Rear Travel 100mm)
  • Tubing Tubing: Alloy Triple Butted, Hydroforming
  • Size Size: XS / S / M / L
  • Fork Fork: Rock Shox REBA RL
  • Rear Shock Rear Shock: Rock Shox Monarch
  • Gears Gears: 2 x 10
  • Chainwheel Chainwheel: Shimano SLX 38-24
  • Cassette Cassette: Shimano SLX 11-36
  • Chain Chain:  
  • Front Derailleur Front Derailleur: Shimano SLX
  • Rear Derailleur Rear Derailleur: Shimano XT Shadow PLUS
  • Shifter Shifter: Shimano SLX I-Spec
  • Brakes Brakes: Shimano SLX 180mm
  • Handlebar Handlebar: Scor MKII Flat Top Bar
  • Stem Stem: Easton EA50
  • Seatpost Seatpost: Scor MKII
  • Seat Seat: Selle Royal Seta
  • Hubs Hubs: Mavic Crossride Disc
  • Rims Rims: Mavic Crossride Disc
  • Tyres Tyres: Onza Canis ERA 2.25
  • Colour Colour: White
  • Weight Weight: 12.70 kg


size XS S M L
rider height cm < 165 165 - 174 170 - 182 180 - 195
stack mm 585 585 595 605
reach mm 385 412 434 456
seat tube st mm 400 420 460 510
top tube tt‘ mm 560 585 610 635
head tube ht mm 90 90 100 110
seat angle sa ° 73.5 73.5 73.5 73.5
head angle ha ° 70 70 70 70
rear center rc mm 445 445 445 445
bb drop mm 40 40 40 40


The geometry is built around the BWC (Big Wheel Concept). A longer top tube and slacker head angle, in combination with wide handlebars, make the handling stable and comfortable. Short chain stays, low bottom bracket and a short stem complete the concept by keeping the bike lively.

FS03 shares geometry and suspension design from its carbon brothers. We kept the weight low by using high-end, hydroformed and triple butted tubing. APS suspension, specially refined for big wheels in conjunction with the BWC, provides the perfect balance of comfort, control and efficiency.

The combination of big wheels, stable geometry and APS suspension makes the bike capable of overcoming any obstacle. High torsional stiffness improves steering precision and boosts confidence.
1) Frameset
-APS suspension, 100mm travel
-BWC 29er geometry
-12x142mm rear axle
-Frame weight (FS03): 2980gr including all hardware
-Hardware includes: Rear shock, chain guide, bolts, seat clamp, and rear wheel axle.
-Shock dimensions: 200x50mm

2) BSA 73mm

3) Integrated chainguide – Refer to specific manual

4) Initial load indicator – Convenient SAG adjustment

5) Tapered Headset – 1-1/8” to 1-1/2”

6) Natural born post mount
-Designed for 160mm discs
-Maximum 185mm rotors

7) Cable routing
-Continuous cable routing along the down tube



integrated skeleton concept

BMC has defined its brand name through technical advances.

The skeleton concept iSC (integrated Skeleton Concept) has been around since the first legendary promachine. Since then, the concept has spent over a decade being refined and redefined. The idea is saving weight by supporting the top tube at the seat tube and increasing the stiffness where it is needed. In the front triangle of the frame. With the help of the latest in FEM (Finite Elements Method) computer technology, we can tailor each tube junction perfectly to the distribution of forces. Cleverly selected skeletal reinforcement elements at the nodal points and the spread of the top tube distribute the impacting forces perfectly and result in BMC's typical crosslock. distribute the impacting forces perfectly.


advanced pivot system

Unsurpassed power transmission, traction control, and comfort.

The ideal suspension system converts all of a rider's energy into forward propulsion, while at the same time absorbing impacts. Mechanically, these two goals are at odds with one another. But BMC's APS rear suspension satisfies these two goals by carefully calculating the pivot points of the rear suspension so that inertial force generated under acceleration is not misdirected into compressing the shock.

How is this accomplished? With APS the virtual pivot point is positioned so that constant chain tension is maintained for forward acceleration. As such, pedaling forces are used for forward propulsion with no loss of energy transfer in the suspension system. At the same time, the shock system ensures optimum rear wheel traction, guaranteeing that those pedaling forces are not only getting to the rear wheel, but to the ground, as well. The end result is a suspension system that provides extreme power transfer efficiency, uncanny traction, and excellent comfort.



initial load indicator

Remarkably simple sag adjustment.

Just set the sag adjustment according to the indicator, and go. Trailside adjustments have never been simpler.

triple butted

Triple butted tube set

Triple-butted tube set made of a 6000 alloy. Triple-butted means that the tube has three different wall thicknesses.

Catalog 2014

team clothing

Order online now: Jersey Set of the BMC Racing Team is available for order now from our website.