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Full Suspension > FOURSTROKE FS01

Fourstroke FS01

The newly modeled APS suspension system combines efficient propulsion, excellent traction and comfort – exactly what every racer is looking for. The wide seat tube connects the load transmission points more directly, improving rigidity in the front frame triangle. Features such as the natural born post-mount and end-to-end, neatly laid cable housing give the bike a compact appearance and ensure worry-free performance.

This full carbon, full suspension frame weight 1900 grams, not including shocks, and integrates our combined years of experience in developing bicycles. The best materials, most modern production methods and unique Integrated Skeleton Concept result in an outstanding ride experience. The Advanced Pivot System and monocoque rocker arm provide for efficient energy transmission, secure rear wheel to ground contact and a controlled, agile ride feel all combined with the best absorption characteristics available.

By employing CNT carbon nano tubes and using exclusively unidirectional carbon fibres, we can achieve consistent rigidity at a very low weight. The specially designed shock absorber, the appropriate suspension fork, and the high-quality components group supplement this dream bike.

Available in frameset only. Colour as shown.

Frame building in a Multi Moulding Procedure - Manufactured using the Multi-Moulding Procedure: all heavily loaded areas of the frame are manufactured from a single part, the connection of the individual frame sections is always affected in the areas where the smallest forces will be exerted. In combination with the exclusive use of unidirectional carbon fibre and the mixture of CNT Carbon Nano Tubes (microscopic carbon tubes) in the resin, we have achieved optimal rigidity with significant weight savings.

iSC integrated Skeleton Concept - The iSC provides for a perfect transmission of power and distribution of forces in the juncture point from the top tube to the heavily loaded seat tube. Thus the efficiency of the propulsion as well as the rigidity increases while the frame weight is reduced.

APS Advanced Pivot System - Provides reliable suspension in any situation while ensuring efficient forward propulsion with no pedal power getting absorbed by the suspension. The entirely closed rear triangle is a monocoque fabrication. This increases the rigidity and reduces weight. The upper and lower pivot arms (rocker arm and lower link) that connect the front and rear triangle are CNC treated after manufacturing. This leads to an additional reduction in weight without compromising the rigidity.

Carbon Dropouts - Another intricate detail; boasts is the use of carbon dropouts for the frame. These help to further reduce the overall frame weight.

Frame - first MTB frame in the world to be completely manufactured using the Easton CNT Nano technology; frame built exclusively with unidirectional carbon fibers

  • - system integration with new Fourstroke FS01 carbon TCC seat post
  • - natural born postmount rear brake calliper mounting and initial load indicator for easy and hassle free suspension set-up rear shock FOX rP-2 with Pro-Pedal and rebound adjust
  • - All bolts made from aluminum
  • Torque of rocker arm to the frame = 6-8Nm
  • Torque of lower link to the frame = 6-8Nm
  • - the maximum certified disk brake diameter is 185mm for frame and fork
  • - front/derailleur = clamp type, 34.90mm, down swing dual pull. (Torque = 5Nm)
  • - frame weight = 1900gr. (size Large/without shocks)
  • - 4 frame sizes (S / M / L / XL)
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Bottom Bracket - size / width - BSA 1.37x24 / BSA / 68mm cup width

Kinetics/ shock absorber - APS full suspension technology
- rear shock = FOX RP-2 with Pro Pedal & rebound adjust
- shock length= 200mm
- compression travel = 57mm
- shock width top end / bottom end (body eyelet) = 22.20mm
- shock installation bolts top / bottom = 8mm
- rear shock & suspension fork adjustment technical manual appendix N°12.

Suspension fork - BMC recommends using a suspension fork with a maximum of 100mm to 110mm suspension travel

available in frameset only. colour as shown.

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