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.
Specifications
Frame: APS (Rear Travel 100mm)
Tubing: Carbon
Size: S / M / L 
Fork: Fox 32 Float CTD Adj FIT Factory Kashima 100mm
Rear Shock: Float CTD BV Factory Kashima 
Gears: 3 x 10
Crankset: Shimano XTR, 42-32-24
Cassette: Shimano XTR, 11-36
Front Derailleur: Shimano XTR
Rear Derailleur: Shimano XTR Shadow PLUS
Shifter: Shimano XTR I-Spec
Brakes: Shimano XTR 180mm ICE-Tech
Handlebar: Easton EC70 XC Flat
Stem: Easton EA90
Seatpost: Easton EC70 Zero
Saddle: Tundra 2 Braided
Hubs: Easton EA90 XC
Rims: Easton EA90 XC
Tyres: Continental Race King 2.2
Colour: Brown
weight: 10.45 kg
Pedal:
Geometry
Glossary
- s
- Seat tube
- tt
- Top tube
- ht
- Head tube
- ha
- Head tube angle
- sa
- Seat angle
- rc
- Chain tube
| Size | s | tt | ht | stack | reach | ha | sa | rc | drop |
|---|---|---|---|---|---|---|---|---|---|
| S | 420 | 585 | 90 | 585 | 412 | 70 | 73.5 | 445 | 40 |
| M | 460 | 610 | 100 | 595 | 434 | 70 | 73.5 | 445 | 40 |
| L | 510 | 635 | 110 | 605 | 456 | 70 | 73.5 | 445 | 40 |
| Rider height | Bar width | Stem extension | Crank length |
|---|---|---|---|
| 165 - 174 | |||
| 170 - 182 | |||
| 180 - 195 |
Concept
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.
Efficient
A race bike must be light, and with a complete frame weight at 2kg, the fourstroke FS01 fears no competition. Our APS (Advanced Pivot System) suspension, specially refined for big wheels in conjunction with the BWC, provides the perfect balance of comfort, control and efficiency.
Capable
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 (FS01): 2070 gr including all hardware
-Hardware includes: Rear shock, chain guide, bolts, seat clamp, and rear wheel axle.
-Shock dimensions: 200x50mm
2) Bottom bracket – BB90 Shimano pressfit
3) Integrated chainguide and chain catcher – 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
-Replaceable threaded inserts
7) Cable routing
-Continuous cable routing along the down tube
-Internal cable routing for reverb stealth or shock lockout
Reviews
technology
APS
advanced pivot system
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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.
System integration
natural born postmount
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Direct assembly of the brake caliper to the frame with no need for an adapter means improved braking power transfer, especially under demanding conditions.
initial load indicator
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Just set the sag adjustment according to the indicator, and go. Trailside adjustments have never been simpler.
