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The Official Bike Shop of The Lehigh Valley Velodrome ("T-Town")

BMC Fourstroke FS01 29 (XX1)

BMC Fourstroke FS01 29 (XX1)
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BMC’s fourstroke FS01 29 is ultra-fast, ultra-light, and ready to tear up the trail. The carbon frame, stiff through-axles, and APS suspension achieve an impressively lightweight, efficient ride with dialed control. A tapered Fox CTD Factory fork adds to the precision steering while providing 100mm of buttery-smooth, Kashima-coated travel. A Kashima-coated Fox CTD shock complements the APS suspension, creating an active, efficient rear end. SRAM’s XX1 1 x 11-speed drivetrain and XO brakes offer precision shifting and incredible modulation with minimal weight. You’ll experience instant engagement with the DT Swiss hubs, plus the 29-inch hoops are light and fast. BMC rounds out the spec with their short stem, wide carbon bars, carbon seatpost, and a comfortable Fizik saddle.

BMC APS Suspension

BMC's Advanced Pivot System (APS) balances the applied forces of shock absorption and pedaling efficiency to maintain chain tension and rear wheel traction. BMC connected two laterally stiff triangles with a pair of links and an ideally located virtual pivot point (instant balance center noted in graphic). The result is outstanding traction, power transfer, and a ride ready for everything from XC to enduro.

BMC iSC Integrated Skeleton Concept

BMC's iSC (Integrated Skeleton Concept) saves weight by supporting the top tube at the seat tube, increasing stiffness where necessary: in the front triangle of the frame. Using the latest in FEM (Finite Elements Method) computer technology, they can tailor each tube junction for the appropriate distribution of forces.


Frame BMC Carbon w/142 x 12mm thru-axle, 100mm-travel
Fork Fox Float 32 CTD FIT Factory, 100mm-travel w/15mm thru-axle, Kashima coating
Rear Shock Fox Float CTD Factory, w/Kashima coating
Rims/Wheels DT Swiss XR 1501 Spline ONE
Hubs See Rims/Wheels
Spokes See Rims/Wheels
Tires Continental; Front: X-King, Rear: Race King, 29 x 2.20
Crankset SRAM XX1, carbon
Chainrings 30T
Rear Derailleur SRAM XX1 Type 2
Rear Cogs SRAM XX1, 11-speed: 10-42
Shifters Shimano XX1
Handlebars BMC MFB01 carbon
Stem BMC MST02
Brake Levers SRAM XO
Brakes SRAM XO hydraulic disc, 180mm rotors
Saddle Fizik Tundra 2
Seatpost BMC MSP01 carbon

* Subject to change without notice.

Part Numbers

Option MPN
Small 219915
Medium 219916
Large 219917