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2017 BMC Fourstroke 01 XTR Di2 Bike


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2017 BMC Fourstroke 01 XTR Di2 Bike

BMC’s Fourstroke 01 is a full-suspension cross-country bike that you’ll be as happy to take up the mountain as down. At 2040g for the frame, including all the hardware, it’s about as light as you can have a full-suspension bike, and have it still do its job.

The job it is designed for is to carry BMC pro riders to victory in the most demanding cross-country races in the world. And it has succeeded at its mission.

The Fourstroke 01 is the rare 29er full-suspension bike that competes at basically every World Cup event. The bike is light enough to compete with hard tails and the BWC helps position the wheels in such a way that they’re never a liability.

Weight is minimized thanks to generous use of carbon-fiber. Both the frame and the rear end are made of the stuff. As is BMC’s wont, they’ve not only shaped the tubes, but controlled the layup to maximize torsional stiffness and vertical compliance. You see it in how the top and down tubes are flattened, with more material aligned horizontally than vertically. You see it in the 1 1/8” to 1 1/2” tapered head tube. You see it in the BB92 bottom bracket.

BWC, Big Wheel Concept, is the first point of thinking. This is BMC re-thinking geometry to maximize the benefits of 29ers while minimizing any negatives. The result is an agile climber that is as comfortable picking lines while crawling uphill as it is ripping up an open descent. The keys are lower bottom bracket, longer top tube, shorter head tube, and more relaxed head angle.

The BMC Fourstroke 01 is a World Cup-ready full-suspension cross-country bike that not only outperforms hardtails and full-suspension rigs, but takes you into a realm where anything seems rideable.


2017 BMC Fourstroke 01 XTR Di2 Bike


Bottom Bracket Shimano

Brake Calipers Shimano XTR Race

Brake Levers Shimano XTR

Cassette Shimano XTR, 11-40

Chain Shimano XTR

Crankset Shimano XTR Trail, 36/26

Fork Fox Float 32 SC, Factory, FIT4, Kashima, IRD, 100mm

Frame Material 01 Premium Carbon (F&R), DTi

Front Derailleur Shimano XTR Di2 M9050

Handlebar BMC MFB 01 Carbon, 720mm

Headset Integrated

Pedals Not Included

Rear Derailleur Shimano XTR Di2 M9050

Rear Suspension Fox Float DPS, Factory, Evol, Kashima IRD, 100mm

Rotors Shimano RT99, 160mm

Saddle Fizik Tundra M3 Carbon

Seatpost BMC MSP 01 Carbon

Shifters Shimano XTR Di2 M9050

Stem BMC MSM 02

Tires Continental: X-King (F) / RaceKing (R), Performance Silver, 29×2.2

Wheel – Front BMC MWX01 Carbon By DT Swiss

Wheel – Rear BMC MWX01 Carbon By DT Swiss


Size Seat Tube (c-c) Seat Tube (c-t) Top Tube Length Head Tube Length Chain Stay Length Seat Tube Angle Head Tube Angle Stand Over Height Wheel Size Stack Reach
S 420 585 90 445 73.5 70.0 29″ 585 412
M 460 610 100 445 73.5 70.0 29″ 595 434
L 510 635 110 445 73.5 70.0 29″ 605 456





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