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BMC: Trailfox 03 X1 - 2017



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Product Description

BMC: Trailfox 03 X1 - 2017

There aren't many bikes in this world that perform as well in the 'fun' category as they do the 'race' category, but the Trailfox is one of those rare exceptions. Originally designed for the Enduro World Series racing circuit for BMC's Factory Trailcrew Team, the Trailfox has quickly become a crowd-pleaser among non-racers. The 150mm pedal-focused 29er makes quick work of climbs and lets riders fully embrace the 'fun' side of the hill. With a long font-center and short chainstays, the progressive Big Wheel Concept geometry makes for an awesome day on rugged terrain.

  • Al-13 Premium Triple-butted aluminum (F&R)
  • Rock Shox Pike RC, Solo Air
  • RaceFace Aeffect / SRAM X1
  • Shimano SLX
  • DT Swiss / SRAM



Trailfox 03 29 - Advanced Pivot System




Al-13 Premium Triple-butted aluminum (F&R)




S / M / L




RockShox Pike RC Solo Air (160mm)



Rear Shock

Cane Creek DB Inline (150mm)








RaceFace Aeffect SL DM, 30T




SRAM PG1150, 10-42T




KMC X-11-1 EPT



Front Derailleur




Rear Derailleur









Shimano SLX (203/203mm)




BMC MFB 02, 780mm




BMC AMSM 02, 45mm




HDK Dropper Stealth, 125mm




Fizik Nisene XS








DT Swiss E512




Onza: Ibex AM FR 120 (F) / AM 60 (R), 2.4








USD 3,999



APS – Advanced Pivot System

A well-designed full suspension bike offers the control and confidence to ride a trail without hesitation. Ideal suspension systems maximize pedaling efficiency without compromising the ability to soak up the bumps. BMC's solution is the Advanced Pivot System (APS) which optimizes kinematics and pivot placements, leverage ratios, axle paths and shock dimensions. Iterative calculations fine-tune all the suspension properties of each of our distinctive full-suspension models to achieve the best ride characteristics for any terrain. The result is a light, stiff and compact structure that promotes excellent control and energy transfer for the rider.

When accelerating, an inertial force is generated which attempts to compress the shock system. BMC's APS solution counteracts this effect. It carefully calculates the pivot points of the rear suspension so that inertial force generated under acceleration is not misdirected into compressing the shock, instead, the chain tension compensates for this effect. As a result, all the pedal power is used for propulsion without any loss of energy through the suspension. The shock system ensures optimum traction, and therefore ensures that power is transferred to the ground.

BMC's solution to finding the optimal pivot placement, APS achieves this through iterative calculations in order to fine-tune such suspension characteristics as leverage ratio, axle path, and the amount of kickback. The unified rear triangle is linked to the main frame by two short links, with the upper link actuating the shock. The result is a light, stiff and compact structure. Impacts are absorbed by the shock system, providing excellent comfort for the rider. Another example of BMC's forward-thinking cycling solutions from the Impec R&D Lab and the efforts we go to put the rider in the middle of the equation, the advanced pivot system offers the rider the perfect combination of efficiency, traction, and comfort.
  • Traction - To achieve just the right amount of travel for each of BMC's distinct models they optimized the leverage ratio, ensuring the optimal balance between progression and small bump sensitivity.
  • Control - Low suspension ratio means greater oil flow and energy dissipation. Pick your line and let the bike do the rest. 
  • EfficiencyThere is a lot to be said for keeping the rubber side down. With less time in the air you cover ground faster. 

BWC – Big Wheel Concept 

Winning performances are much more than just a tire size – it’s how wheels are integrated into a complete bike. BMC's Big Wheel Concept maximizes the rolling benefits of 29” wheel sizes and maintains a playful and nimble feel through purposeful geometry and cockpit tweaks. Low bottom bracket and short chainstays promote excellent traction and control while a roomy toptube and short stem promote a confident rider position. BWC focuses on the elements that transfer the benefits of big wheels onto the trails. 

  • Greater agility - Cornering becomes instinctive, not just a reaction – as you lean in the bike moves with you.
  • Increased stability - Both wheels on the ground – letting you take more risks and of course, go faster. 

BWC Geometry

The aggressive demands of all-mountain riding demand a maneuverable machine, with a confidence-inspiring feel when screaming down high-speed descents. A long top tube, slack head tube angle and a wide bar paired with short stem and chainstays is our recipe for making big wheels roll fast and turn easily. The entire Trailfox family is built upon this super progressive approach to all-mountain geometry - enduro-ready from the first ride.


BMC believes that off-road bikes are deserving of the classic ‘showpiece’ designation that bike lovers admire. Their engineers worked magic by making the Trailfox one of the most adaptable frame platforms thanks to an integrated chain guide and full internal cable management for up to 6 cables. Another BMC trail bike for those who appreciate attention to aesthetic detail.


BMC's Advanced Pivot System (APS) for the Trailox family is focused on pedaling efficiency and elevated bike control. Wait, an all-mountain bike that pedals well? Yep, that’s right! BMC Factory Trailcrew riders wanted to be able to pedal efficiently so they can stay fresh between trail-tearing sessions. For riders who pedal up the climbs so they can bomb back down them this rig is the answer.


  • Frame: Trailfox 03 Al-13 Premium Aluminum Frame (F&R) - 150mm
  • Frame Technology: Advanced Pivot System Suspension & Big Wheel Concept Geometry
  • 3 sizes: S / M / L
  • Frame Weight: 3300 (M)** 


  • Frame: Integrated ISCG05 mounts / Internal routing for dropper post / Initial Load Indicator (SAG) / Injection molded chain stay protectors

Technical details

  • Fork: Tapered steerer 1-1/8” to 1-1/2”, 51mm offset
  • Seatpost: 31.6mm
  • Bottom Bracket: PF92 
  • Brakes: Natural-born postmount 180 / 203***
  • Drivetrain: Bottom pull front derailleur - High-direct type mount / Replaceable standard or direct mount rear derailleur hangers
  • Tires: 2.4” maximum width****
  • Misc.: 200mm x 57mm shock dimensions  / 21.84mm x 8mm hardware / 36T maximum chainring / single ring drivetrain

**Average sample weight with hardware

***Rotor sizes adapted for some frame sizes

****Tire dimensions based on measured tire width




 *Detail images to display frame details only, not color.

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