BMC Fourstroke 01 XTR DI2: The Ultimate Guide to This High-Performance Cross-Country Mountain Bike

If you’re a passionate mountain biker looking for a machine that combines cutting-edge technology with race-ready performance, the BMC Fourstroke 01 XTR DI2 stands out as a remarkable option. This full-suspension cross-country bike from the Swiss brand BMC has earned its reputation among enthusiasts and professionals alike for its blend of lightweight construction, precise handling, and electronic shifting prowess. In this comprehensive blog post, we’ll dive deep into everything you need to know about the Fourstroke 01 XTR DI2, from its detailed specifications to real-world riding experiences, helping you decide if it’s the right fit for your trails.

Whether you’re tackling steep climbs, navigating technical descents, or competing in XC races, the Fourstroke 01 XTR DI2 offers a level of efficiency and control that’s hard to beat. Let’s explore what makes this bike a standout in the crowded world of mountain biking.

BMC Fourstroke 01 Mountain Bike – 2017, Medium

A Brief History of the BMC Fourstroke Series

BMC, short for Bicycle Manufacturing Company, has been innovating in the cycling world since 1994. The Fourstroke line, introduced as a full-suspension platform, quickly became synonymous with cross-country excellence. The Fourstroke 01 model, in particular, represents the pinnacle of BMC’s engineering, with the XTR DI2 variant incorporating Shimano’s top-tier electronic shifting system.

Launched around 2015-2017, the Fourstroke 01 XTR DI2 was designed for riders who demand the best in terms of speed and reliability. It builds on BMC’s Advanced Pivot System (APS) suspension, which provides 100mm of travel both front and rear, optimized for efficiency without sacrificing comfort on rough terrain. Over the years, the Fourstroke series has evolved, but the 01 XTR DI2 remains a benchmark for those seeking a blend of traditional XC agility with modern electronic features.

In recent updates, BMC has continued to refine the Fourstroke lineup, with models like the 2026 Fourstroke R 01 ONE incorporating similar high-end components but with advancements in frame design and drivetrain options. However, the original Fourstroke 01 XTR DI2 holds a special place for its pioneering use of Di2 technology in mountain biking.

Key Features of the Fourstroke 01 XTR DI2

What sets the Fourstroke 01 XTR DI2 apart is its meticulous attention to detail in every component. Let’s break down the standout features that make this bike a joy to ride.

Frame and Suspension Design

The heart of the Fourstroke 01 XTR DI2 is its premium carbon fiber frame, engineered for stiffness and low weight. Weighing in at around 24-25 pounds depending on the build, it’s light enough for quick accelerations yet robust for demanding trails. The frame uses BMC’s 01 Premium Carbon technology, with internal cable routing for a clean look and improved aerodynamics.

The APS dual-link suspension system delivers 100mm of travel, balanced between the front fork and rear shock. This setup ensures excellent pedaling efficiency, minimizing energy loss during climbs while providing ample absorption for descents. Paired with a RockShox or Fox fork (model-specific), the suspension can be locked out remotely for those flat-out sprints.

Geometry-wise, the Fourstroke 01 XTR DI2 features a 66.5-degree head tube angle for confident descending, a 76.7-degree seat tube angle for optimal climbing position, and a wheelbase of about 1188mm for stability. These measurements make it versatile for both racing and recreational riding.

2023 BMC Fourstroke 01 ONE – Specs, Comparisons, Reviews – 99 Spokes

Drivetrain: Shimano XTR Di2 Electronic Shifting

One of the crown jewels of the Fourstroke 01 XTR DI2 is its Shimano XTR Di2 2×11 drivetrain. Di2 stands for Digital Integrated Intelligence, offering electronic shifting that’s lightning-fast and incredibly precise. Unlike mechanical systems, Di2 eliminates cable stretch and provides consistent performance in all conditions – mud, dust, or rain.

The setup includes a Shimano XTR FC-M9020 crankset with 36-26T chainrings, paired with an 11-40T cassette for a wide gear range. This allows riders to tackle steep inclines without grinding and maintain speed on flats. The electronic shifters are programmable, letting you customize shift speeds and even sync with other components for seamless operation.

For those upgrading from mechanical groupsets, the Di2 system feels almost telepathic – shifts happen with a simple button press, reducing fatigue on long rides.

Brakes and Wheels

Stopping power comes from Shimano XTR hydraulic disc brakes, with 160mm rotors front and rear for modulated control. These brakes are renowned for their reliability and heat dissipation, ensuring you can bomb down descents without fade.

The bike rolls on 29-inch wheels, typically DT Swiss or similar high-end hubs laced to lightweight rims. Tires like Maxxis or Vittoria Mezcal in 2.25-2.35 inches provide excellent traction and low rolling resistance, perfect for XC terrain.

Additional Components

• Handlebar and Stem: BMC’s own integrated cockpit for precise steering.
• Seatpost: Often a dropper post in later variants, but standard models feature a rigid post for weight savings.
• Saddle: Fi’zi:k or similar ergonomic options for comfort during extended sessions.

Overall, the Fourstroke 01 XTR DI2 is built with components that prioritize performance, making it ideal for competitive riders.

Performance on the Trail: How the Fourstroke 01 XTR DI2 Rides

Riding the Fourstroke 01 XTR DI2 is an experience that blends speed with composure. On climbs, the efficient suspension and steep seat angle allow you to power up without wasting energy. The electronic shifting shines here, letting you flick through gears effortlessly while maintaining cadence.

Descending is where the bike’s balanced geometry comes into play. The 100mm travel soaks up roots and rocks, while the slack head angle provides stability at speed. Reviewers note its razor-sharp handling, making it feel like an extension of your body on technical singletracks.

In races, the Fourstroke 01 XTR DI2 excels due to its low weight and quick acceleration. It’s not just for pros – recreational riders appreciate its versatility for all-day epics. However, if you’re into more aggressive trail riding, consider the longer-travel Fourstroke LT variant.

BMC Fourstroke 01 TWO first ride review | BikeRadar

Pros and Cons of the Fourstroke 01 XTR DI2

To give you a balanced view, here’s a quick rundown:

Pros

• Exceptional electronic shifting for precise, reliable performance.
• Lightweight carbon frame with efficient suspension.
• Versatile geometry for XC racing and trail riding.
• High-quality components from Shimano and BMC.
• Proven track record in competitions.

Cons

• Higher price point, around $8,000-$10,000 when new (used models are more affordable).
• 100mm travel might feel limited on very rough terrain.
• Electronic system requires battery charging and occasional maintenance.
• Older model, so parts like Di2 might be harder to source in 2026.

Comparisons: Fourstroke 01 XTR DI2 vs. Modern Alternatives

How does the Fourstroke 01 XTR DI2 stack up against newer bikes? Let’s compare it to a few contemporaries.

The 2026 Fourstroke R 01 ONE offers more travel and updated electronics, making it a natural evolution. If budget is a concern, the Specialized Epic provides similar performance at a lower cost.

For e-bike fans, the Fourstroke AMP LT integrates electric assist while maintaining a lightweight profile.

BMC Fourstroke 01 Mountain Bike – 2017, Medium | The Pro’s Closet – The Pro’s Closet

Buying Guide: Where to Get the Fourstroke 01 XTR DI2 in 2026

As an older model, the Fourstroke 01 XTR DI2 is primarily available on the used market through sites like The Pro’s Closet or local bike shops. Expect to pay $3,000-$5,000 for a well-maintained unit. Check for frame integrity, battery health in the Di2 system, and suspension service history.

If you’re eyeing a new BMC, head to their official website or authorized dealers for the latest Fourstroke variants. Always test ride to ensure the fit, and consider custom builds if needed.

Maintenance Tips for Longevity

To keep your Fourstroke 01 XTR DI2 in top shape:

• Charge the Di2 battery regularly and update firmware via Shimano’s E-Tube app.
• Service the suspension every 50-100 hours of riding.
• Clean the drivetrain after muddy rides to prevent wear.
• Inspect carbon components for cracks annually.

With proper care, this bike can deliver years of thrilling rides.

Final Thoughts on the Fourstroke 01 XTR DI2

The BMC Fourstroke 01 XTR DI2 remains a testament to innovative mountain bike design, offering a perfect mix of speed, technology, and durability. Whether you’re a seasoned racer or a weekend warrior, its features continue to impress even in 2026. If electronic shifting and XC efficiency are your priorities, this bike won’t disappoint.

Ready to hit the trails? Share your experiences with the Fourstroke 01 XTR DI2 in the comments below!

01 Xtr Di2 Bmc Fourstroke 01 2017 Bmc Fourstroke Sram Gx 2017 2017 BMC Fourstroke 01 –