Description

Discover the BMC Fourstroke FS01 XTR: The Ultimate Cross-Country Mountain Bike for Enthusiasts

If you’re a mountain biking aficionado searching for a bike that combines cutting-edge engineering with race-proven performance, the BMC Fourstroke FS01 XTR stands out as a remarkable choice. This full-suspension 29er has earned its reputation among riders who demand efficiency on climbs and confidence on descents. In this comprehensive guide, we’ll dive deep into what makes this bike a timeless option, even years after its initial release. Whether you’re considering it for cross-country racing, marathon events, or spirited trail rides, we’ll cover everything from its design features to real-world performance.

A Brief History of the BMC Fourstroke Series

BMC, the Swiss bicycle manufacturer known for precision and innovation, introduced the Fourstroke line to cater to serious cross-country and marathon riders. The Fourstroke FS01 model, particularly when equipped with Shimano’s top-tier XTR components, represents the pinnacle of their engineering during the early 2010s. Launched around 2013, this bike was designed to dominate demanding terrains while keeping weight low and responsiveness high. It quickly gained acclaim for blending the agility of a hardtail with the comfort of full suspension, making it a favorite for events like the Trans-Sylvania Epic.

The Fourstroke FS01 XTR variant, with its full carbon frame and premium parts, was positioned as a high-end offering. Priced at around $8,500 at launch, it targeted competitive riders who valued every gram saved and every watt efficiently transferred to the trail. Even today, in 2026, this model holds appeal for those seeking a classic bike that performs exceptionally well without the latest bells and whistles.

Frame Design and Construction: Lightweight Yet Robust

At the heart of the Fourstroke FS01 XTR is its full carbon frame, weighing in at just 2,040 grams including the rear shock and all associated hardware. This impressive lightness doesn’t come at the expense of durability—BMC’s engineering ensures the frame can handle the rigors of cross-country racing. The design features a short head tube for a low front end, promoting an aggressive riding position that’s ideal for efficient pedaling and quick handling.

The frame incorporates a 12x142mm rear thru-axle for stiffness and precise wheel alignment, along with integrated cable routing that keeps things clean and aerodynamic. Replaceable post-mount brake bosses add to its practicality, allowing for easy maintenance. For those looking to customize, the frame includes mounts for an integrated chainguide and even routing for a RockShox Reverb Stealth dropper post, hinting at its versatility beyond pure XC racing.

One standout aspect is the APS (Advanced Pivot System) suspension layout. This rocker-link driven system, with a lower link positioned above the bottom bracket, provides 100mm of travel that’s both efficient and plush. It’s tuned to minimize pedal bob while maintaining traction on rough sections, making it feel like a much more capable bike than its travel numbers suggest.

2014 BMC Fourstroke FS01 29 XTR – Reviews, Comparisons, Specs …

Suspension System: Efficiency Meets Comfort

The suspension on the Fourstroke FS01 XTR is a highlight, featuring a 100mm Fox 32 Float CTD fork up front and a matching Fox CTD rear shock. The CTD (Climb/Trail/Descend) technology allows riders to quickly adjust damping settings on the fly, optimizing for different trail conditions. In Climb mode, it firms up for efficient ascents; Trail mode offers a balanced feel for mixed terrain; and Descend opens it up for maximum control on drops and rocky descents.

Riders have praised how the rear suspension remains active even in Trail mode, muting impacts while keeping the wheel glued to the ground. This setup excels in technical sections, where the bike’s 40mm bottom bracket drop encourages pedaling through choppy terrain without hang-ups. The big 29-inch wheels further enhance this, rolling over obstacles with ease and maintaining momentum.

For geometry, a large frame boasts a 70-degree head angle, 635mm effective top tube, and 445mm chainstays, creating a stable yet nimble platform. The low bottom bracket (with that 40mm drop) plants the bike firmly, boosting confidence on climbs and descents alike. It’s not the slackest bike out there, but for its era and intended use, it strikes an excellent balance.

Premium Components: Shimano XTR and Beyond

What sets the Fourstroke FS01 XTR apart is its spec sheet, headlined by Shimano’s XTR groupset. This includes a 3×10 drivetrain (though some builds featured 2×10 options) with crisp shifting and a wide range for tackling steep inclines. The XTR brakes, paired with 180mm IceTech rotors front and rear, provide powerful, fade-resistant stopping power—essential for high-speed descents.

Wheels are typically Easton EA90, which are UST-compatible and tubeless-ready, offering a lightweight and durable setup. Tires like Continental Race King or X-King (2.2-inch) provide excellent grip and low rolling resistance. The cockpit features components like EC70 bars and seatpost for added stiffness without weight penalties.

In reviews, the drivetrain and brakes are described as “hard to fault,” delivering reliable performance across varied conditions. Overall bike weight hovers around 11.3kg (24.9lb), making it competitive even by modern standards.

BMC Four Stroke FS01 2014 With Shimano XTR

On-Trail Performance: From Climbs to Descents

In real-world testing, the Fourstroke FS01 XTR shines as a versatile performer. During grueling events like the Trans-Sylvania Epic, it handled long climbs with minimal energy loss, thanks to its efficient suspension and lightweight build. Riders noted how it pedals well even with the shock fully open, avoiding the need for constant lockout adjustments.

On descents, the bike surprises with its composure. Despite flat bars and XC-oriented geometry, it tackles rough, rock-strewn trails at speed, leading to strong Enduro segment results. The front end stays planted, and the big wheels prevent snags, allowing for aggressive riding without feeling punishing.

Comfort is another strong suit—after hours in the saddle, the suspension remains supple, and the aggressive position doesn’t fatigue as quickly as expected. However, one minor drawback is slight brake jack during hard stops on fast gravel descents, though it’s not a deal-breaker.

Overall, this bike encourages riders to push limits, making rides longer and more enjoyable. It’s not just for racing; with minor tweaks like a dropper post, it could excel in trail riding too.

Pros and Cons of the Fourstroke FS01 XTR

Pros:

• Exceptional climbing efficiency with minimal pedal bob.
• Supple suspension that handles technical terrain beyond its XC roots.
• Lightweight carbon frame and premium components for a race-ready feel.
• Versatile geometry that balances stability and agility.
• Reliable Shimano XTR shifting and braking.

Cons:

• Higher price point, though justified by quality.
• Minor brake jack in extreme stopping scenarios.
• Older model, so availability might be limited to used markets.
• Not as slack as modern trail bikes for aggressive enduro use.

BMC Fourstroke FS01 29

How Does It Compare to Modern Alternatives?

While the Fourstroke FS01 XTR is from a previous generation, it holds up well against today’s bikes. Compared to the current BMC Fourstroke 01 series, the older model has slightly less travel (100mm vs. up to 120mm in some new variants) but similar efficiency. Modern bikes might feature 1×12 drivetrains and dropper posts stock, but the XTR’s 3×10 still offers ample gearing for most riders.

Against competitors like the Specialized Epic or Trek Top Fuel from the same era, the BMC stands out for its Swiss precision and lighter frame weight. If you’re on a budget, look for used Fourstroke FS01 XTR models— they often sell for a fraction of the original price while delivering enduring performance.

Buying Guide: Where to Find and What to Look For

In 2026, new Fourstroke FS01 XTR bikes are rare, but the used market is vibrant on platforms like eBay or cycling forums. Expect to pay $2,000-$4,000 for a well-maintained example, depending on condition. Check for frame cracks, suspension service history, and component wear.

Sizes range from small to extra-large, with geometry tailored for aggressive XC riding. Test ride if possible to ensure the fit— the short head tube and low BB might feel racy for casual riders.

Upgrades could include tubeless tires, a dropper post, or even electronic shifting if you’re modernizing it. Always consult a professional mechanic for setup.

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Conclusion: Why the Fourstroke FS01 XTR Still Matters

The BMC Fourstroke FS01 XTR remains a benchmark for what a cross-country full-suspension bike can achieve. Its blend of lightweight construction, efficient suspension, and premium components makes it a joy for racing or trail exploration. If you’re drawn to classic designs that prioritize performance over trends, this bike deserves a spot in your garage. With proper care, it can provide years of thrilling rides, proving that great engineering is timeless.