Description

Discovering the Fourstroke FS01 XX: A Comprehensive Guide to This Iconic Mountain Bike

If you’re on the hunt for a high-performance cross-country mountain bike that blends Swiss engineering precision with trail-conquering capabilities, the Fourstroke FS01 XX deserves your attention. This model from BMC has carved out a reputation among enthusiasts for its balance of speed, efficiency, and fun on technical terrain. In this in-depth blog post, we’ll explore everything you need to know about the Fourstroke FS01 XX, from its design features to real-world performance, helping you decide if it’s the right ride for your adventures.

The Origins and Evolution of the Fourstroke Series

BMC, a Swiss brand renowned for its innovative bicycle designs, introduced the Fourstroke line as a flagship for cross-country (XC) racing and trail riding. The Fourstroke FS01 XX, specifically the 2013 model, represents a pinnacle in that era’s full-suspension 29er technology. Drawing from BMC’s racing heritage, this bike was engineered to excel in demanding World Cup-level competitions while remaining accessible for everyday riders.

The “FS” in FS01 stands for Full Suspension, highlighting its dual-shock setup that provides 100mm of travel both front and rear. The “XX” designation often points to a high-end build kit, featuring components like SRAM XX groupset for precise shifting and braking. Over the years, the Fourstroke series has evolved, with newer iterations like the 2020 and 2024 models building on this foundation, but the FS01 XX remains a benchmark for its time due to its lightweight carbon frame and efficient pedaling platform.

What sets the Fourstroke FS01 XX apart is its APS (Advanced Pivot System) suspension, which minimizes pedal bob and maximizes traction. This technology ensures that energy from your pedaling goes straight to propulsion rather than being wasted on unnecessary movement. Riders who have tested it praise its ability to handle steep climbs and rocky descents with equal poise, making it a versatile choice for varied terrains.

Design and Build Quality: What Makes the Fourstroke FS01 XX Stand Out

At the heart of the Fourstroke FS01 XX is its carbon fiber frame, meticulously shaped to optimize strength-to-weight ratio. BMC utilizes proprietary tube shapes to enhance stiffness in key areas like the bottom bracket and head tube, ensuring responsive handling without excess flex. The frame weighs in at around 2.2kg for a medium size, contributing to the bike’s overall light build—typically under 11kg fully assembled.

The geometry strikes a balance between XC race bikes and trail-oriented machines. With a 69.5-degree head angle and a 73.5-degree seat angle, it offers stability on descents while maintaining an aggressive climbing position. The 29-inch wheels roll over obstacles smoothly, and the integrated cable routing keeps the aesthetics clean and protects internals from mud and debris.

Key components include:

• Fork: Fox Float CTD or similar, with 100mm travel and adjustable damping for fine-tuning on the fly.
• Shock: DT Swiss or Fox rear shock, integrated with the APS system for seamless performance.
• Drivetrain: SRAM XX 2×10 or XX1 setups, known for crisp shifts and wide gear ranges suitable for steep inclines.
• Brakes: SRAM XX hydraulic discs, providing powerful stopping power with modulation for control on slippery trails.
• Wheels: Often DT Swiss XR 1501 or equivalent, tubeless-ready for reduced weight and puncture resistance.

This build not only prioritizes performance but also durability, with sealed bearings and high-quality finishes that withstand harsh conditions. If you’re upgrading from a hardtail, the Fourstroke FS01 XX’s suspension will feel like a revelation, absorbing bumps while keeping you connected to the trail.

Performance on the Trail: Real-World Testing and Reviews

When it comes to actual riding, the Fourstroke FS01 XX shines in cross-country scenarios. Reviewers from BikeRadar describe it as offering “Swiss maximum speed efficiency with infectious surefooted confidence,” making technical trails enjoyable rather than intimidating. The bike’s suspension kinematics allow for efficient climbing, where it feels almost like a hardtail, yet it transforms into a plush descender when needed.

In endurance events like the Trans-Sylvania Epic, riders noted that the Fourstroke FS01 XX encourages longer rides because it’s fun and forgiving. The 29er wheels provide momentum that carries through rough sections, and the low standover height aids in maneuverability. On singletracks, it corners eagerly, with geometry that’s neither too slack for racing nor too steep for playfulness.

Australian Mountain Bike Magazine testers highlighted the stiff bar and stem combo, which excels in tight corners, and the overall build that handles high-speed descents with composure. However, some users mention that the stock tires might need upgrading for wet conditions, as they can slip on loose gravel.

For those into racing, the Fourstroke FS01 XX has proven its mettle on World Cup circuits, where its lightweight design and efficient power transfer give riders an edge. Casual trail riders appreciate how it blends race-ready speed with all-day comfort, reducing fatigue on long outings.

Detailed Specifications of the Fourstroke FS01 XX

To give you a clear overview, here’s a breakdown of the key specs for the 2013 BMC Fourstroke FS01 29 XX model:

These specs make the Fourstroke FS01 XX a competitive option even today, though newer models have adopted 12-speed drivetrains and dropper posts for added versatility.

Pros and Cons: Is the Fourstroke FS01 XX Right for You?

Like any bike, the Fourstroke FS01 XX has its strengths and areas for improvement. Here’s a balanced look:

Pros:

• Exceptional climbing efficiency thanks to the APS suspension.
• Lightweight carbon construction for agile handling.
• Versatile for both racing and trail riding.
• High-quality components that hold up over time.
• Smooth rollover from 29-inch wheels.

Cons:

• Older models lack modern features like dropper posts (though retrofittable).
• Can feel stiff on very rough terrain compared to longer-travel bikes.
• Premium price point, even on the used market.
• Limited availability as it’s a discontinued model.

If you’re a XC racer or someone who values speed over plushness, this bike is ideal. For more aggressive trail riding, consider newer Fourstroke variants or alternatives like the Scott Spark.

Comparisons with Similar Bikes

How does the Fourstroke FS01 XX stack up against contemporaries? Compared to the Trek Superfly FS, the BMC offers better suspension tuning for efficiency, though the Trek might edge it in affordability. Against the Specialized Epic, the Fourstroke FS01 XX provides more playful geometry, making it funner on descents.

Newer bikes like the 2024 BMC Fourstroke 01 LTD introduce updates such as integrated dropper actuation and lighter frames, but at a higher cost—around $10,000+. If budget is a concern, look for used FS01 XX models on platforms like eBay, where they often sell for $2,000-$4,000 in good condition.

Maintenance Tips and Upgrades for Longevity

Owning a Fourstroke FS01 XX means investing in maintenance to keep it performing at its best. Regularly service the suspension pivots and shocks—BMC recommends annual checks. Upgrade to tubeless tires for better traction and fewer flats. If you’re adding a dropper post, ensure compatibility with the 31.6mm seat tube.

For customization, swapping to a 1x drivetrain can simplify shifting, and carbon wheels can shave grams for racing. Always use genuine BMC parts for the best fit.

Final Thoughts on the Fourstroke FS01 XX

The Fourstroke FS01 XX embodies what makes BMC bikes special: precision engineering meets real-world usability. Whether you’re tackling XC races, epic trails, or weekend adventures, this bike delivers efficiency and excitement in spades. While newer models have advanced the line, the FS01 XX’s legacy endures as a reliable, high-performing machine.

If you’re ready to experience it, check local dealers or online marketplaces. Ride safe, and may your trails be thrilling!