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BMC Fourstroke FS01 29 XO: The Ultimate Guide to This Iconic Cross-Country Mountain Bike

If you’re a mountain biking enthusiast searching for a bike that blends speed, agility, and endurance, the BMC Fourstroke FS01 29 XO stands out as a remarkable choice. Released in the early 2010s, this full-suspension 29er has earned its place in the hearts of riders who value lightweight construction and versatile performance. In this comprehensive blog post, we’ll dive deep into everything you need to know about the Fourstroke FS01 29 XO, from its design and specifications to real-world riding experiences and maintenance tips. Whether you’re considering adding one to your collection or just curious about its legacy, read on to discover why this bike continues to impress even years after its debut.

2014 BMC Fourstroke FS01 29 XX1 – Reviews, Comparisons, Specs – Bikes – Vital MTB

Introduction to the BMC Fourstroke FS01 29 XO

The world of cross-country (XC) mountain biking demands bikes that can handle long climbs, technical descents, and everything in between. Enter the Fourstroke FS01 29 XO from Swiss manufacturer BMC, a model that redefined efficiency for its time. Launched around 2013, this bike was part of BMC’s Fourstroke series, designed specifically for endurance racing and trail adventures. With its 29-inch wheels, carbon frame, and high-end components, the Fourstroke FS01 29 XO was built to excel in competitive environments like the World Cup circuits while remaining approachable for recreational riders.

What sets the Fourstroke FS01 29 XO apart is its balance of lightness and capability. Weighing in at approximately 23.8 pounds, it’s not just a race rig—it’s a versatile machine that inspires confidence on varied terrain. Riders have praised its ability to accelerate quickly and maintain speed, making it ideal for those who want a bike that “just wants to go faster.” If you’ve been eyeing a full-suspension 29er that punches above its weight, this model deserves a closer look.

Design and Frame Technology

At the heart of the Fourstroke FS01 29 XO is its premium carbon fiber frame, engineered with BMC’s proprietary shapes to maximize strength while minimizing weight. The frame weighs around 2,040 grams including hardware, showcasing Swiss precision in every tube. BMC’s Advanced Pivot System (APS) suspension design delivers 100mm of travel, providing efficient pedaling without sacrificing traction on rough trails.

The geometry is tailored for big-wheel performance, a concept BMC calls Big Wheel Concept (BWC). This includes a 70-degree head angle, short chainstays (around 445mm), and a low bottom bracket, which together create a nimble yet stable ride. The rear end features a 142x12mm thru-axle for added stiffness, and the Natural Born Postmount brake setup eliminates unnecessary brackets for a cleaner look and better performance.

Visually, the Fourstroke FS01 29 XO sports a sleek black and red color scheme on many models, with clean internal cable routing that enhances its aerodynamic profile. It’s available in sizes small, medium, and large, accommodating a range of rider heights. This design philosophy ensures the bike feels lively and fun, even on non-race days.

BMC Fourstroke FS01 29

Suspension System: Smooth and Efficient

Suspension is where the Fourstroke FS01 29 XO truly shines. Equipped with Fox components front and rear, it offers 100mm of travel that’s tunable for different riding styles. The front fork is typically a Fox 32 Float CTD Adjust FIT Factory with Kashima coating, providing plush damping and easy adjustments via Climb, Trail, and Descend modes.

In the rear, a matching Fox Float CTD shock works in harmony with the APS linkage. This dual-link system minimizes pedal bob during climbs while absorbing bumps effectively on descents. Testers have noted that the suspension feels more capable than typical XC bikes, allowing riders to tackle technical sections with ease. Whether you’re hammering up a fire road or navigating rocky singletrack, the setup provides a responsive feel that encourages pushing limits.

For those upgrading from hardtails, the Fourstroke FS01 29 XO’s suspension bridges the gap, offering full-suspension benefits without the weight penalty often associated with them.

Components and Specifications Breakdown

Let’s break down the key specs of the Fourstroke FS01 29 XO to see what makes it tick:

• Frame: Carbon fiber with APS suspension, 100mm travel, 142x12mm rear axle.
• Fork: Fox 32 Float CTD Adjust FIT Factory Kashima, 100mm travel.
• Shock: Fox Float CTD.
• Drivetrain: SRAM XO 2×10-speed with Type 2 rear derailleur, XO crankset (often 30T single ring in some configs, but typically 2x).
• Brakes: SRAM XO carbon levers with 180mm rotors.
• Wheels: Easton EA90 or similar, tubeless-ready, with Continental or Onza tires (around 2.25″ width, weighing 628-648g each).
• Cockpit: Easton bars, stem, and seatpost for lightweight control.
• Other Features: Optional chainguide mount, post-mount brakes, and a price point around $6,500 at launch.

This spec sheet reads like a wishlist for XC racers. The SRAM XO components provide crisp shifting and reliable stopping power, while the Easton wheels roll smoothly over obstacles. Tires like the Onza Canis offer good grip without excessive rolling resistance, making the bike suitable for both dry and mixed conditions.

In comparisons, variants like the XX1 build shave even more weight (down to 22.3 lbs), but the XO model strikes a great balance between performance and cost.

Products – Page 32 – BMC Switzerland AG

Performance on the Trails: What Riders Say

Real-world testing reveals the Fourstroke FS01 29 XO as a powerhouse. On climbs, the efficient suspension and lightweight build allow for quick accelerations, with testers noting it feels “stiff and more versatile than many other cross-country race bikes.” The 29-inch wheels roll over roots and rocks effortlessly, maintaining momentum where smaller wheels might bog down.

Descending is where it surprises many—despite its XC roots, the bike handles technical terrain confidently. The short stem (around 80mm) and geometry make it nimble, inspiring riders to take lines they might avoid on stiffer hardtails. In endurance events like the TSEpic, it proved its mettle, with riders appreciating the comfort over long distances.

However, it’s not without quirks. Some reviews mention that the component spec might not satisfy hardcore racers seeking the absolute lightest setup, and earlier models had occasional frame issues (though rare). Overall, user feedback highlights its fun factor, with one tester calling it “incredibly fast and capable” for trails beyond racing.

Pros and Cons of the Fourstroke FS01 29 XO

To give you a balanced view, here’s a quick pros and cons list:

Pros:

• Lightweight carbon frame for efficient climbing.
• Versatile suspension that handles both races and trails.
• High-quality components like SRAM XO and Fox suspension.
• Nimble geometry with Big Wheel Concept for better handling.
• Tubeless-ready wheels for easy upgrades.

Cons:

• Higher price point compared to entry-level XC bikes.
• Older model, so parts availability might require searching.
• Limited travel (100mm) may not suit aggressive downhill riding.
• Some users noted potential for chain slap without the Type 2 derailleur tweaks.

This bike excels for riders who prioritize speed and efficiency over all-out aggression.

BMC Fourstroke FS01 29 – first look | BikeRadar

Comparisons with Modern Alternatives

While the Fourstroke FS01 29 XO is a classic, how does it stack up against newer bikes? Compared to the 2019 BMC Fourstroke 01 One, which features 100mm travel but adds an integrated dropper post and slacker geometry (67.5-degree head angle), the older model feels more traditional. The newer version weighs similarly (around 22.9 lbs) but includes modern touches like oversized downtubes.

Against competitors like the Specialized Epic or Trek Top Fuel, the Fourstroke FS01 29 XO holds its own in efficiency but lacks some contemporary features like wireless shifting. If you’re on a budget, used models can be found for under $3,000, making it a smart entry into high-end XC biking.

Maintenance and Upgrades for Longevity

Owning a Fourstroke FS01 29 XO means committing to proper care. Regular suspension servicing (every 50-100 hours) keeps the Fox components performing like new. Check pivots for wear, as the APS system relies on smooth linkages. For upgrades, consider switching to a 1x drivetrain for simplicity or adding a dropper post for better descending control—though the frame isn’t originally designed for one, adapters work.

Tire swaps to something like Maxxis Rekon can enhance grip, and ensuring tubeless setup reduces flats. With a 3-year warranty on the frame (from original purchase), it’s built to last.

Why the Fourstroke FS01 29 XO Still Matters in 2026

Even in 2026, the Fourstroke FS01 29 XO remains relevant for riders seeking a pure XC experience. Its World Cup pedigree—having won championships—proves its enduring design. If you’re into marathon races, trail exploration, or just efficient pedaling, this bike delivers.

In conclusion, the BMC Fourstroke FS01 29 XO is more than a bike; it’s a testament to timeless engineering. Whether racing or leisurely riding, it offers a blend of performance and enjoyment that’s hard to beat. If you’ve ridden one or are thinking about it, share your thoughts in the comments!

BMC Fourstroke FS01 29 XX1-Trailcrew reviews and prices – 29er bikes