Merida Big.Nine 400 (2025) - Text Review

At the core of the Big.Nine 400 lies Merida’s lighter, stiffer, and more responsive TFS III aluminum hardtail frame, engineered for fast XC performance. The updated geometry features a longer reach, slacker head angle, and balanced riding stance offering stability downhill and razor-sharp control uphill. The internal cable routing delivers a clean, race-ready aesthetic, while the smooth welding and detailed finishing reflect Merida’s premium craftsmanship.

The Merida Big.Nine 400 runs a precise and trail-efficient Shimano Deore 1x11 drivetrain, built for clean shifts and minimal maintenance. The single-chainring setup simplifies gear selection while offering a wide enough range for demanding climbs and fast, flowy descents.

Shifts feel crisp and fast, even under load, allowing you to maintain rhythm on technical terrain. The drivetrain's responsiveness makes it excellent for riders transitioning from recreational cycling to fast XC riding.

Comfort on the Big.Nine 400 comes from a smart blend of frame tuning and ride-smoothing components. The air-suspension fork offers better adjustability and responsiveness compared to coil forks, absorbing bumps, roots, and rocky sections with ease. Paired with the compliant alloy seatpost and optimized tube shaping, the bike reduces fatigue on long rides.

Its XC-focused geometry offers a slightly aggressive posture for speed, yet retains enough comfort for endurance sessions or long weekend rides.

Braking duties are handled by Shimano hydraulic disc brakes, delivering sharp power and consistent modulation across wet and dry terrain. Whether you're controlling your speed on steep descents or navigating tight corners, the braking response feels predictable and confidence-boosting.

The wide handlebar and short stem enhance stability and precision, giving you full command of the bike during technical rides. Combined with the air-sprung fork, the bike inspires trust when descending or attacking rough sections.

Equipped with 29” fast-rolling wheels, the Big.Nine 400 glides over obstacles, maintains speed on open tracks, and offers superior stability on rough ground. The double-wall alloy rims add durability, while the XC-tread tires strike the right balance between rolling efficiency and off-road traction.

The Merida comfort-tuned saddle provides support across long training sessions, ensuring you stay focused on performance, not discomfort.