Fluid FS A1

The aluminum Fluid FS lineup spans from the entry-level A4 to the premium A1, with each tier prioritizing functional performance over flashy upgrades. The A1 models represent the top of the alloy range, offering high-end suspension like the Fox 34 Factory or RockShox Pike Select+ forks, paired with custom-tuned piggyback shocks. These top builds also feature complete 12-speed drivetrains from Shimano or SRAM and powerful TRP Trail EVO four-piston brakes.

Moving down the ladder, the mid-tier A2 and A3 builds swap in more economical suspension, such as the Marzocchi Bomber Z2 or RockShox 35 Silver forks, alongside Shimano SLX or SRAM SX drivetrains. The entry-level A4 utilizes a RockShox Recon fork and a Shimano Deore 11-speed drivetrain, which still provides a wide gear range for steep climbs.

Across all builds, Norco maintains a commitment to four-piston hydraulic disc brakes and size-specific dropper posts. While the higher-end models offer exceptional value with their sophisticated dampers, reviewers note that the heavier, less supportive forks on the A3 and A4 builds can be a limiting factor for aggressive riders pushing the bike hard on rough descents.

Reviewers consistently praise the Fluid FS for delivering a ride quality that feels distinctly refined for its price bracket. On descents, the bike is stable and composed at speed, utilizing its active suspension to absorb trail chatter. The rear end is frequently highlighted for its grip, with testers noting it "finds traction where other mountain bikes struggle" (BikeRadar) on loose or technical climbs.

While the active suspension design generates massive grip, it does result in noticeable pedal bob on smooth fire roads, prompting many riders to utilize the shock's climb switch during sustained ascents. The bike is also undeniably heavy for a short-travel machine, though reviewers widely agree that it "climbed lighter than its 32-pound weight would suggest" (Vital MTB) thanks to an efficient seated pedaling position.

The most common critique across the board relates to the stock Vittoria tires. Multiple testers found the casing too thin for aggressive riding, noting that the rear tire in particular is "quickly showing signs of wear" (Flow Mountain Bike) and prone to flats. Despite this, the overarching consensus is that the frame and suspension provide a "beautifully hovercrafty" (Singletrackworld) feel that excels across a massive variety of trail conditions.