ZFS-5 GX Eagle

The Cervelo ZFS-5 marks the brand's entry into full-suspension mountain biking, arriving as a dedicated cross-country race platform built for modern, technical courses. Rather than splitting its lineup into entirely separate chassis designs, Cervelo uses a single lightweight carbon frame to offer two distinct travel configurations. By swapping the shock stroke, the ZFS-5 can be set up as a hyper-focused 100mm race bike or a more versatile 120mm machine. Both setups rely on a linkage-driven single-pivot layout with flex stays, prioritizing pedaling efficiency and low weight while reducing maintenance complexity. The result is a progressive platform that caters to World Cup competitors and marathon riders alike, blending Cervelo's composite expertise with contemporary mountain bike standards.

$5,000SRAM GX Eagle

Build

Size

Stack	601mm
Reach	469mm
Top tube	617.3mm
Headtube length	114mm
Standover height	744mm

Fit and geometry

The ZFS-5 utilizes modern cross-country geometry that shifts depending on the chosen travel configuration. In the 100mm setup, the head tube sits at a relatively slack 67.8 degrees, paired with a steep seat tube angle that keeps the rider in an aggressive, forward-leaning posture for efficient power transfer. Swapping to the 120mm fork kicks the head angle back to 66.6 degrees and slightly reduces the reach, creating a more upright and stable position suited for steep descents and long days in the saddle.

To maintain consistent handling across the size run, Cervelo employs size-specific chainstays that grow from 432mm on the Small to 440mm on the Extra Large. This scaled rear center ensures that taller riders experience the same balanced weight distribution as shorter riders. A generous bottom bracket drop further anchors the fit, keeping the rider's center of gravity low to enhance cornering stability without feeling overly stretched out.

Full specs

Frameset

Fork

Rockshox SID SL Select, DebonAir spring, Charger RL damper, tapered steerer, 15x110mm, Maxle Stealth, 44mm offset, 100mm

Rear shock

Rockshox SIDLuxe Select+, RL 3 position remote damper, 190 x 40mm

Groupset

Shift levers

SRAM GX Eagle, 12 speed

Rear derailleur

SRAM GX Eagle, 12 speed

Cassette

SRAM GX Eagle, 10-52, 12 Speed

Chain

SRAM GX Eagle, 12 speed

Crankset

SRAM GX Eagle, 32T, Boost 148 DUB

Bottom bracket

SRAM DUB, BSA 73mm

Front brake

SRAM Level Bronze 4 Piston

Rear brake

SRAM Level Bronze 4 Piston

Front rotor

SRAM Centerline 6-Bolt

Rear rotor

SRAM Centerline 6-Bolt

Wheelset

Front wheel

Race Face ARC Offset 27, 27mm IW, DT Swiss 370, 15x110mm, 24H, 6 bolt, tubeless compatible

Rear wheel

Race Face ARC Offset 27, 27mm IW, DT Swiss 370, 12x148mm, XD freehub, 28H, 6 bolt, tubeless compatible

Front tire

Maxxis Rekon Race, EXO 120TPI, 29x2.4

Rear tire

Maxxis Rekon Race, EXO 120TPI, 29x2.4

Cockpit

Stem

Race Face Aeffect Alloy, 35mm clamp, 6 degree

Handlebars

Race Face Turbine Alloy, 35mm clamp, 760mm width, 10mm rise

Saddle

Cervélo Saddle

Seatpost

Race Face Ride XC Alloy 30.9

Builds

The ZFS-5 lineup spans four primary build tiers, all utilizing the exact same premium carbon frame. The range opens with the GX Eagle model, which pairs a mechanical SRAM drivetrain with alloy Race Face wheels and RockShox Select suspension. Moving up the ladder introduces wireless shifting with the GX AXS build, while the XTR and XX SL AXS models upgrade to lighter Reserve 28 XC carbon wheels and top-tier suspension dampers.

A critical distinction in the spec sheet lies between the 100mm and 120mm configurations. The 100mm builds are strictly race-focused, featuring rigid carbon or alloy seatposts, narrower handlebars, and remote suspension lockouts. Conversely, the 120mm models are equipped for technical terrain, coming standard with dropper posts, wider bars, and slightly beefier forks like the Fox 34 Step-Cast or RockShox SID with 35mm stanchions. Across all builds, Cervelo includes practical standards like a threaded BSA bottom bracket, SRAM UDH compatibility, and clearance for 2.4-inch tires, ensuring the chassis remains easy to service and upgrade over time.

GX Eagle

$5,000

SRAM GX EagleSelected

GX AXS

$6,250

SRAM GX Eagle AXS

XTR

$8,700

Shimano XTR

XX SL AXS

$10,700

SRAM XX SL Eagle AXS

Reviews

Reviewers consistently praise the ZFS-5 for its exceptional climbing efficiency and capable descending manners, particularly in the longer-travel configuration. The lightweight frame translates directly into a "brutal forward thrust" (Bike-test) on steep gradients, while the flex-stay suspension remains active enough to maintain traction over loose, technical climbs. Testers noted that the chassis feels sprightly without being overly harsh, allowing the bike to "suck up chatter like an off-road vacuum cleaner" (Flow Mountain Bike).

On descents, the bike defies the nervous handling often associated with pure race rigs. The geometry encourages a centered riding position, giving testers the sensation that they were sitting "in the bike and not on the bike" (GearJunkie). The 120mm version, in particular, offers high-speed stability and composure over rough terrain.

However, the platform is not without its compromises. The 100mm race builds feature a highly progressive rear suspension tune that some found difficult to push through its full travel, occasionally creating a mismatched feel with the fork. Additionally, the decision to route cables through the headset drew criticism for complicating routine maintenance, and the omission of a dropper post on the 100mm models was frequently cited as a frustrating specification choice for modern trail riding.