Frameset
Fork
Rockshox SID Select, DebonAir spring, Charger RL damper, tapered steerer, 15x110mm, Maxle Stealth, 44mm offset, 120mm
Rear shock
Rockshox SIDLuxe Select+, RL 3 position damper, 190 x 45mm
ZFS-5 120 120 GX Eagle
The Cervélo ZFS-5 120 is Cervélo’s interpretation of the modern downcountry-leaning XC race bike: a full-suspension platform built for current XCO tracks that are faster, rougher, and more technically demanding than traditional cross-country courses. Rather than creating a separate frame for different travel levels, Cervélo uses the same ZFS-5 chassis for both 100mm and 120mm versions, with the 120mm model achieved through a longer-stroke 190x45mm shock instead of the 190x40mm unit used on the shorter-travel setup. That makes the 120 a variation of the same race-focused platform, but one aimed more directly at riders who want extra margin and descending confidence without leaving the XC category.
The frame uses a linkage-driven single-pivot suspension layout with flex stays, a common contemporary solution in this segment because it keeps weight and complexity down while preserving pedaling efficiency. Cervélo pairs that with practical standards including a threaded BSA 73 bottom bracket and SRAM UDH compatibility, though the headset cable routing is a more divisive choice from a service standpoint. What distinguishes the ZFS-5 120 in the market is that it does not chase pure ultralight, razor-sharp XC-bike minimalism; instead, it sits in the increasingly important space between race bike and short-travel trail bike, with geometry and travel that reflect how elite XC equipment has evolved.
$5,250SRAM GX Eagle
Build
Size
| Stack | 610mm |
| Reach | 457mm |
| Top tube | 617.3mm |
| Headtube length | 114mm |
| Standover height | 754mm |
Fit and geometry
The ZFS-5 120’s geometry is notably progressive for an XC bike, and the numbers show that Cervélo intended it to be more capable on descents than older race platforms. Across the size range, the head angle sits at 66.6-66.7 degrees, which is quite slack by cross-country standards and should add front-end stability on steep or rough terrain. Reach figures are modern without being extreme—433mm in Medium, 457mm in Large, and 484mm in XL—paired with stacks from 600mm to 624mm, suggesting a fit that can still be raced aggressively but is less cramped and twitchy than traditional XC bikes. The effective seat tube angle stays around 75 degrees, which helps keep the rider centered for seated climbing and efficient pedaling.
Chainstay lengths grow slightly with size, from 432mm in Small to 440mm in XL, which is a sensible proportional approach that should help preserve weight balance across the range. Wheelbase numbers are correspondingly substantial for the category, at 1159mm in Medium and 1190mm in Large, reinforcing the bike’s stable, composed character at speed. A 33mm bottom bracket drop is fairly typical for this class, balancing cornering confidence with pedal-clearance needs on technical XC courses. Overall, the geometry points to a bike that should feel planted and forgiving for an XC machine, while still retaining the efficient rider position expected of a race-oriented platform.
Full specs
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, EXO 60 TPI, 29x2.4
Rear tire
Maxxis Rekon, EXO 60 TPI, 29x2.4
Cockpit
Stem
Race Face Aeffect R Alloy, 35mm clamp, 0 degree
Handlebars
Race Face Turbine R, 35mm clamp, 780mm width, 20mm rise
Saddle
Cervélo Saddle
Seatpost
Race Face Ride XC Alloy 30.9
Builds
The ZFS-5 120 range spans four builds from $5,250 to $8,700, with drivetrain choice and electronic shifting doing much of the price separation. The entry point is the 120 GX Eagle at $5,250, followed by the 120 GX AXS at $6,500, which brings SRAM’s wireless shifting to a more attainable point in the lineup. Above that, the 120 XT at $7,000 offers a Shimano-based alternative, while the top-end 120 X0 AXS at $8,700 is the premium SRAM option.
From the available build information, the main distinction is whether a rider wants mechanical SRAM GX, wireless SRAM GX AXS, Shimano XT, or higher-end SRAM X0 AXS. That gives the lineup a clear structure: the GX Eagle model is the value-oriented way into the frame, GX AXS targets riders who prioritize electronic shifting without going to the top tier, XT serves buyers committed to Shimano, and X0 AXS is the flagship build for riders willing to pay for the lightest and most premium SRAM option in the range.
120 GX Eagle
$5,250
SRAM GX EagleSelected
120 GX AXS
$6,500
SRAM GX Eagle AXS
120 XT
$7,000
Shimano Deore XT
120 X0 AXS
$8,700
SRAM X0 Eagle AXS