Pivot Firebird Pro X0 Eagle Transmission FOX Float X2 w/Carbon Wheel Upgrade

The Pivot Firebird Pro X0 Eagle Transmission FOX Float X2 Bike with Carbon Wheel Upgrade is Pivot's enduro platform — the longer, slacker, more aggressive sibling to the Switchblade, built for riders who want maximum capability on technical terrain and aren't willing to make climbing concessions to get it. Where the Switchblade runs 142mm of rear travel and a 66° head angle for all-mountain versatility, the Firebird runs 165mm rear and 170mm front through a DW-Link derived from Pivot's Phoenix downhill bike, with a 63.8° head angle that makes its intentions clear. The Pro X0 build at $9,999 includes SRAM X0 Eagle Transmission wireless electronic shifting, full FOX Factory suspension front and rear, and an upgrade from the standard DT Swiss alloy wheelset to Reynolds Blacklabel carbon rims on Industry Nine Hydra hubs — a wheel combination that improves rotational weight, engagement speed, and durability on technical terrain in one package.

The Firebird's Hollow Core carbon frame uses size-specific tuned layups — each frame size has its own carbon schedule for tube thickness, profile, and fiber arrangement to produce consistent ride character from XS to XL. Molded protection covers the down tube, seatstay, and chainstay where trail debris does the most damage. The DW-Link suspension on the Firebird is specifically calibrated to its 165mm travel and enduro intent: a longer lower link geometry derived from the Phoenix DH bike produces a more rearward axle path than the Switchblade's linkage, which means the rear wheel tracks over square-edge impacts and exposed roots more reliably rather than deflecting off them. The system uses high anti-squat to resist pedal bob on climbs without the harshness of a fully locked platform. The FOX Float X2 Factory rear shock (205x65mm trunnion mount, Kashima-coated) handles the suspension stroke with independent high- and low-speed compression and rebound adjustment. Pivot builds in two adjustment systems for dialing geometry: a two-position flip chip at the shock linkage adjusts bottom bracket height by 5-6mm and head angle by half a degree, and the Swinger dropout system provides 8mm of chainstay length adjustment for climbing or descending tuning. The 12x157mm Super Boost Plus rear spacing stiffens the rear triangle and improves chainline for the 1x drivetrain.

The FOX 38 Factory fork at the front runs 170mm of travel with a GRIP2 damper — independent high- and low-speed compression and rebound adjustment on both ends — through a 44mm offset chassis on a 15x110mm Kabolt-X axle. The GRIP2 damper's Variable Valve Control technology is genuinely tuneable for different terrain and rider weights, which matters on a bike that covers a wide range of riding conditions. The drivetrain is SRAM X0 Eagle Transmission — one tier below XX in the T-Type wireless electronic platform, and genuinely difficult to distinguish from XX in real riding conditions. The X0 Eagle Transmission rear derailleur mounts directly to the frame's UDH with no traditional hanger, making it crash-resilient in the way that matters on enduro terrain. A 32T SRAM X0 Eagle DUB chainring runs against a 10-52T X0 Eagle cassette via the X0 Flattop chain — 520% of gear range for the full spectrum from fire road grind to technical descent. SRAM Code RSC 4-piston hydraulic disc brakes with 200mm Centerline Centerlock rotors front and rear are the appropriate brake for sustained enduro descents — more power reserve than a 2-piston setup and the modulation to use it precisely.

The carbon wheel upgrade consists of Reynolds Blacklabel Enduro Pro carbon rims at 34mm internal width on Industry Nine Hydra hubs — 6-pawl, 690 engagement points, 15x110mm front and 12x157mm rear (Super Boost Plus). 690 engagement points means the Hydra hub is essentially instantaneous on technical climbs where milliseconds of pickup matter for maintaining momentum. The total wheelset weight comes in at approximately 1,768g, a meaningful improvement over the standard DT Swiss XM1700 alloy build. Continental Kryptotal FR 2.4" front and Kryptotal RE 2.4" rear tires provide the directional tread pattern that most enduro riders want — FR compound for forward roll and cornering bite, RE for rear traction under braking and acceleration. The FOX Transfer dropper post (150mm travel on L/XL) gives the seat clearance needed on technical descents, and the WTB High Tail saddle — co-developed with Pivot specifically for big-wheeled long-travel bikes — provides rear tire clearance at suspension bottom-out.

Design Benefits

1. Phoenix DH-derived DW-Link kinematics. The Firebird's longer lower link produces a more rearward axle path than the Switchblade's linkage — borrowed directly from Pivot's Phoenix downhill bike. The wheel tracks into impacts rather than deflecting off them, which is what makes the Firebird feel planted on the kind of rough, chunky descents that separate enduro bikes from trail bikes.
2. Full FOX Factory suspension front and rear. FOX 38 Factory with GRIP2 and FOX Float X2 Factory is the specification that World Enduro Series racers run. Both dampers offer independent high- and low-speed adjustment on compression and rebound — four independent adjustments on the fork alone — which means the suspension can be set up precisely for rider weight and terrain rather than accepting a compromise position.
3. Reynolds Blacklabel / Industry Nine Hydra carbon wheel upgrade. 690 engagement points on the Hydra hub means near-instantaneous pedal pickup — a detail that matters specifically on the kind of technical, punchy climbs where enduro stages are won and lost. Reynolds Blacklabel carbon at 34mm internal width handles the forces of aggressive descending without the weight of an alloy rim.
4. SRAM X0 Eagle Transmission with UDH direct-mount. The hangerless T-Type setup is crash-robust in a way that matters on enduro terrain. Combined with 10-52T gearing, the X0 Transmission handles everything from sustained fire road climbs to technical descent without a mechanical weak point.
5. SRAM Code RSC 4-piston brakes with 200mm rotors. The Code RSC is the brake that appears on EWS podium bikes — genuine stopping power with SwingLink lever feel and enough modulation to use 200mm rotors precisely on technical descents rather than just grabbing.
6. Dual geometry adjustment systems. The flip chip adjusts the bike's overall character (BB height and head angle); the Swinger dropout adjusts chainstay length for climbing or descending tuning. On a bike that gets ridden in genuinely varied conditions, the ability to tune both independently is a meaningful feature.
7. 63.8° head angle. Not a trail bike that got slack — a purpose-designed enduro geometry that's stable at speed on steep, technical terrain and requires the right body position to ride well. This is the head angle that Pivot chose for a bike that competes at the World Enduro Series level.

Final Take

The Pivot Firebird Pro X0 Eagle Transmission with Carbon Wheel Upgrade is built for riders who've decided that enduro riding is the priority and want a bike calibrated for that decision rather than toward a trail-bike compromise. The Phoenix DH-derived DW-Link, FOX Factory suspension, and X0 Eagle Transmission drivetrain form a coherent enduro race platform. The Reynolds Blacklabel / Industry Nine Hydra wheel upgrade puts that platform on the best production wheel combination Pivot offers at this build level. At $9,999, this is what serious enduro capability looks like before you step into the Team build.