Name: Pivot Firebird 29 Pro SRAM X0 Eagle - Air Mountain Bike 2025 - Enduro Full Suspension MTB
Brand: Pivot

The DH-inspired long dw-linkTM maximises the rearward wheel path with 165mm of travel to give impressive levels of handling on the descents, yet still enables it to climb efficiently if uplifts aren’t an option.

The progressive geometry of this bike, with its relaxed head angle, long reach and equally long wheelbase, promotes stability with sharp responsiveness to inspire confidence at high speeds. Since the build is tailored to match different sizes of rider, for example by adjusting the length of the chainstays, the same performance will be delivered, regardless of your height.

The bike benefits from SRAM’s X0 Eagle Transmission wireless drivetrain, which can be fully set up in minutes via an app, without the need for adjustment screws or tuning post-setup. It eliminates the derailleur hanger and mounts straight onto the frame via the axle. Rather than being shielded by the hanger, the derailleur includes a mechanism called the ‘Overlord Clutch’, which moves it inboard and out of harm’s way on impact.

No hanger means less chance of failures and allows the cassette to move 2.5mm outboard for a 55mm chainline. This is turn means the crank is optimised for Boost and Super Boost, without the need for a wider Q factor.

The cassette features graduated cog progression, with minimal difference from the 52t cog to the next two, which are sized at 44t and 38t respectively. Shifting is therefore smooth, making changing gear on steeper terrain easier. As well, shifting is possible under loaded conditions, so the harder you pedal, the better your bike will shift.

The chainring has been beefed up in this drivetrain, while the aluminium crankset is billed as SRAM’s most advanced yet, with an exceptional stiffness to weight ratio. Meanwhile, the strong Flattop T-Type chain promotes superior shifting performance and low wear.

The shifter has exemplary adjustability and ergonomics, plus it can be mounted on the left or right, depending on which hand you prefer to use when shifting. You’ll be able to accelerate with confidence, too, knowing that the SRAM Code Silver Stealth four-piston calliper brakes will give you ample braking power when needed.

The Firebird is made to work with 29” wheels, but the flip chip will allow you to effortlessly adjust the frame geometry for different conditions or to accommodate 27.5” wheels or a mixed setup. The default is a low bottom bracket setting, which will optimise your control on fast, steep terrain and make room for wider tyres.

Flipping the chip raises the bottom bracket to accommodate a mixed wheelset, while inserting the 17mm extended headset cup achieves a perfect fit for 27.5” wheels. The head angle is steepened too, and together these adjustments encourage better cornering at speed and more efficient climbing.

This model uses the light alloy 30mm-29" DT Swiss XM1700 wheelset with DT Swiss 350 hub and 36t ratchet for rapid engagement. An all-rounder, it lives up to that claim, thanks to rims with a concentration of material only where needed for durability, a ratchet system with sloping teeth for minimum drag and instant engagement, and sturdy hubs and quality spoking that enhance the ride feel.

Benefiting from Super Boost Plus 157 spacing, originally pioneered by Pivot, enables the Firebird to use short chainstays, which are great for tight cornering, tyre clearance and a stiff rear swingarm. The Boost standard furthermore moves the drivetrain out 6mm, promoting better tyre clearance and mud shedding capabilities.

All these elements add up to a bike that handles superbly and manages to be both light and durable. It’s therefore possible to throw it around the singletrack with precision and confidence that the relaxed head angle, long reach and wheelbase will keep the bike stable at speed.

The perfect enduro machine, every element of this bike is tuned for speed
Features aggressive geometry for the perfect blend of speed, responsiveness and stability
Built around Pivot’s expertly moulded carbon fibre Firebird frame
Compatible with both 29” and 27.5” wheels, thanks to the adjustable geometry via the flip chip upper link mount
dw-linkTM suspension to maximise rearward wheel path, for control and a smooth ride
5” headtube provides front end stiffness
Full length, internal cable routing
The corrosion-resistant, Kashima coated Fox Factory Float X2 air shock offers 165mm of rear travel
Kashima coated, corrosion-resistant Fox Factory 38 GRIP2 fork, 44mm offset, giving 170mm of travel
Light, durable alloy DT Swiss XM1700 wheelset with DT Swiss 350 hub and 36t Star, 30mm-29", with a great weight to strength balance, 15x110 F/12x157 R
Maxxis Assegai 29" x 2.5" WT tyres
SRAM X0 Eagle Transmission 12-Speed Rear Derailleur
SRAM X0 1295 Eagle Transmission 10-52t cassette
SRAM AXS Pod Controller 12-Speed shifter
SRAM Code Silver Stealth 4-piston calliper
SRAM X0 Eagle DUB 32t crankset, aluminium
Phoenix Team Low Rise Carbon 800mm handlebar
Pivot Cycles’ Phoenix Team Enduro/Trail stem
Fox Transfer Factory Series seatpost
Phoenix WTB Volt Pro saddle

Occasionally, without notice, manufacturers change product design and/or specifications.

Mountain Bike Size Chart

Height	Bike Size	Mountain Bike Size
4’8” – 5’1” 143 – 155 cm	XXS	13” (33 cm)
5’1” – 5’4” 155 – 163 cm	XS	15” (38 cm)
5’4” – 5’7” 163 – 170 cm	S	16” (41 cm)
5’7” – 5’10” 170 – 178 cm	M	18” (46cm)
5’10” – 6’0” 178 – 183 cm	L	19” (48cm)
6’0” – 6’3” 183 – 191 cm	XL	20” (51 cm)
6’3” – 6’5” 191 – 196 cm	XXL	21” (53 cm)
6’5” – 6’9” 196 – 205 cm	XXXL	22” (56 cm)

* Mountain bikes are sized differently to road bikes. Typically, they are sized in inches as the first MTBs were produced in the USA. European brands like Lapierre and Haibike like to use centimetres for all their bikes. The measurements of their mountain bikes doesn’t match their road bikes but are like a simple conversion from the inches measurement. This is why we have included cm measurements in brackets for the Mountain bike column.

Read our bike size guide for more information on sizing.

Frame	Firebird full carbon frame
Fork	Fox Factory 38 GRIP2 fork, 44mm offset, 170mm
Rear Shock	FOX FACTORY FLOAT X2
Headset	Pivot Precision Sealed Cartridge
Stem	Phoenix Team Enduro/Trail - 45mm
Bars	Phoenix Team Low Rise Carbon 800mm
Front Brake	SRAM Code Silver Stealth 4-piston
Rear Brake	SRAM Code Silver Stealth 4-piston
Brake Lever	SRAM Code Silver Stealth
Rear Mech	Sram X0 Eagle Transmission 12-Speed
Shifters	SRAM AXS Pod Controller 12-Speed
Speed	12
Rims	DT Swiss XM1700
Front Hub	DT Swiss 350 hub 15x110
Rear Hub	DT Swiss 350 hub & 36t Star Ratchet 12x157
Front Tyre	Maxxis Assegai 29" x 2.5" WT, TR, 3C, EXO+, MAXXTERRA
Rear Tyre	Maxxis Assegai 29" x 2.5" WT, TR, 3C, EXO+, MAXXTERRA
Seat Post	Fox Transfer Neo Factory Series 150mm (SM), 200mm (MD-XL)
Saddle	Phoenix WTB Volt Pro
Chainset	SRAM X0 Eagle DUB 32t
Chain	Sram X0 Eagle Transmission Flattop 12-Speed
Cassette	Sram X0 1295 Eagle Transmission 10-52t

Won't Be Beaten

Pivot Firebird 29 Pro SRAM X0 Eagle - Air Mountain Bike 2025 - Enduro Full Suspension MTB

Mountain Bike Size Chart

Pivot Firebird 29 Pro SRAM X0 Eagle - Air Mountain Bike 2025 - Enduro Full Suspension MTB