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CRUSHES CLIMBS, SLAYS DECENT…AND REWRITES THE 29ER PLAYBOOK

The Firebird is the no-compromise, Holy Grail of long-travel mountain bikes; it’s both an enduro bike that devours blazing descents and a technical climber that gains elevation astonishingly well.

For enduro racers, the tough and light Firebird’s peerless climbing traction, descending capability and instant acceleration makes it the perfect choice for the steep, punishing courses of the EWS. For park riders, the Firebird’s long front-center and short chainstay combination provides that nimble, snappy feel that encourages bold line choices yet allows you to stay in complete control at World Cup speeds.

 

  • Bomber—yet ultra light—full carbon frame featuring leading edge carbon fiber materials and Pivot’s proprietary molding technology
  • 170mm of supple-yet-efficient dw‐link® suspension
  • Ultra-adjustable Fox Float X2 rear shock (on most build kits)
  • Long-and-low geometry for a confident, stable stance
  • Ultra-short, 430mm (16.95”) chainstays make easy work of the tightest trails
  • Equipped with a burly Fox 36 Factory 170mm-travel fork
  • Fits tires up to 27.5×2.5” wide
  • 12 x 148mm Boost™ rear spacing for additional stiffness and control
  • Hassle-free, full-length, internal cable routing. Fully Di2 compatible
  • Fits a wide range of riders (between 5’4″ and 6’7″)
  • 10-year warranty

 

Pivot Firebird Geometry

 

Firebird Carbon

 
 
SM MD LG XL
A Seat Tube Length
39.37 cm
42.55 cm
45.72 cm
49.53 cm
B Top Tube Length 59.36 cm 61.57 cm 63.80 cm 66.09 cm
C Head Tube Length 10.01 cm 11.00 cm 11.99 cm 13.00 cm
D Head Tube Angle 65.00° 65.00° 65.00° 65.00°
E Seat Tube Angle (Eff.) 74.5° 74.5° 74.5° 74.5°
F Chain Stay Length 43.00 cm 43.00 cm 43.00 cm 43.00 cm
G Bottom Bracket Height 34.92 cm 34.92 cm 34.92 cm 34.92 cm
H Standover Height 70.79 cm 71.70 cm 71.70 cm 72.29 cm
I Wheelbase 117.50 cm 120.42 cm 122.42 cm 125.27 cm
  Stack 58.60 cm 59.51 cm 60.40 cm 61.29 cm
  Reach 42.01 cm 44.50 cm 46.51 cm 48.49 cm

 

 

 

LIGHTWEIGHT MADE BULLET PROOF

Pushing the pace both up and down the mountain requires a strong chassis that’s still light enough to make climbing fun. The heart of the new Firebird is a cutting-edge, carbon frame with a stout, double-wishbone rear triangle and ultra-stiff linkage design.  Thanks to our own hollow-core, high-compression carbon molding process and an exacting combination of composite materials and shapes, we are able to deliver an ultra-light frame that meets the same stringent testing requirements for strength and stiffness as our World Cup downhill bike. How light are we talking? It’s possible to build a complete Firebird weighing less than 28 pounds.

STATE-OF-THE-ART SUSPENSION

The Firebird Carbon uses the best attributes of Dave Weagle’s renowned dw‐link® rear suspension to achieve the ultimate in both downhill and climbing performance. The dw-link’s anti-squat and variable wheel travel path traits yield both the square-edge bump absorption of a downhill bike and the crisp, pedaling efficiency of a shorter-travel trail bike. It’s a hell of a combination.

CONFIDENT YET NIMBLE

Building on its reputation as the bike for all-day missions on black diamond terrain, the Firebird features long measurements combined with a 65-degree head angle to deliver unmatched stability and handling. Taking a page from the Phoenix DH Carbon’s progressive geometry, the Firebird combines some of the longest reach measurements in the sport, with super-short, 16.95” chainstays.  The Firebird’s long and low geometry gives you increased stability at high speeds and on steep technical challenges, while its short chainstays provide a maneuverable, dynamic ride that makes it easy to put the bike precisely where you want it.

 

TOTAL CONTROL

Next, we equipped the Firebird with Fox’s class-leading Float X2 shock*. Our top racers consistently choose the Fox Float X2 air shock for its incredible control, tuneability and plush coil-like feel. Or to put a finer point on it—this shock gets the nod because it allows you to hit downhills faster with greater confidence. On top of that, the Float X2’s climb switch makes the Firebird an Enduro-style rider’s best choice for getting up and down the mountain. To match the Firebird’s rear suspension, we’ve paired it with the latest 170mm Fox 36 Factory Boost fork – the perfect choice for aggressive, balanced handling in technical terrain.*

* Pro XT/XTR Pro and Pro XO1 Eagle bikes feature the Float X Performance rear shock, which features hard-anodized body and independent, low-speed compression and rebound adjustments. XT Race builds feature the Float X2 Performance rear shock and Fox 36 Performance Boost fork.

TECH SPECS

FAQ

Which size bike should I purchase?

To ensure the best sizing, we recommend that you visit your local Pivot dealer to get a professional fit and refer to our geometry chart to check your measurements. We suggest that you pick your Firebird size based on your riding style. 

The Firebird features long and low geometry with a sizing philosophy similar to the Phoenix DH. The Firebird’s reach measurements push new limits (they are long). Additionally, with both shorter seat tube and head tube measurements per size, riders have a wider range of bike sizes to choose from depending on your riding style and preferences. Some riders may find it comfortable to go up or down a size depending on their reach and stem length preferences. Below is a general guideline: 

Small: 5’4.5″ – 5’9” 
Medium: 5’7” –5’11” 
Large: 5’10” – 6’3” 
X‐Large: 6’2” +

How do I set the sag on my bike?

We make it easy to get the best ride out of your Pivot bike with a simple sag indicator already installed on your shock, and this follow-along video featuring our own Bernard Kerr:

https://vimeo.com/pivotcycles/sag

How much does it weigh?

Variables in frame size, discrepancies in scale calibrations, and method of weighing (with or without pedals and such) all lead to inaccurate comparisons, so we choose not to publish our bike weights. Pivot bicycles are among the lightest available, but the weight is only one of many factors that make a great bicycle. Other aspects such as frame stiffness, strength, durability, and ride quality are just as important as weight to our engineers when designing our Hollow Core Carbon and aluminum frames. Instead of comparing grams online, we suggest you visit your local Pivot dealer and see our attention to detail, smart, high value spec, and class leading features. Bring a scale if you’d like, but take just one demo ride and you’ll feel why Pivot Cycles are the most well-rounded, highest performing bicycles on the market and in many cases, yes, it’s the lightest as well.

What dropper post length should I use on my Firebird?

The Firebird uses a 30.9mm size post and features a low stand-over height and short seat tubes to allow the use of longer travel dropper posts and/or more flexibility for a wider range of rider sizes. There are some limitations that each dropper post can accommodate for each frame size based on the individual riders saddle height, so it is important to check fit before choosing the travel and model of dropper post for your Switchblade. Use the linked guide to find the right post for your bike:  https://www.pivotcycles.com/wp-content/uploads/2016/08/Firebird-Dropper-Fit-Guide.pdf

What hub/wheel spacing does the Firebird use?

The Firebird uses the Boost 148mm X 12mm hub/wheel spacing. This is a new hub design with wider flanges so you cannot take a current 135mm, 142mm, 150mm, or 157mm hub and change end caps to convert an existing hub.

What do I need to know to switch between 29” and 27.5”+ wheels?

The 27.5” wheels with Maxxis 2.8” tires have a smaller diameter than the 29” wheels with 2.4” and 2.5” wide trail tires used on the Firebird 29. This difference results in a lower bottom bracket height when running 27.5” wheels. To adjust the BB height, the Firebird 29 comes a flip chip upper link mount with high and low settings. Pivot also sells an optional 17mm lower headset cup that when used in conjunction with the high flip chip setting brings the bottom bracket back to the same height as when using 29er wheels in the low chip setting. Some riders will just leave the 17mm cup in regardless of wheels size. Please note that we ship all complete bikes with enough spacers to allow for the addition of a 17mm cup. If the fork is pre-cut for the zero-stack cup and additional spacers are not installed, you will not have a long enough fork steer tube to run the 17mm cup option.

What rear hub spacing is used on the Firebird 29?

The Firebird 29 uses a 157mm rear hub spacing in a configuration called Super Boost Plus 157. The rear hub spacing is the standard 157mm spacing available from every hub manufacturer in the world so any 157mm X 12mm hub is compatible with the Firebird 29. Super Boost Plus 157 builds on the idea of wider flange spacing pioneered by Boost 148. Super Boost Plus spreads the flanges even wider (up to 14mm wider than a 142mm hub) and increases wheel stiffness substantially, which is a huge benefit on 29” enduro and 27.5” wheels. Although any 12mm X 157mm hub can be used, the special Super Boost Plus versions developed with Pivot, DT Swiss, Industry 9, and Reynolds makes for a highly optimized 29er enduro and 27.5+ wheel combinations that take wheel performance to another level. SRAM also offers a similar concept 157mm hub in their standard XO line. Super Boost Plus Hub flange spacing is also available on wheels from Stan’s and hubs from Onyx. Most hub companies are adopting the Super Boost wider flange spacing to their 157mm hubs so if you have a particular brand of hub that you are looking at, its best to check with the manufacturer as to what they are running.

What is the thread pitch on the rear axle?

Pivot uses a 1.5 thread pitch on the rear thru axle. You can order one through our online store here: http://www.pivotcycles.com/store/index.php?route=product/product&path=60&product_id=132

What travel fork can I use on my Firebird?

The Firebird was designed a 170mm fork. The maximum travel length that can be used on the Firebird is 180mm travel.

What is the fork offset on the Firebird?

The fork offset for the Firebird is 44mm.

How wide of a tire can I run on the Firebird?

The Firebird was designed to run 27.5” wheels with up to 2.5” tires. We are partial to the new line of Maxxis Wide Trail tires that come in either 2.4” or 2.5” depending on the model. All Firebird complete bikes come with 2.5”Maxxis Minion DHF 2.5” Wide Trail front and 2.4”Minion DHRII Wide Trail rear. The Firebird is not 27.5+ compatible.

What size seatpost does the Firebird use?

The Firebird frame uses a 30.9mm seatpost.

What size seat clamp does the Firebird use?

The Firebird frame uses a 34.9mm or 35mm (as some manufacturers call it) seatpost clamp.

What front derailleur does the Firebird use?

The Firebird uses an e-type Shimano side-swing style front derailleur only. Shimano produces the new e-type side-swing front derailleur in Deore and SLX for 10 speed drivetrains and XT and XTR for 11 speed drivetrains.

Can I run a chain guide on the Firebird?

Yes. The Firebird features ISCG05 mounts on the frame. Most upper guides on the market will fit and you can either use the ISCG05 mounts or some of the more compact versions that attach to an E-Type front derailleur mount. For full upper and lower guides, we recommend the MRP AMG for the Firebird. What headset do I need?

What headset do I need?

The Firebird uses a ZS (zero stack) 49.6mm top and can also accept a standard 1.5 external top cup. This large upper cup design provides more room for riders wanting to experiment with angleset™ headsets to adjust front end geometry. The lower (bottom) cup is a (zero stack) 56mm size.

How large of a rotor will fit on the Firebird?

The Firebird was designed for a 180mm rear rotor and features a 180mm post mount design, so you cannot fit a 160mm rotor on the Firebird. A 203mm rotor will fit with the use of a post mount caliper adapter.

What type of rear brake adapter do I need?

No brake adapter is needed for a 180mm rotor. However, if you’d prefer to run a 203mm rotor, you would need a proper direct mount/post to post adapter to go from a 180mm to 203mm rotor.

What cranks and bottom bracket will the Firebird accept?

The Firebird will accept all cranks designed for the BOOST system and compatible with a press fit 92mm bottom bracket. BOOST system means that the rear hub spacing is 148mm and the chain-rings have been shifted out approximately 3mm from where a tradition crank designed for a 142mm rear hub would be so that the chainrings will line up properly with the new position of the cassette on the 148mm rear hub.

Can I run non-Boost™ cranks on my Firebird Carbon?

In some cases you can run a conventional non-BOOST 1X or 2X crank. The Race Face NEXT 1X and other Cinch system 1X cranks are dual compatible between standard 142mm and 148mm Boost rear ends. Some smaller chainring combination 1X (30 and 32T) Shimano XT and XTR 11 will also work. In some cases 2X standard cranks may also work with 24/34, 26/36 and 22/36 combinations. Shimano’s new 11 Speed XTR and XT standard cranks feature both 24/34 and 26/36 chainring options which work perfectly with the Mach 6 Carbon frame as Shimano’s chainline dimensions already tend to run wider than others in the market. There may be other 2X non- boost cranks available that will work although it is dependent on specific chainline and chainring size. If the chainline is not out far enough, the front derailleur clearance may be tight when shifting into the small ring as the front derailleur mount on the Firebird is also shifted outwards to accommodate the BOOST design.

What is the eye-to-eye shock length and stroke length on the Firebird?

The eye-to-eye shock length is 8.5 inches and the stroke length is 2.5 inches.

What is the eye-to-eye shock length and stroke length on the Firebird 29?

The Firebird 29’s metric shock has a 230mm eye-to-eye length and 65mm stroke.

If I want to run a different brand of shock on my Firebird, what else do I need to know?

The Firebird shock uses M8 through bolt hardware on the front and no hardware on the rear. Shock spacer dimensions are 22mm wide front. On the rear of the shock, the spacer hardware and bushing will need to be removed as the strut mounts directly to the shock body. Some shocks may have a different spec then the Fox shock (that the Firebird Carbon is designed for) and may not fit properly. Also, as we cannot test every shock on the market, riders assume some risk if they choose a shock that does not fit properly or is not tuned correctly for the bike. The frame is designed around a large volume air can. We run medium compression valving and medium rebound damping.

Can I put a coil-over shock on my Firebird?

We do not recommend that you run a coil-over on your Firebird. The Firebird was designed to work with the progressiveness of an air spring. Running a coil-over shock on the Firebird Carbon will result in hard bottoming and could result in damage to the frame and shock. Additionally, the clevis design adds considerable leverage to the unsupported shock shaft and internal piston bushing on a coil shock that can result in premature wear of the shock and/or, a total failure of the shock shaft. For maximum performance and durability, we recommend staying with the Pivot spec’d FOX Float X2 shock (or DPX2 on our race builds). The Pivot Factory Racing DH World Cup team has the option of running either the FOX X2 air or coil on their DH bikes and each rider has found the air shock to offer better performance and control and ultimately faster times on the race course. However, if you want to run a different shock, then stick with an air shock such as the Rock Shox Super Delux or Vivid Air or another DH based air shock design that features a tunable spring curve. Any frame damage occurring due to shock failure from using any shock other than the Pivot supplied FOX Float X2 or DPX2 will not be covered under warranty.

What are the torque specs?

A detailed PDF of the torque specs can be found under the “Tech Specs” tab.