Firebird 29

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. However, we can provide a rough guideline:

- Small: 5’4? – 5’9?
- Medium: 5’8? – 5’11”
- Large: 5’11” – 6’3?
- X-Large: 6’2?

We suggest that you pick your Firebird 29 size based on your riding style. The Firebird 29 features our longest geometry to date (increased reach measurements). Combined with both shorter seat tube and head tube measurements per size – this geometry means that most riders can go up or down a size and should base their choice on riding-style, reach and stem length preferences. Be sure to also consult our dropper post fit guide when making your selection. You can always reach out to us on Live Chat for additional guidance.

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

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.

The flip chip is a simple way to adjust the geometry on your Firebird 29. It allows you to either adjust the geometry for different trail conditions (using 29” wheels) or can allow for the use of 27.5 wheels X with 2.6’-2.8” tires as well. The chip comes set up in the low BB setting. This is perfect for riding fast, technical and steep terrain. However If the you preference is for a little more crank clearance and slightly quicker handling for tighter terrain with more climbing and/or roots and rocks, you may prefer the high BB setting. The high BB setting will raise the bottom bracket and steepen the head angle by ½ degree giving the bike faster turn in. Additionally, if you want to run 27.5 wheels X with 2.6’-2.8” tires, you would also need to run the bike in the High BB setting combined with our 17mm extended headset cup (more on that below). The combination of the higher BB setting and the taller cup allow the smaller diameter wheels to be used while maintain the same geometry and similar BB height to the bike set up with 29” wheels.

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.

Super Boost Plus 157 uses the existing chainline developed for DH bikes but uses standard trailbike BB widths and crank combinations to take 29” and Plus bike performance to the next level. The current Boost 148 standard moves the drivetrain out 3mm (providing 6mm more tire clearance) which is perfect for XC, and 27.5” enduro bikes, but it did not go far enough to meet the rapidly evolving 29” trail, enduro and 27.5” bike needs. Super Boost Plus 157 takes the concept further and optimizes it for 29” trail, enduro and Plus bikes by moving the drivetrain out a full 6mm (with a 12mm tire clearance gain) while maintaining the same Q factor (crank width) and heel clearance of our Boost 148 equipped bikes. Super Boost Plus 157 is a highly optimized combination of existing standards and technologies with a totally ridiculous (but highly descriptive) name. The Super Boost Plus 157 idea has enabled us to build the Firebird 29 with a level of performance previously unattainable with any other 29” or 27.5” enduro bike in the market.



* Ultra Short 16.96” (431mm) chainstays perfectly complements the Firebird 29’s long and low stature allowing you to manual up and over even the gnarliest obstacles while keeping the wheelbase length in check so that you can still clean tight switchbacks and rail corners with confidence and agility like you’ve never experienced before.

* A massive increase in tire clearance for running up 3.0” X 27.5 and 2.6” X 29” tires with incredible mud clearance: Who doesn’t like that! You can run your racy 29” X 2.4WT tires in the summer and then step up to something much wider in bad weather to extend your riding season or just plow through the mud on your 29er wheels with confidence knowing that the Firebird 29 can handle it all.

* Increased frame stiffness: A better performing bike allows you to push the limits even further and the Firebird 29 has no weak links. This is the bike that allows you to set new boundaries.

* Increased wheel stiffness: The Super Boost Plus specific hubs on all our Firebird 29 builds increase the hub flange width and provide for more even (better) spoke tension and the results are incredible. On a DT Swiss 29er alloy wheel with a 25mm inner width rim, the Super Boost Plus wheel is 46% stiffer then the same wheel built with a 142mm hub and 30% stiffer than the same wheel built with a Boost 148mm hub. Interestingly, the Super Boost Plus rear wheel and a standard Boost front wheel wi