PIVOT FIREBIRD FULL
PIVOT FIREBIRD PLUS

PIVOT FIREBIRD PLUS

Super Boost Plus 157 is a highly optimized combination of existing standards and technologies with a totally ridiculous (but highly descriptive) name.

PIVOT FIREBIRD FULL

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. 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 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. So, there is already a wide range of hub brands with optimized 157mm spacing available (even if they don’t specifically call it SB+) some examples include: DT Swiss, Industry 9, Stan’s, Onyx, Chris King, White Industries, Race Face, SUNringlé, Shimano, Stealth, Tune, Newmen and Hope. Most hub companies have already adopted the wider spoke flange to their DH 157mm hubs because of the added benefits. Super Boost Plus 157 builds on the idea of wider flange spacing pioneered by Boost 148 by spreading the flanges even wider (up to 14mm wider than a 142mm hub) which increases spoke bracing angle resulting in a huge wheel strength increase on 27.5” and 29” trail, enduro, all mountain, eMTB and trail category wheels. Super Boost Plus 157 retains narrower Q factor and heal clearance while providing for more tire clearance, a stronger frame and a stronger rear wheel. The rear hub spacing is the standard 157mm spacing available from every hub manufacturer in the world so any 12mm x 157mm hub is compatible with the Firebird 29. The Firebird 29 uses a 157mm rear hub spacing in a configuration called Super Boost Plus 157 (SB+). The combination of the higher BB setting and the taller cup allow the smaller diameter wheels to be used while maintaining the same geometry and similar BB height to the bike set up with 29” wheels. Additionally, if you want to run 27.5” wheels 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 high setting is also a great starting point for running a 27.5” rear/29” front “reverse mullet” setup. The high BB setting will raise the bottom bracket and steepen the head angle by ½ degree giving the bike faster turn in. However, if your 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.

This is perfect for riding fast, technical and steep terrain. The chip comes set up in the low BB setting. 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 with 2.6”-2.8” tires and a 27.5” rear/29” front “reverse mullet” setup as well. The flip chip is a simple way to adjust the geometry on your Firebird 29.

Pivot firebird