2020 Bird

Zero AM SRAM Eagle

A 27.5″ aluminum frame hardtail enduro bike with modest components.
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FrameAluminum
SuspensionHardtail, 150mm
ForkRockShox
Wheels27.5″ Aluminum
GroupsetSRAM
BrakesHydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Zero AM SRAM Eagle
Other Enduro bikes
Sizing
SM

5'3" – 5'9"

MD

5'6" – 5'11"

MD/LG

5'8" – 6'2"

LG

5'10" – 6'4"

XL

6'2" – 6'7"

🐐 Estimated

Rider Fit Notes

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Reviews
BikeRadar
Bird Zero 29 first ride review

May 2019 · Jonny Ashelford

As fun as a smaller-wheeled bike, but more efficient. Plays rough, but brings the speed

Read Review

off.road.cc
Bird Cycleworks Zero AM Boost MK3 Frame

Feb 2018

The Zero AM Boost is Bird’s newest iteration of the successful Zero AM and the brand’s encouragement to outright hooliganism. Stiff as a ramrod and as unforgiving as a religious cult, what it lacks in finesse it makes up for in outright breach of the peace. Progressive geometry will keep you safe all day long, however hard you like to rumble, all for a wallet-friendly sum.

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

Aluminum

BB StandardBSA, 73mm, Threaded

Fork

RockShox options: 35, Pike Select RC, Pike Ultimate RCT3, Lyrik Select RC, Lyrik Ultimate RC2

Travel150mm

Shock

N/A

Bottom Bracket

SRAM DUB, 73mm threaded

Headset

ZS44 upper, ZS56 lower, Options: Bird, Hope Tech

Stem

Race Face options: Aeffect R 35, 40mm length; Turbine R 35, 32mm length

Handlebar

Race Face options: Atlas 35, Turbine R 35, SixC 35 Carbon, Next R Carbon

Saddle

Fabric Scoop options: Radius Sport, Radius Elite, Radius Race Ti, Gel Radius

Seatpost

Options: Race Face Ride rigid, RockShox Reverb Stealth dropper, Bird Down dropper

TypeDropper

Pedals

N/A

Grips

Gusset S2, lock-on, 32mm diameter

Groupset
Rear Derailleur

SRAM drivetrain options: SX Eagle, GX Eagle, X01 Eagle, XX1 Eagle

Front Derailleur

N/A

Crank

SRAM options: X1000 (with SX Eagle drivetrain), Truvativ Descendant Alloy (with GX Eagle drivetrain), Truvativ Descendant Carbon (with X01 Eagle drivetrain), XX1 Eagle

Shifters

SRAM drivetrain options: SX Eagle, GX Eagle, X01 Eagle, XX1 Eagle

Cassette

SRAM options: NX Eagle (with SX drivetrain), GX Eagle, X01 Eagle, XX1 Eagle

Chain

SRAM options: NX Eagle (with SX drivetrain), GX Eagle, X01 Eagle, XX1 Eagle

Chain Guide

N/A

Brakes

SRAM options: Guide RE, G2 RSC, Code RSC, Shimano options: Deore M6000, M520, SLX M7120, Deore XT M8120

TypeHydraulic Disc

Brake Levers

SRAM options: Guide RE, G2 RSC, Code RSC, Shimano options: Deore M6000, M520, SLX M7120, Deore XT M8120

Wheels
Rims

DT Swiss options: XM481, EX511, FR560, XM521, M1900 Spline 30 wheelset, E1900 Spline 30 wheelset, XMC 1200 Spline 30 wheelset

Spokes

DT Swiss options: Competition, Competition Race, M1900 Spline 30 wheelset, E1900 Spline 30 wheelset, XMC 1200 Spline 30 wheelset

Front Hub

110x15mm Boost front, 148x12mm Boost rear, Options: Hope Tech Pro 4, DT Swiss M1900 Spline 30 wheelset, DT Swiss E1900 Spline 30 wheelset, DT Swiss XMC 1200 Spline 30 wheelset

Rear Hub

110x15mm Boost front, 148x12mm Boost rear, Options: Hope Tech Pro 4, DT Swiss M1900 Spline 30 wheelset, DT Swiss E1900 Spline 30 wheelset, DT Swiss XMC 1200 Spline 30 wheelset

Tires

Maxxis options: Minion DHF, Ardent, High Roller II, Shorty, Assegai, Rekon, Aggressor

Rider Notes
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Last updated May 14