17
FORK
The Blackbird is designed to work with Enduro / FR
forks with a single crown and 160-170mm travel, while
the Junior version is for forks with 130-140mm travel.
The Bluebird is designed to work with Trail / Enduro
forks with a single crown of 130-150mm of travel. Us-
ing other types of forks or a rear swingarm with greater
travel can damage the frame, injure the user or even
kill him.
REAR SHOCK
Blackbird from the 2021 season is designed to work
with Enduro / FR shocks measuring 230 x 65 mm,
while until the 2020 season the frame was compat-
ible with 216 x 63 mm (8.5 x 2.5 ”) shocks. From the
2020 season, Bluebird is designed to work with Trail
/ Enduro shocks (210 x 50 mm), and until the 2019
season with 190 x 51 mm (7.5 x 2.0 ”) shocks. Black-
bird Junior is compatible with 165 x 38 mm (6.5 x 1.5
”) shock absorbers. Using a different type of damp-
er, a damper of a different length, can damage the
frame, injure the user or even kill him.
HEADSET
The Blackbird and Bluebird frames feature a tapered
headstock for the IS42 / IS52 headset (bottom: 52mm
inner diameter/top: 42mm inner diameter). The
frame will fit forks with standard 1-1 / 8 ”steerer tubes
or 1.5 - 1-1 / 8” tapered steerer tubes. Importantly,
you should not cut the steerer too low. The process of
assembling the rudders in the frame should be per-
formed by a qualified mechanic.
BOTTOM BRACKET
The frame is designed to work with a BSA / ISO73 bottom
bracket only and accepts conventional threaded outer
bottom brackets such as SRAM GXP, Shimano BB73, or
FSA MegaExo. Before installing, make sure the bottom
bracket shell is clean, lightly greased, and free from dirt
and paint. The installation process should be carried out
according to the instructions of the cartridge manufac-
turer.
SPROCKET SIZES
The frame is designed to work with the 34T sprockets.
The maximum size of the sprocket is indicative only. May
vary by manufacturer, model, cranks, and bottom brack-
et used.
TIRES
Blackbird 29 ”, 27.5” and 26 ”JR are compatible with tires,
with a maximum size of 2.5”. Bluebird works with tires
with maximum dimensions of 2.4 „for the 29” version
and 2.8 „for the 27.5” version. Note that these numbers
are indicative as the size and shape of the tires may vary
depending on the manufacturer and the width of the rim
on which it will be mounted.
BRAKE COMPATIBILITY
The Blackbird 29 ”and 27.5” and Blackbird Junior brake
mounts are Post Mount 160 compatible. The Blackbird
29 ”and 27.5” maximum brake disc size is 203mm and
the Blackbird Junior is 180mm.
8. GENERAL INFORMATION
SEATPOST AND SEATPOST CLAMP
The frame works with 30.9mm seatposts. Internal armor
routing for dropper posts is available. Do not extend the
seat post above the minimum extension mark. The diam-
eter of the clamp on the seat tube is 34.9 mm.
WARNING:
It is important to make sure the rear tire does
not touch the saddle when the suspension is at its max-
imum travel. To check this, you must fully deflect the
rear suspension without the spring mounted on the rear
shock absorber.
