Specialized JETT 24 User manual

ASSEMBLY GUIDE
EN / FR / DE / ES / PT / CNS

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We may occasionally issue updates and addendums to this document. Please periodically check
www.specialized.com or contact Rider Care to make sure you have the latest information.
Info: specialized.com / 877-808-8154
SPECIALIZED BICYCLE COMPONENTS
15130 Concord Circle, Morgan Hill, CA 95037 [phone]
0000158849_UM_R2, 08/21

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An informative and important video explaining how to properly assemble the Jett is available.
It also demonstrates how to do a safety check once assembled. This assembly/setup guide is
intended to be used together with the video. Visit www.specialized.com/setupmyjett or scan
the QR code with your smartphone camera.
1.1 INTENDED USE
The Jett bicycle is intended and tested for use by children only (Condition 6).
CONDITION 6 Bicycles designed to be ridden by children.
Parental supervision is required at all
times. Avoid areas involving automobiles,
and obstacles or hazards including
inclines, curbs, stairs, sewer grates or
areas near drop-offs or pools.
1. INTRODUCTION
This assembly/setup guide is specific to your Specialized Jett bicycle. It contains important
information about assembly and safety, which you should read before the rider's first ride
and keep for reference. You should also read the entire Specialized Bicycle Owner’s Manual
(“Owner’s Manual”) because it has additional important general information and instructions
which you should follow. If you do not have a copy of the Owner’s Manual, you can download
it at no cost at www.specialized.com, or obtain it from your nearest Authorized Specialized
Retailer or Specialized Rider Care.
Assembly of this bicycle requires experience in the use of basic tools as well as general
knowledge regarding bike maintenance. If you do not have such experience, it should be
assembled by an Authorized Specialized Retailer.
When reading this user manual, you will note various important symbols and warnings, which
are explained below:
WARNING! The combination of this symbol and word indicates a potentially
hazardous situation which, if not avoided, could result in serious injury or
death. Many of the Warnings say “you may lose control and fall.” Because
any fall can result in serious injury or even death, we do not always repeat the
warning of possible injury or death.
This symbol alerts the reader to information which is particularly important.
SET UP
MY JETT
specialized.com
/setupmyjett
FOR
CHILDREN
ONLY
6

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2. WHAT IS IN THE BOX
4
6
3
2 7713 910
1
12 8
5
11
1.2 WARRANTY
Please refer to the written warranty provisions provided with your bicycle, or visit
www.specialized.com. A copy is also available at your Authorized Specialized Retailer.
1.3 STRUCTURAL WEIGHT LIMITS
MODEL MAX CARGO
(lb / kg)
MAX STRUCTURAL INCL
CARGO (lb / kg)
16/20 30/14 100 / 45
24 30/14 220/ 100
STRUCTURAL WEIGHT LIMIT: The maximum total weight (rider and cargo) a bicycle is
designed and tested to support structurally.
CARGO WEIGHT LIMIT: The maximum cargo weight a bicycle has been designed and tested
to support structurally.
For more information on the intended use and structural weight limits for the
frame and components, please refer to the Owner's Manual.

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#DESCRIPTION TORQUE
TOOL SIZE Nm in-lbf
1FRAME
2FORK
3SEATPOST/SADDLE
4HANDLEBAR
5
SEAT COLLAR 5 mm hex 7 62
6STEM 4 mm hex 5 45
7FRONT/REAR WHEEL 15 mm wrench 3/8 turn
8PEDALS 15 mm wrench 1/16 turn
9REFLECTORS Phillips screwdriver
(not provided)
10 TORQUE WRENCH
11 HEX BITS 4, 5, 6* mm hex bits
12 FLAT WRENCH 15 mm wrench
13 MANUALS
*Included with certain models.
3. ASSEMBLE THE BICYCLE
UNPACK THE BOX
WARNING! CHOKING HAZARD - packaging may contain small parts. Not for
children under 3 years old. The Jett bicycle must be assembled by an adult.
Follow the steps below and perform a safety check before riding.
A
3.1
Fig. 3.1
Remove any security tape, then pull out each of the four tabs (A).
Lift the top of the box up and off the base packaging.
The Jett 16 box opens at the top. Remove any security tape, then pull out the
tabs and open the top of the box. Lift the bike and its internal packaging out of
the box and continue with the assembly steps.

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3.2
Fig. 3.2
In the rear packaging tower, pull out the tabs holding the small parts box in place, then
remove the small parts box.
Open the small parts box and remove the manuals, pedals, reflectors, and all the tools
required for assembly.
3.3
Fig. 3.3
Lift and remove the packaging brace.

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1
2
4
3
3.4
Fig. 3.4
In the front packaging tower, lift both the handlebar and interior packaging (1), then slide
the packaging off of the handlebar (2).
Pull the handle bar forward and out of the center packaging tower (3), then lift the center
packaging tower off of the bicycle (4).
3.5
Fig. 3.5
Pull out the tabs on the bottom of the front packaging tower (three total, one on each side).
Lift and remove the front packaging tower.

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USING THE TORQUE WRENCH & FLAT WRENCH
Your Jett bicycle is supplied with a custom torque wrench and flat wrench which should be
used to tighten the bolts where indicated. It is important to properly use a torque wrench
during assembly to make sure all bolts are tightened to specification. Keep both wrenches for
future adjustments and maintenance.
WARNING! Correct tightening force on fasteners (nuts, bolts, screws) on your
bicycle is important for your safety. If too little force is applied, the fastener may
not hold securely. If too much force is applied, the fastener can strip threads,
stretch, deform, or break.
An incorrect tightening force can result in component failure, which can cause
you to lose control and fall. Where indicated, ensure each bolt is torqued to
specification. After your first ride, and consistently thereafter, recheck the
tightness of each bolt to ensure secure attachment of the components.
Following are instructions on how to use the provided torque wrench and flat
wrench. If after reading the instructions you are still unsure of how to use the
torque wrench or flat wrench, please contact your Authorized Specialized
Retailer for assistance.
3.6
Fig. 3.6
While holding the rear packaging tower, roll the bicycle forward out of the base packaging.
Flip the kickstand down to hold the bicycle upright for assembly.
Do not remove Jett 16 models from the rear tower and base packaging until
the rest of the assembly steps are completed. The Jett 16 does not come with a
kickstand. The packaging will hold the bicycle upright during assembly.
RECYCLE: Please recycle all of the packaging.

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B
A
3.7
Fig. 3.7
HOW TO USE THE TORQUE WRENCH
Two different hex bits are provided with the torque wrench for single-speed Jett models: 4 mm
and 5mm. If you have a multi-speed Jett model, the torque wrench is also provided with a 6
mm hex bit to adjust the crank length.
Determine which hex bit is needed and insert it into the socket of the torque wrench (A).
When there is no tension on the torque wrench lever arm, the right-side edge of the arm is
aligned with the small white line to the left of the “0” (B).
A
3.8
Fig. 3.8
Insert the torque wrench into the bolt head (A) and turn the lever arm clockwise until you
feel resistance and the lever arm starts to flex.
Once the lever arm starts to flex, apply the correct torque to the bolt by turning the lever
until the torque pointer is aligned with the applicable numbered line on the torque gauge,
then stop and remove the troque wrench from the bolt (e.g. if the specification is 6 Nm,
turn until the torque pointer is aligned with the line to the left of "6"). Torque settings are
listed for each individual bolt and nut in Section 2.

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3.9
Fig. 3.9
Do not touch the wrench gauge faceplate with your fingers when torqueing as this could
give you a false reading.
1/16th
0°
180°
90°
3/8th
0°
180°
90°
3.10
Fig. 3.10
HOW TO USE THE FLAT WRENCH
When using the provided flat wrench, as indicated, use the following general guidelines to
achieve proper torque:
To properly tighten a bolt without a torque wrench, each bolt or nut must be turned a
specific amount to get it to its ideal torque range. The amount of rotation is listed for each
individual bolt and nut (Section 2).
When using the flat wrench, start at a position where the bolts or nuts are loose and can
spin freely, then start turning the bolt or nut clockwise until some tension is felt.
Once tension is felt, tighten the bolt or nut the specified amount of rotation.

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INSTALLING THE HANDLEBAR
The stem comes pre-installed and aligned on the bicycle. The handlebar assembly needs to be
installed on the stem.
AB
CD
3.11
Fig. 3.11
Loosen the faceplate bolts (A) to remove the faceplate (B) from the stem (C).
Place the handlebar against the stem.
Thread each bolt through the faceplate and into the stem body until they are equally finger-
tightened and the upper and lower gaps between the stem body and faceplate are equal
(D).
3.12
Fig. 3.12
Make sure the handlebar is centered with the stem by vertically and horizontally centering
the handlebar logo in the stem faceplate.
Visit specialized.com/setupmyjett to determine the number position the
handlebar should be set to for the rider.

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1
3
2 4
Nm
5
45in-lbf
4 mm
Nm
3.13
Fig. 3.13
In an alternating (cross) pattern, using the supplied torque wrench and 4mm hex bit,
tighten each faceplate bolt approximately 1/2 turn, then repeat the cross pattern to torque
each bolt to 5 Nm / 45 in-lbf.
A B
3.14
Fig. 3.14
Once assembly is complete, double-check to make sure the stem and handlebar are
aligned with the front wheel. Fig. 3.14 A shows a properly aligned handlebar/stem. Fig. 3.14
B shows an improperly aligned handlebar/stem.

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ADJUSTING THE SEATPOST HEIGHT
3.16
Fig. 3.16
Using the 5 mm hex bit, loosen the seat collar bolt.
Set the saddle height at a position that you feel approximates the correct height for the
rider, then tighten the seat collar bolt.
5
45in-lbf
4 mm
Nm
3.15
Fig. 3.15
The stem comes pre-installed and aligned. Should you need to adjust the stem, use the
supplied wrench to loosen the bolts on the rear of the stem and adjust the stem and
handlebar's angle to be in line with the front wheel.
Once aligned, retorque the rear stem bolts using the supplied torque wrench and 4 mm hex
bit to 5 Nm / 45 in-lbf.

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3.18
Fig. 3.18
WARNING! When adjusting the saddle height, the seatpost must be inserted
deep enough into the frame so the minimum insertion line is not visible.
Failure to follow the seatpost insertion requirement may result in damage to
the frame and/or seatpost, which could cause the rider to lose control and
fall.
3.17
Fig. 3.17
Check the height of the saddle by having the rider sit on it.
The ideal saddle position is for the rider to be able to touch the ground with the ball of the
foot while bending the knee slightly.
More pronounced knee bend or moderate space under the heels, while
acceptable, can result in less control of the bicycle. Experiment with the
saddle height until you find the position that works best for the rider. For
more fit recommendations, visit specialized.com/setupmyjett.

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A B
7
Nm
62in-lbf
5 mm
3.19
Fig. 3.19
Once the preferred height is determined, align the saddle with the centerline of the bicycle,
as shown in Fig. 3.19 A (Fig. 3.19 B shows an improperly aligned saddle).
Using the supplied torque wrench and 5 mm hex bit, torque the seat collar bolt to 7 Nm /
62 in-lbf).
INSTALLING THE PEDALS
RL
3.20
Fig. 3.20
Remove the pedals from their packaging and locate the “L” on the left pedal and the “R” on
the right pedal.
Remove the plastic insert protecting the pedal threads.
The left and right pedals have opposite threads. When tightening, both pedals will rotate
over the top and toward the front of the bicycle.

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ADJUSTING THE BRAKE LEVERS
The Jett has brake levers which can be adjusted for reach if the rider has small hands or finds
it difficult to squeeze the brake levers.
WARNING: Correctly adjusted brakes are critical for your safety. Brake adjustments
can be difficult to do correctly due to the multi-adjustment nature of the brakes. If
you are unfamiliar with adjusting rim brakes, they should be set up and/or adjusted
by your local Authorized Specialized Retailer.
AB C
3.22
Fig. 3.22
The hand brake is preadjusted at the factory. If needed, the brake-lever-reach can be
adjusted by turning the thumbwheels at the front of the brake lever (A, B).
When adjusting reach, be sure that the lever is not able to touch the grip when the brake is
applied (C).
Your Authorized Specialized Retailer should perform any necessary additional adjustments.
1/16th
0°
180°
90°
3.21
Fig. 3.21
Insert the right pedal into the right crank arm and use the 15 mm flat wrench to secure the
pedal in place (clockwise rotation).
Tighten the pedals 1/16 turn (Fig. 3.21.)
Repeat these steps for the left pedal on the left crank arm (counter-clockwise rotation).

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INSTALLING THE REFLECTORS
AB
3.23
Fig. 3.23
Using a Philips screwdriver, install the front (white) reflector on the handlebar (Fig. 3.23
A) and the rear (red) reflector on the seatpost (Fig. 3.23 B).
ADJUSTING THE CRANKS
Both the Jett 20 and 24 multi-speed models have adjustable cranks. The bicycle is assembled
with the pedals in the shorter position on the crank arm and can be adjusted to be made
longer.
15 mm
3.24
Fig. 3.24
Using the flat wrench, remove the pedal from the crank.

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REMOVING & REINSTALLING THE WHEELS
Your Jett bicycle is fitted with a front and rear bolt-on axle which attaches the wheels to the
bicycle. The following steps will guide you through the removal and installation of the wheels
for maintenance or repairs on both multi-speed and single-speed models.
WARNING! A correctly installed wheel is critical for the rider's safety. If you are
unfamiliar with removing (or installing) wheels, contact your Authorized Specialized
Retailer.
A
CB
3.26
Fig. 3.26
REMOVING THE FRONT WHEEL ON MULTI-SPEED MODELS
Disconnect the front brake cable by squeezing the brake arms (A) together and unhooking
the noodle end (B) from the quick release cradle (C).
R L
C
A
B
6 mm
3.25
Fig. 3.25
Using the 6 mm hex key, remove the crank arm plug (A) from the lower position (B) on the
crank.
Replace the crank arm plug in the upper position (C) on the crank and hand tighten using a
6 mm hex key (10 Nm / 88.5 in-lbf).
Reassemble the pedals (as in Fig. 3.21).

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A
B
3.27
Fig. 3.27
Using the flat wrench, loosen the front wheel axle nuts (A).
Guide the wheel down and out of the dropouts (B).
3/8th
0°
180°
90°
3.28
Fig. 3.28
REINSTALLING THE FRONT WHEEL ON MULTI-SPEED MODELS
Guide the wheel up and into the fork dropouts and between the brake pads.
Using the provided flat wrench, tighten the axle nuts approximately 3/8 of a turn after
tension is felt (21 Nm /186 in-lbf).
WARNING! Make sure the washers are on the outside of the dropouts when
you reinstall the wheel.