Alpinestars Stella Tech-Air 3 User manual

v. 1.1
USER GUIDE
IMPORTANT - READ THIS MANUAL
CRITICAL SAFETY INFORMATION INSIDE

Please read the following important WARNING and
LIMITATION of use notice carefully:
Motorcycling is an inherently dangerous activity and an ultra-hazardous
sport, which may result in serious personal injury, including death.
Each individual motorcycle rider must be familiar with motorcycling,
recognize the wide range of foreseeable hazards and decide whether
to assume the risks inherent in such an activity with the knowledge of
the dangers involved and accept any and all risks of injury, including
death. While all motorcycle riders should utilize appropriate protective
equipment, each rider should exercise extreme care for safety while
riding and understand that no product can offer complete protection
from injury including death or damage to individuals and property in
case of fall, collision, impact, loss of control or otherwise. Riders should
ensure that safety products are correctly fitted and used. DO NOT use
any product that is worn out, modified or damaged.
Alpinestars makes no guarantees or representations, express or
implied, regarding the fitness of its products for any particular
purpose.
Alpinestars makes no guarantees or representations, express
or implied, regarding the extent to which its products protect
individuals or property from injury, death or damage.
ALPINESTARS DISCLAIMS ANY RESPONSIBILITY FOR INJURIES
INCURRED WHILE WEARING ANY OF ITS PRODUCTS.

7EN6EN
0. Preliminary Notes 7
1. Introduction 7
2. Principles of Operation 9
3. Tech-Air® Envelope of Protection 10
4. Limitations of Use 16
5. System Overview 18
6. Sizing 19
7. Health and Age Restrictions 24
8. Compatible Garment 25
9. System Installation and Fitting 27
10. Transportation of Objects and Use of the Pockets 28
11. Battery Charging 29
12. System Operation 30
13. LED Display Indications 34
14. Cleaning, Storage and Transportation 36
15. Maintenance, Servicing, Lifespan and Disposal 41
16. Actions in the Event of an Accident 43
17. Tech-Air® App 45
18. Troubleshooting 50
19. Tech-Air® Support 53
20. Certification Information 53
21. Important Information for Users WARNING! 63
Table of Contents 0. Preliminary Notes
In this manual the following four presentation styles are used to provide information:
Provides critical information which, if not followed, may cause injury,
death, System malfunction or non-function, and/or an exaggerated
expectation of the Tech-Air® 3 System’s abilities.
WARNING!
Provides useful advice regarding the Tech-Air® 3 System.
IMPORTANT! Provides important information regarding the limitations of the System.
Tip:
Provides information related to Tech-Air® App optional functionalities.
1. Introduction
Dear User, thank you for choosing an Alpinestars Product!
The Tech-Air® 3 System (hereinafter referred to as “System” and/or “Tech-Air® 3 System”) is
an active safety system for sport and recreational motorcycling, which offers protection to a
motorcycle user both as a rider or passenger. In the event of an accident or other triggering
event, the System provides protection to the upper body as it covers the user’s chest and
full back. The System is designed to function in both road riding and light off-road riding
situations (subject to the Off-Road limitations indicated in Section 3 below).
The Tech-Air® 3 System consists of a standalone Airbag System, contained within a
vest, which is designed to provide additional protection from impacts occurring during
a motorcycle accident, to motorcycle users both as riders or passenger. The System is
specifically designed to be worn over standard motorcycling gear, as it is able to guarantee
protection, within the coverage area, against impact and possible abrasion during an
accident.

9EN8EN
The Tech-Air® 3 System does not offer the Dual Charge Concept.
Once the airbag has deployed there is no additional airbag charge.
This means that the User of the System is without further airbag
protection until the System is serviced, and the airbag inflator is
replaced.
The System, including its components, are technologically advanced
pieces of motorcycling safety equipment and should not be treated
like a normal motorcycle garment. Similar to one’s motorcycle,
the System and its components must be cared for, serviced and
maintained, so that they may function correctly.
Although the Tech-Air® 3 System is abrasion resistant certified, it
is highly recommended to use it in combination with an additional
protective garment, compatible with the System (see Section 8
“Compatible Garment”).
WARNING!
WARNING!
WARNING!
It is essential to read this user manual carefully, to understand it
completely and to follow the advice and warnings illustrated in this
user manual. If you have any questions regarding the equipment,
contact Tech-Air® Support (see Section 19 “Tech-Air® Support”).
WARNING!
IMPORTANT! Without any additional notice, Alpinestars reserves all rights to, from time
to time, update the software and/or the electronic components of the Tech-
Air® 3 System.
2. Principles of Operation
The System consists of a vest with an integrated Airbag Electronic Control Unit (with built-in
sensors) and a LED Display (Figure 1). The Airbag Electronic Control Unit contains 1 triaxial
accelerometer and 1 triaxial gyroscope (also referred to as a sensor cluster). These sensors
monitor the user’s body for shocks or unexpected movements. In the event the user’s body
is subject to a high and/or sudden amount of energy, the System will deploy. This may occur
when the motorcycle is involved in an accident, such as when the motorcycle collides with
another vehicle or with an obstacle, when the rider loses control or when the rider falls off
the motorcycle.
The System is equipped with a Bluetooth Low Energy (BLE) device located in the Electronic
Control Unit (ECU). The BLE allows the System to connect directly to a mobile phone in
order to receive important information from the System, while also permitting the users to
access a number of other functions (for further information see “Tech-Air® App” in Section
17 “Tech-Air® App”). The System does NOT need to be connected to the Tech-Air® App to
work, it functions independently of the Tech-Air® App.
Figure 1 – Sensor Location
To connect the System to the mobile phone via Bluetooth, remember to
activate the Bluetooth module within your phone and to download the Tech-
Air® App available at the Google Play Store or at the Apple Store.
CHASSISNUMBER:
0000000
L
Sensor
ECU
Figure 1
(Front)
Sensor
(Back)

11 EN10 EN
The Tech-Air® 3 System comes with the “Street Mode” that permits the use of the System
on streets, as well as on light off-road paths. Users can easily check to have the Street Mode
correctly installed in their Systems by verifying with the Tech-Air® App.
User must always ensure via the App that the System is running the most up
to date software release.
Figure 2: Area of Airbag coverage
No product can provide complete protection from injury (or death),
or damage to persons or property in the event of a fall, accident,
collision, impact, loss of control or other event.
WARNING!
The System provides impact protection, on the areas shown in Figure 2, to the user (both as
rider and as a passenger) wearing the System in the event of an accident or other triggering
events. Note that there are limitations to the protection it can provide as explained later in
this user manual (see Section 3.2 and Section 4 “Limitations of Use”).
CHASSISNUMBER:
0000000
L
AREA OF AIRBAG COVERAGE
FRONT BACK
CHASSISNUMBER:
0000000
L
AREA OF AIRBAG COVERAGE
FRONT BACK
(Front) (Back)
3. Tech-Air® Envelope of Protection
The “Envelope of Protection” is a term used to generally describe situations and/or
circumstances where the System may provide protection, denoted as “inside the Envelope”,
and those where it will not, denoted as “outside the Envelope”.
Area of airbag
coverage
For the Tech-Air® 3 System the Envelope of Protection includes crashes against obstacles
and loss of control crashes (commonly referred to as ‘low-side’ and ‘high-side’ crashes).
In the Street Mode, the Envelope of Protection also include situations in which the rider’s
motorcycle whilst stationary, is hit by another vehicle.
Table 1 summarizes the Envelope of Protection for the Street Mode.
The System provides only limited impact protection against forces in
the areas of Airbag coverage as depicted in Figure 2. No guarantee is
given that the System will prevent injuries (including severe or fatal
injuries) inside and/or outside the areas of Airbag coverage or the
Envelope of Protection.
The System cannot prevent accidents to the user.
No protective device, including the System, can provide protection
against all possible sources of injury and therefore cannot provide
complete protection against injuries.
Wearing the System is not a substitute for wearing other protective
motorcycling clothing and gear. To provide full potential protection,
the System must always be worn in conjunction with suitable
motorcycling gear and apparel that covers the rider from head to toe,
including a helmet, protectors, boots, gloves, and other appropriate
protective equipment.
WARNING!
WARNING!
WARNING!
WARNING!
IMPORTANT! Unless explicitly stated, in this manual the ‘contact’ and/or the ‘impact’ of
the user with other objects must always be referred to as the covered areas
of the body.

13 EN12 EN
Table 1: Summary of the Envelope of Protection for Street Mode.
CrashesLoss Of Control
Incident Type Street Mode
Crashes
against
Obstacles
✔
Stationary
Crashes ✔
Low-Side
Crashes ✔
High-Side
Crashes ✔
3.1 Envelope of Protection for STREET MODE
3.1.1 Envelope of Protection for Crashes against Obstacles
In Street Mode, the Tech-Air® 3 System is active only when the System Check is passed
(see Section 12 “System Operation”) and after having started riding for approximately 10
seconds. Once activated, the System remains active even if the rider stops, and until the
System is manually switched off, to offer protection also in a stationary condition, when
the motorcycle is hit by a vehicle as described in the Envelope of Protection conditions (see
Section 3.1.2).
As summarized in Table 1, in Street Mode the Envelope of Protection includes:
- Crashes against Obstacles
- Stationary Crashes
- Low-Side Crashes
- High-Side Crashes
Tech-Air® 3 System is expected to inflate and protect before the user’s covered body areas
contact an obstacle, in Crashes Where a Motorcycle Strikes a Vehicle or Obstacle (Figure 3)
according to the following conditions:
Table 2: crash conditions
Relative Arrival Speed From 25km/h (15mph)
to 50km/h (31mph)
Impact Angle (Fig 3) From 45° to 135°
The above parameters are valid for both the rider and passenger.
50km/h
45°
45°
Figure 3

15 EN14 EN
Vehicle Arrival Speed From 25km/h (15mph)
Impact Angle From 45° to 135°, rear/front
3.1.2 Envelope of Protection for Stationary Crashes
In Street Mode, the Tech-Air® 3 System is tested to activate in Crashes Where a Vehicle
Strikes a Stationary Motorcycle (Figure 4) according to the following conditions:
The above parameters are valid for both the rider and passenger.
Outside the conditions of Table 2, the System may not deploy before
the first impact, but may deploy if the rider suddenly falls from the
motorcycle after the impact, regardless of the impact angle.
WARNING!
IMPORTANT! Figure 3 outlines the Envelope of Protection where the Tech-Air® 3 System
is expected to inflate before the user’s body covered areas contact an
obstacle. At speeds above 50km/h (31 mph) or outside the declared angle,
the System is expected to deploy as well, however, outside the Envelope
of Protection the System may not be fully inflated before there is contact
between the obstacle and the user’s covered areas.
Figure 4
50km/h
45°
45°
Table 3: crash conditions
During Loss of Control Crashes, and in particular, in Low-Side Crashes,
the System may not deploy before the first impact with the ground,
but may deploy during the following sliding phase, if present.
If the crash conditions are outside the Envelopes of Protection
described above, the System may not deploy if the acceleration and
angular speed measured by the System are not sufficient to activate
the Tech-Air® 3 System.
The user does not need to be involved in a crash for the System to
deploy. For example, the System will deploy if the user falls while
wearing the System, such as when dismounting from the motorcycle.
These types of “non-riding” deployments are not failures of the
System.
WARNING!
WARNING!
WARNING!
IMPORTANT! If the (relative) speed between the Motorcycle and the vehicle or obstacle
during the impact is less than 25km/h (15 mph), the System may not deploy
at the time of the collision/crash, but may deploy if the rider or passenger
suddenly falls from the motorcycle after the impact.
3.1.3 Envelope of Protection for Loss of Control Crashes
3.2 Envelopes of Protection: Limitation of use
A Loss of Control Crash (Low-Side and High-Side Crashes) often results in the motorcycle
falling over during riding, without necessarily being involved in a crash with other vehicles
or obstacles. This commonly happens when tire grip on the roadway is lost during a turn
or heavy braking.
There are some limitations to the deployment of Tech-Air® 3 System even inside the
Envelopes of Protection, when, in general, the environmental conditions prevent the
System from measuring acceleration and/or angular speed sufficient to activate the System.

17 EN16 EN
Motorcycle Type
The Tech-Air® 3 System can be utilized by riders or passengers on any type of motorcycle,
including electric motorcycles.
IMPORTANT! The chances of falling off a motorcycle are notably higher when riding off-
road, particularly when a rider is inexperienced. Even when stopped, a fall
may cause the System to deploy, leaving the user without protection until
the System is returned and recharged (see Section 16 “Actions in the Event
of an Accident”).
Light Off-Road Riding
The Tech-Air® 3 System be used off-road IN A LIMITED CAPACITY riding on gravel roads only.
For the purpose of using the System off-road, the definition of a gravel road is:
• An unpaved road surfaced with gravel.
• Has a minimum width of 4m (13ft).
• Has no gradients +/-30%.
• Has no ruts, steps, or holes greater than 50cm (19.5”) in depth.
The Tech-Air® App permits the user to temporarily disable the System
protection if, for instance, the user is undertaking heavy off-road riding.
The System cannot be turned on again with the App, but only by means of
opening and closing again the Activation Zip (1).
Since the System is sensitive to sudden body movements and shocks,
the System is to be used ONLY for motorcycling within the conditions
and limitations delineated above. The System is NOT for use in:
a. Any racing or competitive events;
b. Enduro, Motocross, or Supermoto events;
c. Motorcycle stunts; or
d. Side skidding, wheelies, etc.;
e. ANY non-motorcycling activities.
WARNING!
4. Limitations of Use
Due to shocks, movement and/or other input detected and/or
received by the System while in use, although unlikely, the System
may deploy even though there is no crash event.
WARNING!
Depending on the motorcycle type for example a scooter or trials
bike, it cannot be guaranteed that the System will inflate before the
user collides with parts of the motorcycle, or other objects.
Wearing the System is not a substitute for wearing other protective
motorcycling clothing and gear. To offer full potential protection
the System must always be worn in conjunction with suitable
motorcycling gear and apparel that covers the rider from head to
toe, including a helmet, protectors, boots, gloves, jacket, and other
appropriate protective equipment.
WARNING!
WARNING!
The System’s working temperature is between -20° and +50° (-4°F
to 122°F).
Do not use the System 4,000 meters above sea level as low pressure
may not guarantee a correct level of protection for the System.
WARNING!
WARNING!

19 EN18 EN
5. System Overview
The diagrams below illustrate the different parts of the Tech-Air® 3 System. The numbered
parts are used to guide you through this user manual.
TECH-AIR® 3 SYSTEM
1. Activation Zip
2. LED Display
3. Electronic Control Unit
4. Inflator Housing
5. Elastic band
Figure 5
CHASSISNUMBER:
0000000
L
1
2
3
4
5
BACKFRONT
Figure 5
(Front) (Back)
1
2
5
4
3
6. Type C USB Recharge Port
7. Type C USB Adapter
8. Magnetic Charging Cable
Figure 6
AIRBAG ELECTRONIC CONTROL UNIT
HOW TO ACCESS THE RECHARGE PORT
Figure 6
6. Sizing
The System is available in sizes ranging from XS to 4XL. In addition, a
women’s STELLA version specifically designed for use by female riders is
available in sizes ranging from XS to XXL.
Each size is characterized by a specific waist-to-shoulder length of the
user (Figure 7). Waist to Shoulder length (WSL) is an important parameter
for the choice of the right size of back protector: the user should always
be sure to use a protector with a WSL that match his/her measurement. Figure 7

21 EN20 EN
Refer to Section 20 (Certification Information) for the details on the WSL for each Tech-
Air® 3 size.
It is imperative that the System is fitted correctly, in order to provide the maximum potential
protection in the event of an accident. To help with the choice of the right size, the user
may refer to Table 4a and Table 4b below, that provides the reference measurements of
the body for each system’s size. When used as an outer garment, once worn, be sure that
the lateral elastic panels are not stretched and fit correctly, otherwise they may not work
properly during the Airbag inflation.
SIZE XXS XS S M L XL XXL 3XL 4XL
A. CHEST
(CM) 78 83.5 83.5 89 89 94.5 94.5 100 100 105.5 105.5 111 111 116.5 116.5 122 122 127.5
B. WAIST
(CM) 63 69 69 75 75 81 81 87 87 92 92 97 97 102 102 107 107 112
F. OUTER
ARM
(CM)
49 51 51.5 53.5 54.5 56.5 57.5 59 60 62 63 65 66 68 66 68 68 70
G.
HEIGHT
(CM)
157 162 163 168 169 174 175 179 180 184 185 189 190 194 190 194 195 199
A. CHEST
(IN) 30 3/4 32 7/8 32 7/8 35 35 37 1/4 37 1/4 39 3/8 39 3/8 41 1/2 41 1/2 43 3/4 43 3/4 45 7/8 45 7/8 48 48 50 1/4
B. WAIST
(IN) 24 3/4 27 1/8 27 1/8 29 1/2 29 1/2 31 7/8 31 7/8 34 1/4 34 1/4 36 1/4 36 1/4 38 1/4 38 1/4 40 1/8 40 1/8 42 1/8 42 1/8 44 1/8
F. OUTER
ARM
(IN)
19 1/4 20 1/8 20 1/4 21 21 1/2 22 1/4 22 5/8 23 1/4 23 5/8 24 3/8 24 3/4 25 5/8 26 26 3/4 26 26 3/4 26 3/4 27 1/2
G.
HEIGHT
(IN)
61 3/4 63 3/4 64 1/8 66 1/8 66 1/2 68 1/2 68 7/8 70 1/2 70 7/8 72 1/2 72 7/8 74 3/8 74 3/4 76 3/8 74 3/4 76 3/8 76 3/4 78 3/8
MEN’S SIZE GUIDES TECHAIR® 3
Table 4a
HOW TO MEASURE MEN’S
A. Chest
Measure around the fullest part, under the
armpits, keeping the tape horizontal.
B. Waist
Measure around the natural waist line, inline
with the navel, keeping the tape
horizontal.
C. Hip
Measure around the fullest part of your hips,
about 20cm below waist line, keeping the tape
horizontal.
D. Thigh
Measure around the thigh just below the
crotch, keeping the tape horizontal.
E. Inner Leg
Stand against a wall, ask someone else to
measure from the crotch to the bottom of
your leg.
F. Outer Arm
Measure from shoulder (Humerus) to wrist.
G. Height
Stand against a wall, ask someone else to
measure from the floor to the top of your
head, keeping the tape vertical.
G
H
F
G
A
B
C
D
E
F
A
B
C
D
E