Cybex Sirona Gi i-Size Plus + Newborn Inlay - Stone Grey

Rotation 360°
Maximum weight Up to 20 kg
Child's height 40 – 105 cm
Safer rear-facing 5x
359,95€ 305,96€

Price in the last 30 days: 359,95€

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Colour: Stone Grey (2)

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Ref: 524001757
The Cybex Sirona Gi i-Size + Newborn Insert is a from-birth car seat from the Cybex Gold range, with 360° rotation and advanced side impact protection. A premium choice designed for everyday safety, comfort and practicality.

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Why you should buy the Cybex Sirona Gi i-Size + Stone Grey Reducer

The Sirona Gi i-Size + Reducer is a state-of-the-art car seat from birth, part of the Cybex Gold range, designed to offer maximum car safety, comfort, and everyday practicality. With 360° rotation, an advanced side protection system, and compliance with the i-Size (UN R129) standard, this car seat stands out as a premium choice for discerning parents.

In this description, we explore all the features, advantages, and specifications of the Sirona Gi i-Size + Reducer, focusing on important details.

ADAC Awards and International Recognition

The Sirona Gi i-Size is part of the renowned Cybex Gold line, a synonym for German quality (engineered in Germany) and constant innovation. This model has been distinguished with ADAC awards and positive evaluations from Stiftung Warentest — two of the most rigorous European organizations in child safety testing.

✔ Tests based on demanding criteria (including ADAC 2022)
✔ High levels of protection in frontal and side impact
✔ Up to 50% safer in rear-facing position

These recognitions reinforce confidence in this car seat as a top-tier solution in child road safety.

Advanced Safety in the Sirona Gi i-Size + Reducer Rear-facing up to 20 kg

The rear-facing position is crucial to reduce the forces exerted on the child's neck in the event of a frontal collision.

  • Mandatory up to 15 months (76 cm)
  • Extended use up to 20 kg
  • Significant risk reduction in frontal impact
  • Ideal up to around 4 years

This configuration keeps the child protected during one of the most critical developmental stages, being 5 times safer.

Linear Side-impact Protection (L.S.P.)

The integrated Linear Side-impact Protection (L.S.P.) offers an additional layer of safety in the event of a side impact.

  • Effective absorption of impact energy
  • Head, shoulder, and torso protection
  • Reinforced structure with progressive absorption

An essential element to reinforce side protection and minimize risks.

360° Rotation: Total Everyday Practicality

The 360° rotation feature completely transforms the user experience.

  • Allows turning the seat towards the door
  • Facilitates child entry and exit
  • Reduces strain on parents' backs
  • Simple switching between positions

The rotating car seat is ideal for daily use, making every journey quicker and more comfortable.

Ventilation for Maximum Comfort

The ventilation ensures excellent air circulation within the car seat.

  • Integrated air channel system
  • Reduction of accumulated heat
  • Thermal comfort in all seasons
Plus Version:
  • Breathable mesh fabric
  • Up to 6x more ventilation
  • Ideal for hot climates

Perfect for keeping the baby comfortable even on long journeys.

Adaptable Growth and Ergonomics

The Cybex Sirona Gi i-Size accompanies the child's growth from the first months up to around 4 years.

  • Adjustable headrest
  • Multiple recline positions
  • Newborn reducer (optional, sold separately)
  • Continuous ergonomic adjustment

A car seat designed to evolve with your child.

How to use the Sirona Gi i-Size + Stone Grey Reducer

https://www.youtube.com/watch?v=5O3jvCdv4f0

Technical specifications Details Model Cybex Sirona Gi i-Size Safety Standard UN R129/03 (i-Size) Child Height 40 – 105 cm Maximum Weight Up to 20 kg Recommended Age From 0 months up to approximately 4 years Travel Position Rear-facing (up to 20 kg) and forward-facing (min. 15 months) Rotation System 360° Rotation Installation ISOFIX with integrated base Safety System Linear Side-impact Protection (L.S.P.) Recline Multiple adjustable positions Headrest Height-adjustable Ventilation All-around ventilation (Plus version with breathable fabric) Compatibility Compatible with most ISOFIX-equipped vehicles Compatible Accessories Newborn reducer, summer cover, SensorSafe, cup holder Instruction manual

download

Frequently Asked Questions Cybex Sirona Gi i-Size + Stone Grey Reducer



What is the recommended age for the Sirona Gi i-Size + Reducer?


From 0 months up to approximately 4 years (40 to 105 cm, up to 20 kg).




Does the Sirona Gi i-Size + Reducer car seat include accessories?


Yes, it includes the newborn reducer, making the Sirona Gi i-Size suitable from birth.




Can the car seat be used forward-facing?


Yes, but only after 15 months and 76 cm. The rear-facing position is always safer.




How does the 360° rotation work?


It allows the car seat to rotate completely to facilitate child access and switch between positions.




Does ventilation really make a difference?


Yes. All-around ventilation significantly improves thermal comfort, especially in the Plus version.




Does the car seat have good safety ratings?


Yes. It has received ADAC awards and complies with the i-Size UN R129 standard, ensuring high safety standards.






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Why order the Cybex Sirona Gi i-Size + Stone Grey Reducer from Bonabebe ❤

  • With us, you will have specialized human support before, during, and after your purchase
  • Child road safety techniques
  • Safest products on the European market for babies
  • Babywearing consultants
  • Local business
  • Women-owned
  • LGBTQ+ friendly
ModelCybex Sirona Gi i-Size
Safety standardUN R129/03 (i-Size)
Child height40 – 105 cm
Maximum weightUp to 20 kg
Recommended ageFrom 0 months to approximately 4 years
Travel positionRear-facing (up to 20 kg) and forward-facing (min. 15 months)
Rotation system360° rotation
InstallationISOFIX with integrated base
Safety systemLinear Side-impact Protection (L.S.P.)
ReclineMultiple adjustable positions
HeadrestHeight-adjustable
VentilationAll-round ventilation (Plus version with breathable fabric)
CompatibilityCompatible with most ISOFIX vehicles
Compatible accessoriesNewborn insert, summer cover, SensorSafe, cup holder
  • Newborn insert
359,95€ 305,96€

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Highlights and features of Cybex Sirona Gi i-Size Plus + Newborn Inlay - Stone Grey

Cybex Sirona Gi i-Size Plus + Redutor - Stone Grey

Rear-facing up to 20 kg

The rear-facing position reduces the forces on a child's neck in the event of a frontal collision. It's mandatory up to 15 months (76 cm) and can be kept up to 20 kg, around 4 years old. In this configuration, the child is 5 times better protected.

Cybex Cadeira Auto Sirona G3 i-Size - Almond Beige

Linear Side-impact Protection (L.S.P.)

The built-in Linear Side-impact Protection (L.S.P.) offers an extra layer of safety in the event of a side impact. It effectively absorbs impact energy and protects the head, shoulders and torso, through a reinforced structure with progressive absorption.

Cybex Cadeira Auto Sirona G3 i-Size - Almond Beige

360° rotation

The 360° rotation function lets you turn the seat towards the door, making it easier for your child to get in and out. It reduces strain on parents' backs and makes it simple to switch between positions, making every journey quicker and more comfortable.

Cybex Cadeira Auto Sirona G3 i-Size - Almond Beige

Ventilation for maximum comfort

A system of integrated air channels ensures good airflow inside the seat and reduces heat build-up, for thermal comfort in every season. The Plus version uses breathable mesh fabric, with up to 6x more ventilation, ideal for warm climates.

Cybex Cadeira Auto Sirona G3 i-Size - Almond Beige

Adaptable growth and ergonomics

The seat grows with your child from the early months to around 4 years. It has a height-adjustable headrest and several recline positions, ensuring continuous ergonomic adjustment as your baby grows.

Why you'll love it

360° rotation
360° rotation
Rear-facing
Rear-facing
Isofix installation
Isofix installation
Use up to 105 cm
Use up to 105 cm
Side impact protection
Side impact protection

See in video

Certifications and approvals

i-Size (UN R129/03)

i-Size approval ensuring high safety standards, with mandatory rear-facing installation up to 15 months and protection for the head, neck and spine.

ADAC Awards

Recognised with ADAC awards, one of the most rigorous European bodies for child safety testing, based on demanding criteria (including ADAC 2022).

Stiftung Warentest

It received positive ratings from Stiftung Warentest, another leading European safety testing body.

Frequently asked questions about Cybex Sirona Gi i-Size Plus + Newborn Inlay - Stone Grey

What's the recommended age for the Sirona Gi i-Size + Insert?

From 0 months up to around 4 years (40 to 105 cm, up to 20 kg).

Does the Sirona Gi i-Size + Newborn Insert include accessories?

Yes, it includes the newborn insert, making the Sirona Gi i-Size suitable from birth.

Can the seat be used facing forward?

Yes, but only after 15 months and 76 cm. The rear-facing position is always safer.

How does the 360° rotation work?

It lets you fully rotate the seat, making it easier to reach the child and switch between positions.

Does the ventilation really make a difference?

Yes. All-round ventilation significantly improves thermal comfort, especially in the Plus version.

Does the seat have good safety ratings?

Yes. It has received ADAC awards and complies with the i-Size UN R129 regulation, ensuring high safety standards.