CYBEX Base G3 i-Size Car Seat Base

The CYBEX Base G3 i-Size is the dependable, cleverly engineered car seat base that transforms daily installation from a frustrating chore into a quick, confident routine. Built for families who refuse to compromise on safety or convenience, this base works tirelessly in the background so you can focus on what matters most.

One Base, Remarkable Versatility

Compatible with four car seats — the Cloud G3, Sirona G3, Cloud G i-Size, and Sirona G i-Size — the Base G3 supports your child from the newborn stage right through to their next car seat milestone. Rather than purchasing multiple bases as your family’s needs change, this single solution offers genuine long-term value, whether you’re switching between seats or sharing the base across two compatible models.

Straightforward, Satisfying Installation

Fitting a car seat base should be simple, and with the Base G3 it truly is. Intuitive ISOFIX-Release buttons click firmly into place, giving you instant reassurance that the base is correctly secured. A height-adjustable load leg anchors the base to your vehicle floor for additional stability, adding an extra layer of confidence every time you set off.

Safety Built Into Every Detail

The Driving Direction Control (D.D.C.) feature ensures the Cloud G3 can only be attached in the rear-facing position — the safest orientation for infants. When you move on to the Sirona G3, two further settings allow you to choose between rear-facing and forward-facing travel as your child grows, keeping safety at the forefront at every stage.

Effortless Boarding and Off-Boarding

Getting a tired baby in and out of a car seat is one of the trickier aspects of early parenthood. The Base G3’s 360° rotation system addresses this directly — a single pull of the rotation handle swings the seat smoothly towards the car door, so you can settle your child in or lift them out without any awkward reaching or back strain. The seat releases as it rotates, making even the most hectic school-run mornings that little bit more manageable.

Key Features

• Compatible with four seats — Cloud G3, Sirona G3, Cloud G i-Size and Sirona G i-Size
• 360° rotation system — smooth, door-facing boarding and off-boarding with a single pull
• ISOFIX-Release buttons — secure, simple installation every time
• Height-adjustable load leg — additional stability and reassurance
• Driving Direction Control (D.D.C.) — guarantees correct rear-facing use with the Cloud G3
• Forward and rear-facing settings — adaptable for use with the Sirona G3
• UN R129/04 i-Size certified — compliant with the latest European safety regulations
• Part of the CYBEX G3 Modular System — designed to work seamlessly within the full ecosystem
• Base only — car seats sold separately

Product Specifications

• Safety Standard: UN R129/04 i-Size
• Product Weight: 7.0 kg
• Installation: ISOFIX with height-adjustable load leg
• Rotation: 360°
• Compatible Seats: Cloud G3, Sirona G3, Cloud G i-Size, Sirona G i-Size
• Driving Direction: Rear-facing (Cloud G3); rear-facing and forward-facing (Sirona G3)

What’s in the Box

• CYBEX Base G3 i-Size x1

The Reliable Foundation Your Family Deserves

The CYBEX Base G3 i-Size proves that safety and everyday convenience can go hand in hand. With broad seat compatibility, intuitive installation, and a 360° rotation system that takes the effort out of every journey, this is a base that earns its place in your vehicle from day one and continues to deliver as your child grows.