Britax Römer Kidfix I-Size Car Seat - Storm Grey

Compact width (without SICT) 44 cm
Weight 6.7 kg
Height range 100–150 cm
Reduced side impact forces (SICT) up to 40%
239,90€ 189,00€
In stockImmediate dispatch

Colour: Storm Grey (2)

Immediate delivery By order

Ref: 2000035121
The Britax Römer Kidfix i-Size was developed with what matters most in mind: your child's safety and comfort, together with parents' peace of mind. It's very likely the last car seat you'll need to buy.

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Why you should buy the Britax Römer Kidfix i-Size Car Seat

✅ The last car seat your child will need, from 3.5 to 12 years old
✅ Secure installation with ISOFIX or seat belt
✅ Developed with the highest European safety standards
✅ Advanced protection against frontal and side impacts
✅ Comfortable even on long journeys
Compact design ideal for families with more than one child

The Kidfix i-Size from Britax Römer was developed with what matters most in mind: your child's safety and comfort, combined with parents' peace of mind. This is, most likely, the last car seat you will need to buy.

Compatible with the i-Size system and approved according to the latest European standard UN R129, it accompanies the child's growth from 100 to 150 cm in height — that is, from approximately 3.5 years old to 12 years old.

It is an excellent choice for those looking for a safe, comfortable, and durable car seat that grows with your child and adapts to different cars, with simple installation via ISOFIX.

Review Britax Römer Kidfix i-Size Car Seat

https://youtu.be/mweAn3stYxc

Additionally, the headrest is height-adjustable, allowing the seat to accompany the child's growth, always ensuring adequate support.

The Britax Römer Kidfix i-Size Car Seat includes a redesigned and more ergonomic base, with soft foam and comfortable back support, for longer journeys without complaints. The structure was designed to allow air circulation, helping to regulate temperature and preventing your child from getting too hot during travels. The backrest with automatic recline easily adapts to the car seat, offering a more natural and relaxed position.

Installation is simple and quick: it can be done with ISOFIX for greater safety and stability, or only with the seat belt if your car is not compatible. And, thanks to its compact design (only 44 cm wide), it is possible to install up to three Kidfix i-Size seats side-by-side, ideal for families with more than one child.

This car seat includes three exclusive Britax Römer safety systems:

  • XP-PAD – Absorbs up to 30% of the force in frontal impacts, reducing the risk of neck injuries.
  • SecureGuard – A fourth seatbelt attachment point that helps keep the belt in the ideal position over the pelvic area, reducing the risk of abdominal injuries.
  • Adjustable SICT – Extra side protection that reduces impact forces by up to 40% in side collisions.

Installation with Isofix or seat belt

The Britax Römer Kidfix i-Size offers two installation options:
- Isofix and three-point belt
- Vehicle's three-point belt

Product specifications
With a width of 44 cm (without SICT), it is possible to place three seats in the back seats of many cars, especially those equipped with i-Size seats or with ISOFIX in all three seats.

Weight and dimensions
Dimensions: 63-83 x 44-48 (without SICT/with SICT) x 42 cm (height x width x depth)
Weight: 6.7 kg
Approval: UN ECE R129 (i-Size)

Instruction manual Britax Römer Kidfix i-Size Car Seat

Britax Römer_KIDFIX i-SIZE_user guide_web_pt

Why order from us at Bonabebe ❤
  • With us, you will receive specialized human support before, during, and after purchase
  • Child road safety techniques
  • Safest products on the European market for babies
  • Babywearing consultants
  • Local business
  • Women-owned
  • LGBTQ+ friendly
ApprovalUN ECE R129 (i-Size)
Agefrom 3.5 to 12 years (approx.)
Height100 to 150 cm
InstallationISOFIX or 3-point belt
Dimensions63-83 x 44-48 (without SICT/with SICT) x 42 cm (height x width x depth)
Width44 cm (without SICT)
Weight6.7 kg
239,90€ 189,00€

Highlights and features of Britax Römer Kidfix I-Size Car Seat - Storm Grey

Britax Römer Cadeira Auto Kidfix I-Size - Cosmos Black

Three exclusive safety systems

Includes the XP-PAD, which absorbs up to 30% of the force in frontal impacts, reducing the risk of neck injuries. SecureGuard adds a fourth belt anchor point, keeping it in the ideal position over the pelvic area. The adjustable SICT provides extra side protection, reducing impact forces by up to 40% in side collisions.

Britax Römer Cadeira Auto Kidfix I-Size - Cosmos Black

Compact design for three seats side by side

At just 44 cm wide (without SICT), it's possible to fit up to three Kidfix i-Size seats side by side. It's ideal for families with more than one child, especially in cars with i-Size or ISOFIX fittings across all three seats.

Britax Römer Cadeira Auto Kidfix I-Size - Cosmos Black

Installation with ISOFIX or seat belt

Installation is simple and quick. It can be done with Isofix for greater safety and stability, or with just the vehicle's 3-point seat belt, if your car isn't compatible with Isofix.

Britax Römer Cadeira Auto Kidfix I-Size - Cosmos Black

Height-adjustable headrest

The headrest is height-adjustable, allowing the seat to grow with the child. It always ensures proper support throughout the years of use.

Britax Römer Cadeira Auto Kidfix I-Size - Cosmos Black

Comfort on long journeys

Includes a redesigned, more ergonomic base, with soft foam and comfortable back support. The structure allows air to circulate, helping to regulate temperature, and the automatically reclining backrest adapts easily to the car seat.

Why you'll love it

Installation with seat belt or Isofix
Installation with seat belt or Isofix
Extra side protection (SIP/LSP)
Extra side protection (SIP/LSP)
Adjustable headrest
Adjustable headrest
Extra-tall backrest
Extra-tall backrest
Compact
Compact

See in video

Certifications and approvals

UN ECE R129 (i-Size)

A car seat approved to the latest European UN R129 regulation, growing with the child from 100 to 150 cm tall.

i-Size

A car seat approved to the i-Size (UN R129) regulation, which ensures high safety standards and an installation suited to the child's height and age.

Frequently asked questions about Britax Römer Kidfix I-Size Car Seat - Storm Grey

What ages and heights is the Kidfix i-Size suited to?

It grows with the child from 100 to 150 cm tall, that is, from around 3.5 to 12 years old.

How is the seat fitted?

It can be installed with ISOFIX and a 3-point belt, for greater safety and stability, or using just the vehicle's 3-point belt if the car isn't ISOFIX-compatible.

Can three car seats be installed side by side?

Yes. Thanks to its compact design, just 44 cm wide (without SICT), you can fit up to three Kidfix i-Size seats side by side, especially in cars with i-Size seats or Isofix in all three positions.

What safety systems does it include?

Includes three exclusive Britax Römer systems: XP-PAD (absorbs up to 30% of the force in frontal impacts), SecureGuard (fourth belt anchor point in the pelvic area) and adjustable SICT (reduces impact forces by up to 40% in side collisions).

What's the seat's weight and approval?

The seat weighs 6.7 kg and is approved under the UN ECE R129 (i-Size) regulation.

Is the headrest adjustable?

Yes, the headrest is height-adjustable, keeping up with your child's growth and always ensuring proper support.