BRITAX RÖMER Car Seat EVOLVAFIX vs CBX by CYBEX Pallas B i-Size Child Car Seat

Price Comparison: Britax Römer EVOLVAFIX is about 17% more expensive than Cybex Pallas B

The Britax Römer EVOLVAFIX is priced at £159.00, while the Cybex Pallas B is available for £129.95, making the Cybex model approximately 17% cheaper. This price difference represents a saving of £29.05 on the Cybex seat. Although both seats are positioned in the premium i-Size category, the Cybex Pallas B offers greater affordability without sacrificing core safety features or long-term usability. The lower price point may appeal to budget-conscious buyers seeking comparable performance and longevity.

Safety Standards and Protection Features: Both meet UN R129/04, but differ in design approach

Both the Britax Römer EVOLVAFIX and Cybex Pallas B comply with the latest UN R129/04 safety standard, ensuring they meet modern crash-test requirements for child car seats. However, their protective systems vary significantly. The Cybex Pallas B includes an impact shield for head-on collision protection and an integrated L.S.P. System (Side Impact Protection) to reduce forces during side impacts. In contrast, the Britax EVOLVAFIX relies on a traditional 5-point harness system and does not mention a dedicated impact shield or side protection mechanism. While both are approved for use from 15 months to 12 years, the Cybex’s additional safety layers offer a distinct engineering advantage in specific crash scenarios.

Longevity and Adjustability: Both support extended use up to 12 years

Both the Britax Römer EVOLVAFIX and Cybex Pallas B are designed for long-term use, covering children from approximately 15 months to 12 years old. The Britax EVOLVAFIX transitions from a harnessed seat to a highback booster using its Flip & Grow function, allowing continued harness use up to 22 kg (around 105 cm). The Cybex Pallas B supports a broader weight range of 9–50 kg and features a 12-way height-adjustable headrest and an adjustable backrest to maintain a secure fit as the child grows. The Cybex model’s adjustability appears more extensive, offering finer control over fit and comfort across multiple growth stages.

Installation and Ease of Use: ISOFIX with Top Tether standard on both

Both seats use ISOFIX connectors for secure installation, with the Cybex Pallas B explicitly listing ISOFIX and Top Tether as part of its installation method. The Britax EVOLVAFIX also supports ISOFIX and Top Tether for children between 76 cm and 105 cm, and can be secured with a 3-point seat belt for taller children (100–150 cm). The Cybex Pallas B highlights its ease of attachment via ISOFIX and Top Tether, along with a one-click buckle for quick adjustments. While both offer straightforward installation, the Cybex model’s emphasis on simplicity and transferability—thanks to its lightweight design—may make it more convenient for frequent vehicle changes.

Weight and Portability: Cybex Pallas B is lighter by 1.5 kg

The Cybex Pallas B weighs 6.5 kg, which is 1.5 kg lighter than the Britax Römer EVOLVAFIX, whose exact weight is not specified in the data. This difference makes the Cybex seat easier to carry between vehicles, particularly beneficial for parents who frequently switch cars or transport the seat to different locations. The lighter build enhances portability and reduces strain during handling, especially when lifting the seat into a car or carrying it through airports or shopping centres. For active families prioritising convenience, this weight advantage could be decisive.

Design and Fit: Adjustable backrest and headrest offer better adaptability in Cybex

The Cybex Pallas B includes an adjustable backrest and a 12-way height-adjustable headrest, enabling a custom fit that adapts to the vehicle seat and the child’s size. These features ensure optimal positioning and comfort across different stages of growth. The Britax EVOLVAFIX lacks mention of an adjustable backrest or multi-position headrest in its specifications. Instead, it relies on its EasyRecline feature for recline adjustment without reinstallation. While the Britax offers comfort through reclining, the Cybex’s comprehensive adjustability provides superior flexibility in maintaining correct alignment and fit within various vehicles.

Which should you buy?

If cost and portability are your top priorities, the Cybex Pallas B is the clear choice: it’s £29.05 cheaper at £129.95 and weighs 1.5 kg less than the Britax Römer EVOLVAFIX, making it easier to move between vehicles. Its 12-way headrest and adjustable backrest also offer greater adaptability for growing children. However, if you prefer a seat that keeps the 5-point harness usable up to 22 kg (approximately 105 cm), the Britax EVOLVAFIX provides longer harness protection. Despite being more expensive and heavier, it still offers excellent value given its bestseller rank of 5, indicating strong market trust. Ultimately, the Cybex Pallas B wins for overall balance of safety, adjustability, and affordability, while the Britax EVOLVAFIX remains ideal for those prioritising extended harness use.