Group 1

The group classification refers to the old weight-based approval system; Group 1 roughly corresponds to children from 9 to 18 kg. The Britax Römer Trifix 2 i-Size follows the latest i-Size (R129) regulation and is suitable from 15 months to 4 years. We recommend always choosing based on your child's height and weight.

i-Size is the European R129 approval regulation, which classifies seats by the child's height and reinforces safety requirements, including side impact protection. i-Size seats install with Isofix and make it easier to choose the right seat. The Trifix 2 i-Size meets this regulation.

Yes. This seat was designed for installation with the Isofix system, which fixes it directly to the car's frame, reducing the risk of incorrect installation. We recommend confirming that your car has Isofix points and checking the manufacturer's compatibility list.

The Trifix 2 i-Size is designed for children from 15 months to 4 years and is used forward-facing. Safety guidance recommends keeping your child rear-facing for as long as possible in the early months; that's why this seat should only be used from 15 months, when the neck has better support.

Although i-Size seats are compatible with most cars fitted with i-Size ISOFIX, it's recommended to check the manufacturer's vehicle list and, if possible, test the fitting. The Bonabebe team can help clarify any compatibility questions before you buy.

The Trifix 2 i-Size grows with your child from 15 months to around 4 years. The time to move to the next group mainly depends on your child's height and weight reaching the limits set by the manufacturer. Check regularly whether your child's head goes above the top of the backrest.