Britax Trifix Group 1 Car Seat, Max Black Thunder

Special offer

    In-store Only

Product information

Light, safe and easy to use, this Group 1 car seat can be used in cars with Isofix points and Top Tether anchorage points. This is Britax's first seat to feature the Isofix+ installation system: the latest innovation in energy management that allows you to connect the seat directly to the car's Isofix and Top Tether anchorage points. Easy to read indicators clearly show you when the Isofix hooks and top tether have been correctly installed, for added peace of mind.

The Britax Trifix features a V-Tether system which intelligently absorbs energy in proportion to a collision and, as it provides a third anchorage point, limits the rotational movement of the seat. Pivot Link technology also works to reduce forward and rotational movement during an accident. SI-Pad technology and softly padded side wings provide optimum side impact protection.

Easy to install and easy to use: children can easily be placed in the seat, the harness is quickly adjusted and the cover can be removed and washed. The 5 point harness has one-pull adjustment and the headrest can be adjusted with one hand. Multiple recline positions allow you to adjust the seat without disturbing your child.

The Britax Trifix Car Seat is not available to purchase online. We recommend contacting your nearest branch to check availability.

All our car seats and infant carriers comply with current European regulations ECE R44-03 or ECE R44.04.


  • Under no circumstances should a car seat be used on a passenger seat where there is an airbag.
  • Correct fitting of all car seats and boosters is of paramount importance to make them most effective in the event of an accident. Not all car seats fit all cars and it is important to check for fitting suitability on all cars you intend fitting the seat to, as well as re-checking if you change your car.
  • Always read the instruction booklet which comes with your car seat to achieve a safe and correct fitting, retaining the guide for future reference. We recommend fitting your car seat in advance of first using it.
  • We recommend that babies shouldn`t be left in Group 0/0+ car seats (infant carriers) for prolonged periods.



  • Please make sure that you check the car seat you choose is suitable for your car before ordering.
  • Some of our shops offer a car seat fit test, where a Nursery advisor will test the display model in your car to check that it will fit properly. Please contact your local shop to see if this service is available. Alternatively, please contact the car seat manufacturer who will be able to advise whether their model will be suitable for your car.
  • Find your nearest department store


Car seats are categorised into the following groups and it is imperative that a category is chosen so the child`s weight falls within the range indicated:

Car Seat groups:

Group Child's weight approx. age of child
0 birth up to 10kg/22lb birth up to 6-9 months
0+ birth up to 13kg/29lb birth up to 12-15 months
0+ & 1 birth up to 18kg/40lb birth to up to about 4 years
1 9-18kg/20-40lb about 9 months to 4 years
1 & 2 9-25kg/20-55lb about 9 months to 6 years
2 15-25kg/33-55lb about 4 to 6 years
1, 2, 3 9-36kg/20-79lb about 9 months to 12 years
2 & 3 15-36kg/33-79lb about 4-12 years

Note: some car seats will be approved in two or more groups.

H65 x W45 x D54cm
Eligible for International Delivery
Facing position
Group band
Group 1 car seat
Isofix Information Isofix is a system of dedicated attachment points in the car which car seats can be locked into. We recommend checking your car handbook for further information.
Isofix compatible
Manufacturer's Warranty
24 months
Nursery Type
Car Seats
Reclining positions
Suitable From
9 months
Weight Information Unpackaged weight
Weight or height of child
9-18kg or 20-40lb

Brand Story

Britax and Römer have been part of a family since 1978 and BOB since 2011. Now they are making those ties even stronger. As one brand they can go even further in helping parents’ live family life to the full. With innovation in their DNA, they have an unchanging commitment to always going the extra mile.

Britax believes in family life without limits. They aim to drive safety standards to ensure children are protected on the move. They push boundaries in smart design to make life in motion run smoother than ever.


  • Click & collect

    Click & collect from John Lewis and Waitrose shops tomorrow from 2pm
    Find out more
  • UK delivery

    In-store only
    Find out more
  • International delivery not available


We want you to be happy with your purchase. If you're not, depending on the type of product, you can make free returns in the UK via John Lewis shops, Royal Mail, Collect+, or MyHermes. If you need to arrange collection of large or heavy items, call us on 03456 049 049. For international returns queries, call us on +44 1698 545 454. Find out more about returns.

You'll find returns information on your delivery note. Unless faulty, we'd like you to make your return within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.

Q & As


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This item is only available in our shops