Diono radian® 3RXT Convertible Car Seat

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$599.00 $534.99 including GST
($465.21 excluding GST & international orders)
Or 10 interest free payments from $53.50 with What's this?

The Diono radian® 3RXT is the original three across all-in-one convertible car seat, trusted by over a million parents to protect their child from birth to booster (2.3-54.4 kg) Lovingly engineered with the famous Diono steel core and now rear facing for even longer, expect 10 years of safety from just one car seat.

The 2020 radian® 3RXT provides safe and comfortable newborn positioning thanks to the new 2-in-1 infant positioning liner with integrated newborn travel high wedge. The wedge creates a lie flat travel position, pushing baby up to reduce head slump while helping to keep airways open. As your baby grows, simply remove the wedge to allow the 2-in-1 infant positioning liner to give extra infant comfort and toddler support.

Designed and engineered with complete rear facing protection, the radian® 3RXT will now keep your precious cargo rear facing for even longer up to 22.7 kg (approximately four years old). Then as they transition to forward facing, the aluminum reinforced headrest can be adjusted to one of 12 positions for safety that grows with them up to 144.8 cm tall.

Built with a mechanically engineered, reinforced steel core, made from automotive grade high strength steel, the radian® 3RXT is always ready to shield and protect. When your family grows, the slim fit design will fit three across in most vehicles without compromising child safety or passenger comfort.

As travel experts, Diono have naturally built in super portable features to the radian® 3RXT with original fold for easy transport and storage and steel reinforced cup holders to store essential road trip drinks and snacks. The radian® 3RXT is also aircraft certified (FAA approved), so you can take safety with you wherever you go.


  • SAFE & COMFORTABLE NEWBORN POSITIONING - Features newborn travel high wedge to create a lie flat travel position. Then as your baby grows, simply remove the wedge to allow the 2-in-1 infant positioning liner to give cosy, comforting support.
  • 10 YEARS ONE CAR SEAT - With four ways to travel from birth to booster, the radian® 3RXT adapts as your child grows to offer a custom fit from birth up to 54.4 kg.
  • THE ORIGINAL THREE ACROSS - Built with our famous radian® slim fit design, to fit three across in most vehicles without compromising child or passenger comfort.
  • REAR FACING FOR LONGER - Designed and engineered to keep your child rear facing for even longer up to 22.7 kg (approximately four years old).
  • STEEL CORE - Mechanically engineered, reinforced steel core made from automotive grade high strength steel to shield and protect.

Product Specifications:

  • Rear facing 2.3-22.7 kg
  • Forward facing 10-29.5 kg
  • Booster mode 18.1-54.4 kg
  • Seated torso height 19.1-41.9 cm
  • Overall maximum height 144.8 cm
  • Weight 12 kg

    Customer Reviews

    Based on 16 reviews

    Great seat! My 10 month old is currently in a spica cast for her hips and it's perfect for comfort and accommodating this! Great rear facing recline and sleek fitting in both our car and truck. Great purchase and super speedy service! Thank you so much.


    Awesome seat for miss 9 months. She even falls asleep again on car rides now that shes comfy and havls more space to bend her legs out. Loving it so far

    Great product, even better service

    Right at Christmas time I decided to purchase a car seat for my 5 month old. Thinking I wouldn’t get anything until the new year I made my order with winkalotts whom I have never purchased from before. It came within days and was so easy. Communication was fantastic and I am so happy with my wee fulla in his car seat. Thanks heaps. Will definitely use again.

    Good quality. Easy to install

    A nicely presented seat with everything you need stowed on board.
    We're happy to know this will last right from birth to over five.

    Diono rxt

    Love our Diono we now have 2

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    ★ Reviews ★

    Let our customers speak for us.

    1324 reviews
    Sturdy and easy to use

    I purchased the pod clip-on highchair in order to avoid the standard bulky floor based highchairs. I wanted something that was easy to 'install' and then pack away into the cupboard when not in use. The pod delivers just that. It is strong and well-made, and feels very safe and secure when installed. I was concerned it wouldn't fit on our table as it has a frame underneath the table top - but the frame was far enough back from the edge that the pod fit without hassle.
    I would highly recommend this - especially to grandparents who need something on hand, but don't want the bulk of a floor-based highchair every day. It is also compact enough to be perfect for travelling with.
    We started using this when our granddaughter was 5 months old. She loves being at the table with everyone else.

    Easy to assemble, put the little one in and clean! Too easy!

    Transition Swaddle

    This swaddle has been great now my daughter has her arms out. She still knows it's bedtime once it gets put on.

    Maxi-Cosi Vela AP Convertible Car Seat

    Fantastic carseat. Fits my little 6month old neice great (without the insert). I didn't realise it needed the tether strap and the isofix while rear facing, which is a bit fiddly. Length is smaller than other Maxi Cosi carseats we have which is a bonus if the front passengers want to have a little more leg room. Over all rating 8/10.

    Fantastic customer service

    The Nuna stroller is top quality.
    Winkalotts customer service has kept me up -to-date with my order and has helped out extensively with advice and alternative options when one or more items that I had ordered were not available on time due to shipping delays.
    Compliments for a fantastic customer service.