Diono radian® 3RXT Convertible Car Seat

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$599.00 $533.19 including GST
($463.64 excluding GST & international orders)
Or 10 interest free payments from $53.32 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 17 reviews
    Love this seat

    We absolutely love this seat, easy to put in with instructions an our little one sits very comfortably in it an looks so safe


    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.

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    ★ Reviews ★

    Let our customers speak for us.

    1436 reviews
    Beyond Wonderful

    This is one of the best buggies I have ever purchased in my entire life! It is absolutely wonderful and both my babies love being in it. This buggy is so easy to push around & extremely light to carry when folded down. So easy to transport and the wheels on it are amazing! I also love that you can place the capsule in it. Delivery was super fast and impressive. Such a magnificent product that I truly do not regret purchasing for my little ones. I highly recommend purchasing this product form Winkalotts. Thank you so much for your astonishing services and of course fantastic product. We love it!

    Worriless cold nights

    Super warm and cozy for my second bubba. I am not worried anymore at night as he seems comfortable and warm. Great purchase. I always had love to dream products from swaddles to transition suit up to the sleep bodysuit for my first son.plus fast shipping from winkallots!!!!

    Worriless cold nights

    I am happy with this purchase, i ordered the bigger one for my toddler and it doesn’t matter coz it dont bother him even if its too buggy. Perfect for the winter nights as my son does not want blanket on him. Plus fast delivery from winkallots !!!!!

    Great Seat

    Somehow I missed out on getting the booklet that should have been in the box with the car seat so I had to go on line to try and work out how to install it- too hard for an oldie but fortunately as I had also purchased a second one for my son-in-law's car, he installed mine for me. It is quite big in my Corolla and means only a very small person can fit in the front seat in front of it - hopefully it will be much better when the baby is front-facing. My son-in-law has the same problem in his vehicle. The baby is very happy in it so that is the main thing.

    Great buy!

    Love this seat, plenty of room for my chunky monkeys thighs, good quality, portable, easy to clean & well priced! Also love that the tray slides into the storage space keeping things nice and tidy. Would happily recommend this product!