Diono radian® 3R Convertible Car Seat

Sold Out
$489.00 $435.29 including GST
($378.51 excluding GST & international orders)
Or 10 interest free payments from $43.53 with What's this?

The original all-in-one convertible car seat designed to fit three across and with our famous steel core inside for optimum safety. Now rear facing for even longer (up to 22.7 kg) and suitable from birth up to 54.4 kg, expect 10 years of safety from just one car seat.

Designed and engineered with complete rear facing protection, the radian® 3R will keep now your precious cargo rear facing for even longer up to 22.7 kg (approximately four years old).

Built with a mechanically engineered, reinforced steel core made from automotive grade high strength steel, the radian® 3R is always ready to shield and protect, and 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® 3R with original fold for easy transport plus storage and steel reinforced cup holders to store essential road trip drinks and snacks. The radian® 3R is also aircraft certified (FAA approved) so you can take safety with you wherever you go.


  • 10 YEARS 1 CAR SEAT - With four ways to travel from birth to booster the radian® 3R adapts as your child grows to offer a custom fit from birth up to 54.4 kg.
  • THE ORIGINAL 3 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 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.
  • EASY REMOVE COVERS - The radian® 3R features easy remove covers. So when the next journey gets messy, quickly remove the covers to machine wash and dry.

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 19-42 cm
  • Overall maximum height 144.8 cm

Customer Reviews

Based on 4 reviews
3 across

We wanted to be able to fit 3 car seats across and the Diono Radian work so well. I love that our kids are comfortable and safe and will be right up to 10 years old.

Want more space? Get these

We bought 2 of these for Mr 3 and Mr 4 and wow, we have a tonne more space in our car now. Boys love them. The harness is secure and they are comfortable for the kids to keep on and keep safe. Highly recommend A++++

Best buy

Structurally sound and easy to install

Great seat for small cars

Happy with the instal after adding a angler great seat for my swift.

Related products

View all
Korbell® Plus Nappy Bin Refills - Winkalotts
$50.00 $39.49
Tommee Tippee Sangenic Nappy Bin Cassette Refills - Winkalotts
From $89.99 $39.99
Diono radian® 3RXT Convertible Car Seat - Winkalotts
Diono radian® 3RXT Convertible Car Seat
Black Jet 9
Blue Sky 2
Purple Plum 3
Red Cherry 4

4 colours available

$599.00 $533.19
Diono cambria 2 Booster Seat - Winkalotts
Diono cambria 2 Booster Seat
Black 5
Blue 2
Pink 3

3 colours available

$209.00 $188.99

★ Reviews ★

Let our customers speak for us.

1400 reviews

Great quality product, baby loves it! Quick delivery

Love to dream Sleep suit

This is a wonderful sleep suit. Bub is always so cosy when I put it on for his night sleep. Ever since purchasing a couple of these he has slept so much better. I wish they made them for adults 😜


I was very satisfied with the fast transaction and the product as well. It was a gift to our dear friend who lives in Auckland. It was delivered within 3 days from the time I ordered it online. Moreover, my friend was very happy with the car seat. It was exactly what she was looking for. :)

Prompt delivery

Not used yet but looks like a good product that is easy to use when travelling. Very prompt delivery and good price.

Great product

Lovely warm and soft changing mat. Great price. Prompt delivery.