Diono Radian® 3R Latch All-in-One Convertible Car Seat

Gray Slate
Black Jet
Red Cherry
Blue Sky
Pink Blossom

radian® 3R 2020

The original All-in-One convertible car seat designed to fit 3 across and with Diono's famous steel core inside for optimum safety. Now rear facing for even longer (up to 50 lb/ 22.7 kg) and suitable from birth up to 120 lb/ 54 kg, expect 10 years of safety from just one car seat.

10 Years One Car Seat

With 4 ways to travel from birth to booster, the radian® 3R adapts as your child grows to offer a custom fit from birth up to 120 lb/ 54 kg

The Original 3-Across

Built with Diono's famous radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.

Rear Facing Longer

With extended rear-facing from birth up to 50 lb / 22.7 kg to keep your child in the safest travel position for as long as possible.

New for 2020

  • Rear-facing for longer: Now up to 50 lbs / 22.7 kg
  • Extended lifespan: Now suitable from birth up to 120 lbs / 54 kg
  • Improved fabrics: New and updated fabrics that are easy to remove and wash
  • Instruction Booklet: New booklet to improve the user experience


  • Suitable up to 120 lb: The 2020 radian® 3R is now suitable from birth up to 120 lb in high back booster mode. 
  • Steel Core: Mechanically engineered, reinforced steel core. Made from automotive grade high strength steel. 
  • Side Impact Protection: Aluminium reinforced sides and thick energy absorbing foam distributes crash forces.
  • Easy Remove Covers: Radian 3R features easy remove covers. So when the next journey gets messy, easily remove to machine wash.
  • SuperLATCH™ installation: SuperLATCH™ system makes installation easy and super secure. An audible click lets you know when connectors are locked in and safe.
  • XL Anti-slip Harness Pads: Memory foam harness pads with anti-slip backing for added safety and comfort. 
  • Memory foam comfort: The radian® 3R features memory foam padding in the seat base for optimum child comfort.
  • Travel ready: Radian car seats are super portable and fold flat for easy travel. They are also FAA Approved and certified for use on aircraft!
  • 10 year life from the date of purchase


  • Usage:
    • Rear-facing: 5 - 50 lbs
    • Forward-facing: 22 - 65 lbs in a 5-point harness
    • Booster: 40 -120 lbs (and up to 57")
  • Dimensions: 28.5" H x 17" W x 16" D
  • Folded: 28.5"H x 17”W x 7"D
  • Weight: 25.8 lbs


Sign up today!