Diono Radian 3QX Latch Convertible Car Seat 2020

Diono Radian 3QX Latch Convertible Car Seat 2020

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Diono 2020 Radian 3QX Latch All-In-One Convertible Car Seat

The new Diono Raidan 3QX, the ultimate 3 across All-in-One car seat from birth to booster. Featuring 3 stages of complete rear facing protection and all new Diono Safe+ engineering to provide the next generation in car seat safety.



4-50 lb / 1.8-22.7 kg


22-65 lb / 10-29.5 kg

Booster mode

40-120 lb / 18-54 kg

Seated torso height

7.5-16.5″ / 19-42 cm

Overall maximum height

up to 57″ / 144.8 cm


25.8 lb / 11.7 kg

From baby's first journey the radian 3QX provides complete protection, with Safe+ newborn travel high wedge, Safe+ 2-in-1 infant positioning liner and Safe+ Anti-slip harness pads for added comfort and safety.

Engineered following the latest European research and technology in crash energy management, the radian 3QX features 6 layers of side impact protection. Interlocking EPS and EPP foam, high density plastic and steel reinforcement combine to create ultimate side impact protection, without compromising 3 across fit in most midsize vehicles.

As they transition to forward facing, the Safe+ easy adjust 12 position headrest is contoured to improve child head containment and provides a 22% increase in occupancy range from the radian R series.

All of these great features have been combined with Safe+ engineering, with the 3QX subjected to a combination of the most rigorous crash tests; including side impacts and rollover test to ensure the safest seat possible.

Parents can also expect the travel friendly traits Diono is famous for, including convenient fold and FAA approval for use on an aircraft. So, no matter where you go you can take Diono safety with you.


  • 3 STAGE REAR FACING PROTECTION - Features Safe+™ newborn travel high wedge, Safe+™ 2-in-1 infant positioning liner and Safe+™ steel anti-rebound bar for complete rear-facing protection.
  • REAR FACING FOR LONGER - Designed and engineered with all new Diono Safe+™ protection. Now you can keep your child rear facing for even longer up to 50 lb (approx. 4 years old).
  • SAFE+™ ENGINEERING - radian® 3QX is subjected to a combination of the most rigorous crash tests to make sure we have the safest seat possible.
  • 10 YEARS 1 CAR SEAT - With 4 ways to travel from birth to booster, the radian® 3QX adapts as your child grows to offer a custom fit from birth to 120 lb.
  • SLIM-FIT DESIGN FITS 3 ACROSS - Built with our famous radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.

1 Review

  • 5
    Diono 3QX

    Posted by Unknown on Jul 20th 2020

    Great car seat with the ability to fit 3 across in mid size vehicle.

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