Diono Radian 3QXT Ultimate 3 All-in-One Convertible Car Seat


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The diono radian 3qxt ultimate 3 across All-in-One car seat from birth to booster (4 – 120 lb / 1.8 – 54kg). Featuring advanced 4-in-1 newborn protection and all new SafePlus™ engineering to provide the next generation in car seat safety.


First, THE ULTIMATE diono radian 3qxt ALL-IN-ONE CONVERTIBLE CAR SEAT. From infant to booster seat, rear and forward facing the Radian® 3QXT adapts as your child grows for 10 years of use (4 – 120 lb / 1.8 – 54 kg)

Further, 4-IN-1 NEWBORN PROTECTION – Designed for safe rear facing travel from 4 – 50 lb / 1.8 – 22.7 kg complete with SafePlus™ inserts and SafePlus™ steel anti-rebound bar to reduce rebound rotation by 50%

Furthermore, SAFEPLUS™ ENGINEERING – Our most rigorously tested Radian® all-in-one convertible car seat; featuring SafePlus™ steel rear facing anti-rebound bar, steel reinforced frame, advanced side impact protection and diono SuperLATCH attachment

In addition, ONE HAND EASY ADJUST 12 POSITION HEADREST. – Contoured to improve child head containment and provides a 22% increase in occupancy range from the radian R series

Lastly, THE ORIGINAL RADIAN 3 ACROSS – Built with our famous Radian slim fit convertible design for a 3-across option only with Diono Radian® combinations without compromising child or passenger comfort. Feel safe having your children secure in the backseat

What’s Included:

  • Safe+ newborn travel high wedge

  • Safe+ 2-in-1 infant positioning liner
  • Safe+ anti-slip harness pads
  • Steel reinforced cup holder
  • Safe+ steel anti-rebound bar
  • Safe+ side impact management pad
  • Safe+ newborn protection insert
  • Safe+ anti-slip harness pads
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