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Radian® 3QX Back to School Pack


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Radian® 3QX Back to School Pack

The ultimate 3-Across, All-in-One convertible car seat from birth to booster (4 - 120 lb.) provides the next generation in car seat safety. It features three-stages of complete newborn protection and Diono SafePlus™ engineering. Now with 3 bonus travel accessories.


  • Why parents will love it: The ultimate 3-across Radian® 3QX adapts as your child grows to offer a custom fit from birth up to 120 lb. It's designed with SafePlus™ protection to keep your child rear-facing for even longer. Now with 3 great bonus travel accessories to keep them safe, protected and content
  • Why kids will love it: A memory foam cushion, expandable sides and seat bottom adjust for a perfectly comfortable ride and fit, plus the low-sitting profile makes it easy for kids to get in themselves when they're ready. Plus, keep kids’ favorite travel items organised and within reach with the use of the Stow ’N Go® XL
  • Child weight/height: 4–50 lb. rear-facing with included infant insert; 22–65 lb. forward-facing with harness; 40–120 lb. forward-facing as booster
  • Safety features: Three-stage complete newborn protection: SafePlus™ newborn travel high wedge, SafePlus™ 2-in-1 infant positioning liner and SafePlus™ newborn harness pads to provide a custom fit from birth; SafePlus™ steel anti-rebound bar for increased stability and reduced rebound rotation by up to 50% to keep your child rear-facing up to 50 lb.; with SafePlus™ 6 layers of side impact protection, SafePlus™ steel core and SafePlus™ easy adjust 12-position headrest. The additional Ultra Mat® Car Seat Protector is built with an anti-slip design to prevent car seat slipping, keeping your children secure in the back seat. Plus, Starry Night window shade provides complete protection and is glow in the dark
  • Harness: Five shoulder and three buckle positions
  • Car installation: SuperLATCH system for easy installation

Product Specs

  • Car Seat - Minimum User Weight: 4 lb
  • Car Seat - Maximum User Weight: 120 lb
  • Car Seat - Minimum User Weight - Rear Facing: 4 lb
  • Car Seat - Maximum User Weight - Rear Facing: 50 lb
  • Car Seat - Maximum User Weight - Rear Facing LATCH: 35 lb
  • Car Seat - Minimum User Weight - Forward Facing: 22 lb
  • Car Seat - Maximum User Weight - Forward Facing: 65 lb
  • Car Seat - Maximum User Weight - Forward Facing LATCH: 40 lb
  • Car Seat - Minimum User Weight - Booster: 40 lb
  • Car Seat - Maximum User Weight - Booster: 120 lb
  • Car Seat - Maximum User Height: 57.1 in
  • Car Seat - Product Height: 28.5 in
  • Car Seat - Product Width: 17 in
  • Car Seat - Product Depth: 16 in
  • Car Seat - Seat Weight: 31.3 lb
  • Car Seat - Number of Head Support Positions: 12
  • Ultra Mat - Product Height: 48 in
  • Ultra Mat - Product Width: 18.9 in
  • Stow n Go XL - Product Height: 25.2 in
  • Stow n Go XL - Product Width: 16.1 in
  • Starry Night - Product Height: 20.1 in
  • Starry Night - Product Width: 16.1 in

Care & Maintenance

Covers: Machine wash cold, line dry. Shell and Components: Spot clean

Warranty Information

12 months standard warranty - extended to 36 months when you register with diono post purchase