The original 3 across All-in-One Car Seat just got better.

Shipment delayed.  We are working to get this resolved and will provide an update when available.  It is unlikely we will receive these before the end of 2025 unfortunately.

$599.00$599.00
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Radian® 3RXT Safe+®

  • DESCRIPTION  
  • SPECS
  • VIDEO

The original 3 across All-in-One Car Seat just got better. Upgraded with 18 improvements from the award-winning Radian® 3RXT, the Diono Radian® 3RXT Safe+® features Diono Safe+® engineering, Safe+® anti-rebound bar and advanced Safe+® side impact protection for complete protection from birth to booster 4 - 120 lb / 1.8 - 54 kg.

Features:

18 UPGRADES FROM RADIAN® 3RXT

Includes Safe+® easy adjust 12 position headrest, 6 layers of Safe+® Side impact protection and Safe+® testing.

COMPLETE REAR-FACING PROTECTION

Safe+® steel anti-rebound bar reduces rebound rotation by up to 50% for extended rear-facing travel up to 50 lb

SAFE+® ENGINEERING

Features a unique combination of engineering features and testing to the highest safety standards to ensure we have the safest seat possible.

10 YEARS ONE CAR SEAT

From rear-facing to forward facing Radian 3RXT Safe+® adapts as your child grows from birth to booster. Suitable from 4 - 120 lb / 1.8 - 54 kg.

SLIM FIT 3 ACROSS

Ultimate passenger comfort with spacious design but only 17" wide to fit 3 across in most midsize vehicles.

Product Specs

  • Minimum User Weight: 4 lb / 1.8 kg

  • Maximum User Weight: 120 lb / 54 kg

  • Minimum User Weight - Rear Facing: 4 lb / 1.8 kg

  • Maximum User Weight - Rear Facing: 50 lb / 22.7 kg

  • Maximum User Weight - Rear Facing LATCH: 35 lb / 15.8 kg

  • Minimum User Weight - Forward Facing: 22 lb / 10 kg

  • Maximum User Weight - Forward Facing: 65 lb / 29.5 kg

  • Maximum User Weight - Forward Facing LATCH: 40 lb / 18 kg

  • Minimum User Weight - Booster: 40 lb / 18 kg

  • Maximum User Weight - Booster: 120 lb / 54 kg

  • Maximum User Height: 57.1 in / 145 cm

  • Number of Head Support Positions: 12

  • Product Height: 28.5 in / 72.4 cm

  • Product Width: 17 in / 43.2 cm

  • Product Depth: 16 in / 40.6 cm

  • Seat Weight: 30.6 lb / 13.9 kg

  • Product Height - Folded: 28.5 in / 72.4 cm

  • Product Width - Folded: 17 in / 43.2 cm

  • Product Depth - Folded: 11.5 in / 29.2 cm

Care & Maintenance

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

Warranty Information

12 months standard warranty

Radian® 3RXT Safe+® Rear-Facing Installation

Radian® 3RXT Safe+® Forward-Facing Installation

Radian® 3RXT Safe+® Booster Mode Installation

The Diono Difference

radian® 3RXT Safe+® - diono® slimline 3 across convertible car seat with Safe+ engineering

Safe+ Engineering

The Radian® 3RXT SAFE+ features Safe+® STEEL REINFORCED FRAME - Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect.

radian® 3RXT Safe+® - diono® slimline 3 across convertible car seat with Safe+ engineering

Fits 3 Across

Built with our famous Radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.

radian® 3RXT Safe+® - diono® slimline 3 across convertible car seat with Safe+ engineering

10 Years One Car Seat

Every Radian® All-in-One Convertible Car Seat is designed to adapt as your child grows to offer a custom fit from birth to booster (up to 120 lb. / 54 kg)

radian® 3RXT Safe+® - diono® slimline 3 across convertible car seat with Safe+ engineering

Rear-facing for longer

Engineered to keep your child rear-facing for longer up to 50 lb. / 22.7 kg

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