Diono Radian® 3QXT FirstClass SafePlus

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Upgrade to award winning FirstClass™ 3-across convertible car seat and travel with ultimate SafePlus™ engineering. Up to 10 years of use without compromise. The Radian® 3QXT®+ FirstClass™ SafePlus™ is shipped with a complimentary Ultra Mat™ in the box, designed to cover the entire vehicle seat to keep car seats firmly installed without causing harm to the upholstery, protecting both car and baby.

Granted by the Insurance Institute for Highway Safety (IIHS), the BEST BET award is bestowed to car seats and boosters that provide good belt fit for typical ages approximately from 4 to 8 years old in almost any car, minivan, or SUV. The IIHS is an independent, scientific, and educational organization dedicated to reducing injuries and property damage from motor vehicle crashes through the education of consumers, policymakers, and safety professionals.


    • 10 Years 1 Car Seat® - from Birth to Booster (4 - 120 lb) it's all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat!
    • Safeplus™ Rear-Facing Engineering up to 50 lb. Includes 5 stages of newborn protection and our steel anti-rebound bar that reduces rebound rotation by up to 50% while increasing space for your growing child.
    • Fits3 Across - the ingenious design adds SafePlus™ 8-layer side impact protection with zero compromises to safety, space, or comfort.
    • Mechanically engineered from reinforced automotive grade high-strength steel, our unique core shell shields and protects your child.
    • One hand easy-adjust 12 position SafePlus™ headrest completes 8-layers of enhanced, rigorously tested, side impact protection.
    • The original and only all-in-one convertible car seat that folds for travel or compact storage. FAA approved for airline use.
    • Forward-facing FirstClass™ comfort with the 2-in-1 calf support and durable toddler liner.


    • Usage:
      • Rear-facing: 4 - 50 lbs
      • Max rear facing LATCH: 35 lb
      • Forward-facing: 22 - 65 lbs in a 5-point harness
      • Max forward facing LATCH: 40 lb
      • Booster: 40 -120 lbs (and up to 57")
    • Product Height: 28.5 in
    • Product Width: 17 in
    • Product Depth: 16 in
    • Product Height - Folded: 28.5 in
    • Product Width - Folded: 17 in
    • Product Depth - Folded: 11.5 in
    • Seat Weight: 34.2 lb
    • Number of Head Support Positions: 12


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