Diono Radian 3R Convertible Car Seat All In One Slim Fit 3 Across

Introducing the Diono Radian 3R—the original slim-fit 3 across All-in-One convertible car seat that grows with your family. In Jet Black, it protects your child from infancy through booster stages (5–120 lb) with a single, long-lasting seat designed for real life.

Designed for complete rear-facing protection, the Radian 3R keeps little ones safer for longer. It supports rear-facing use up to 50 lb, giving you the option to prioritize neck and spine protection during those early years, while the reinforced steel frame adds automotive-grade strength you can feel every time you buckle in.

The slim-fit design is purpose-built for families who need three-across seating without sacrificing safety or comfort. In most vehicles, the Radian 3R fits three-across, reducing the need to compromise on either child safety or passenger space.

Installation and travel are simplified for busy households and frequent travelers. The SuperLATCH system (UAS Compatible) makes a secure, straightforward installation, while the seat folds for easy transport and storage. It’s FAA-approved, so you can take safety with you on flights without swapping seats mid-trip. The covers are removable and machine washable for easy cleaning after mealtime messes or outdoor adventures.

• All-in-One 3-in-1 seat for rear-facing, forward-facing, and booster use (5–120 lb).
• Slim-fit 3 Across design fits in most vehicles, preserving room for passengers while keeping kids safe.
• Steel-reinforced frame with automotive-grade high-strength steel for durable, trusted protection.
• Rear-facing up to 50 lb to maximize safety during early years.
• Easy, secure installation with SuperLATCH system and UAS compatibility.
• Travel-ready folding design and FAA approval for aircraft use.
• Maintenance-friendly removable, machine-washable covers.
• 10-year usable life built to last through years of growing children.

The Diono Radian 3R is ideal for growing families, carpooling parents, and multi-vehicle households who demand safety without sacrificing space. It addresses common challenges like finding seats that fit three across, keeping children rear-facing longer, and simplifying travel with a one-seat solution that travels well and cleans easily.

Experience dependable safety, space-saving design, and long-term value with the Diono Radian 3R. Ready to simplify your car-seat strategy and keep your child secure for years to come? Add to cart now and invest in a seat that protects from day one through the journey ahead.