--- product_id: 181007867 title: "Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet" brand: "diono" price: "€ 545.43" currency: EUR in_stock: false url: https://www.desertcart.hr/products/181007867-diono-radian-3rxt-4-in-1-convertible-car-seat-rear store_origin: HR region: Croatia --- # Slim fit 3-across design maximizes car space 4-in-1 convertible design adapts for 10 years Steel-reinforced frame for ultimate protection Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet **Brand:** diono **Price:** € 545.43 **Availability:** ❌ Out of Stock ## Summary > 🚗 Safety Meets Sleek: The Last Car Seat You'll Ever Need! ## Quick Answers - **What is this?** Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet by diono - **How much does it cost?** € 545.43 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/181007867-diono-radian-3rxt-4-in-1-convertible-car-seat-rear) ## Best For - diono enthusiasts ## Why This Product - Trusted diono brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Space-Savvy Slim Fit:** Fits 3 car seats across without compromising comfort or safety—perfect for growing families. - • **Grow-With-You Versatility:** Seamlessly converts from infant rear-facing to booster forward-facing for a decade of use. - • **Effortless Comfort & Safety:** 12-position adjustable headrest and 2-in-1 infant wedge ensure a perfect fit at every stage. - • **Travel-Ready & FAA Approved:** Foldable design and aircraft certification mean safety goes wherever life takes you. - • **Built to Protect, Engineered to Last:** Automotive-grade steel core shields your child in every ride. ## Overview The Diono Radian 3RXT is a premium 4-in-1 convertible car seat designed for 10 years of use, supporting children from 5 to 120 pounds. Featuring a steel-reinforced frame for superior crash protection, it offers extended rear-facing capability up to 50 pounds and a slim profile that fits three seats across most vehicles. With 12 adjustable headrest positions, a 2-in-1 infant wedge for ergonomic support, and FAA certification for air travel, it combines safety, comfort, and convenience for modern families on the go. ## Description The Diono Radian 3RXT is the original slim-fit 3 across all-in-one convertible car seat, trusted by over a million parents to protect their child from baby to booster seat (5 - 120 lb / 2.2 kg - 54 kg). Lovingly engineered with the famous Diono steel reinforced frame and now rear facing for even longer, expect 10 years of safety from just one car seat. The Radian 3RXT provides safe and comfortable baby positioning thanks to the new 2-in-1 infant positioning liner with integrated newborn baby travel high wedge. The wedge creates a lie-flat travel position, pushing baby up to reduce head slump while helping to keep airways open. As your baby grows, simply remove the wedge to allow the 2-in-1 infant positioning liner to give extra comfort and support. Designed and engineered with complete rear facing protection, so you can keep them in a safe rear facing convertible car seat for longer up to 50 pounds. Then as they transition from rear facing to forward facing booster seat the aluminum reinforced headrest can be adjusted to one of 12 positions for safety up to 57 inches tall. Built with a mechanically engineered, reinforced steel frame, made from automotive grade high strength steel, the radian is always ready to shield and protect. And when your family grows, the slim-fit design will fit 3 across with Diono radian combination in most vehicles without compromising child safety or passenger comfort. Our SuperLATCH system (UAS Compatible) makes installation easy and super secure. As travel car seat experts, Diono have naturally built in super portable features to the Radian 3RXT with original fold for easy transport and storage and steel reinforced cup holder to store essential road trip drinks and snacks. The radian is also aircraft certified (FAA approved), so you can take safety with you wherever you go. ## Features - AWARD WINNING RADIAN ALL-IN-ONE CONVERTIBLE CAR SEAT - From infant to booster seat, rear and forward facing the radian 3RXT adapts as your child grows for 10 years of use (2.2 - 54 kg / 5 - 120 lb) - REAR FACING FOR LONGER - Designed for safe rear facing travel from 5 50 lb / 2.3 - 22.7 kg complete with newborn travel high wedge to protect as they grow from baby, infant to toddler - ONE HAND EASY ADJUST 12 POSITION HEADREST - Creates a safe and comfortable fit for rear facing, forward facing and booster seat modes - STEEL REINFORCED FRAME - Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect - 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B083F5W34S | | Age Range Description | Newborn | | Best Sellers Rank | #230,280 in Baby ( See Top 100 in Baby ) #169 in Convertible Child Safety Car Seats | | Brand | Diono | | Color | Black Jet | | Customer Reviews | 4.7 4.7 out of 5 stars (2,888) | | Forward Facing Maximum Weight | 120 Pounds | | Forward Facing Minimum Weight | 22 Pounds | | Global Trade Identification Number | 00677726500208 | | Harness Type | 5-Point | | Included Components | radian® 3RXT car seat, detachable rear-facing base, foam harness pads, 2-in-1 head and body support infant insert, lap belt cushion, cup holder, Safe Stop® energy absorbing harness, rear-facing top tether, Instruction manual | | Installation Type | Latch | | Item Dimensions D x W x H | 16"D x 17"W x 28.5"H | | Item Type Name | All-in-One | | Item Weight | 28.1 Pounds | | Manufacturer | Diono | | Manufacturer Warranty Description | 12 months | | Material Type | Alloy Steel, Plastic, Polypropylene, Polystyrene | | Maximum Height Recommended | 57 Inches | | Maximum Weight Recommendation | 120 Pounds | | Minimum Height Recommendation | 18.1 Inches | | Minimum Weight Recommendation | 5 Pounds | | Model Number | 50020 | | Number of Height Positions | 12 | | Orientation | Convertible Seat | | Part Number | 50020 | | Rear Facing Maximum Weight | 50 Pounds | | Rear Facing Minimum Weight | 5 Pounds | | UPC | 677726500208 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Diono - **Color:** Black Jet - **Installation Type:** Latch - **Material:** Alloy Steel, Plastic, Polypropylene, Polystyrene - **Orientation:** Convertible Seat ## Images ![Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet - Image 1](https://m.media-amazon.com/images/I/71X8NaIqxYL.jpg) ![Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet - Image 2](https://m.media-amazon.com/images/I/810DwRPoWkL.jpg) ![Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet - Image 3](https://m.media-amazon.com/images/I/71aHEy1oYBL.jpg) ![Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet - Image 4](https://m.media-amazon.com/images/I/713JTE7rJ7L.jpg) ![Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet - Image 5](https://m.media-amazon.com/images/I/71KEhLItK+L.jpg) ## Available Options This product comes in different **Color, Style** options. ## Frequently Bought Together - DIONO Radian 3RXT Latch - Diono Ultra Mat, Vehicle Seat Protector, Black 1 Pack,40241 - Diono Angle Adjuster Car Seat Leveler, Car Seat Wedge Cushion, Foam Provides More Legroom for Rear-Facing Car Seats --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/181007867-diono-radian-3rxt-4-in-1-convertible-car-seat-rear](https://www.desertcart.hr/products/181007867-diono-radian-3rxt-4-in-1-convertible-car-seat-rear) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-19*