The Diono Radian 3 R Safe+ Convertible Car Seat is the original 3 Across All-In-One™ seat, designed for parents who need a safe, space-saving, and long-lasting car seat. With SafePlus® engineering and reinforced automotive-grade steel, it ensures maximum safety and durability from birth to booster. Designed to grow with your child, it offers four seating modes, supporting children from 4 lbs to 120 lbs. The slim-fit design allows you to fit three seats across in most vehicles without compromising comfort. Its mechanically engineered frame, enhanced side impact protection, and an anti-rebound bar ensure superior protection on every journey. Whether rear-facing, forward-facing, or as a booster, this seat provides ultimate comfort, security, and convenience for your growing child.
The Diono Radian 3 R Safe+ features a 12-position easy-adjust headrest, six layers of side-impact protection, and plush padding for extra comfort. Its foldable design makes it FAA-approved for travel, while the machine-washable cover ensures easy maintenance. The adjustable recline base allows a customized fit in different vehicles, and the removable cup holder adds convenience. Compatible with Diono accessories like the Angle Adjuster, Easy View Mirror®, Ultra Mat™ Car Seat Protector, and Side Impact Management Pod, this seat adapts to various needs while keeping safety as the top priority.
Diono, with over 20 years of expertise, is a pioneer in car seat innovation since 1999, introducing industry firsts such as the Radian® All-in-One seat with a full steel core. Based in Seattle, the brand is committed to designing high-quality, rigorously tested products that meet and exceed safety standards. From car seats to strollers, baby carriers, and travel accessories, Diono creates thoughtfully engineered solutions that prioritize child safety, comfort, and ease of use for parents worldwide.
Diono Radian® 3RXT® SafePlus + Booster Seat Features:
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All-in-One Convertible Design: Supports rear-facing, forward-facing, and booster modes from birth to 120 lbs.
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Extended Rear-Facing: Allows rear-facing use up to 50 lbs, exceeding standard safety recommendations.
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Slim-Fit 3-Across: Designed to fit three seats across in most vehicles, maximizing space without compromising safety.
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High-Strength Steel Core: Reinforced automotive-grade steel frame enhances durability and impact protection.
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SafePlus® Side Impact Protection: Six-layer protection for superior safety in side-impact collisions.
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12-Position Adjustable Headrest: Easily adapts as your child grows for long-term comfort.
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Foldable & Travel-Friendly: FAA-approved and compact for travel with a foldable design for easy storage.
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Comfortable Seating: Plush memory foam padding ensures a comfortable ride at every stage.
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Removable Cup Holder: Keeps drinks within reach and easily detaches for cleaning.
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Machine-Washable Cover: Easy-to-remove fabric makes cleaning hassle-free.
| Unfolded Dimensions: | 28.5" H × 17" W × 16" D |
| Folded Dimensions: | 28.5" H × 17" W × 11.5" D |
| Seat Weight: | 29.3 lbs |
| Number of Head Support Positions: | 12 |
| FAA Approved: | Yes |
| Cup Holders: | Yes |
| Fits 3-Across: | Yes |
| Compatible With: | Diono accessories like the Angle Adjuster, Easy View Mirror®, Ultra Mat™ Car Seat Protector, Side Impact Management Pod. |
| Recommended Use | |
| Minimum User Weight: | 4 lbs |
| Maximum User Weight: | 120 lbs |
| Rear-Facing Weight Limit: | 4 - 50 lbs |
| Rear-Facing LATCH Limit: | 35 lbs |
| Forward-Facing Weight Limit: | 22 - 65 lbs |
| Forward-Facing LATCH Limit: | 40 lbs |
| Booster Mode Weight Limit: | 40 - 120 lbs |
| Maximum User Height: | 57.1" |
| Cleaning Instructions: | Machine wash covers on cold and dry flat. Spot clean shell and components as needed. Do not bleach, iron, or dry clean. Store in a cool, dry place away from direct sunlight and extreme heat. |
| Safety Measures: | Includes SafePlus® side impact protection, anti-rebound bar, and 5-point harness for maximum security. Rear-facing up to 50 lbs for enhanced safety. Always install according to Diono and vehicle manufacturer guidelines. FAA-approved for travel. |
| Brand: | Diono |
| Black Jet Manufacturer SKU: | 50630 |
| UPC: | 677726506309 |
| Purple Plum Manufacturer SKU: | 50637 |
| UPC: | 677726506378 |
| Blue Sky Manufacturer SKU: | 50633 |
| UPC: | 677726506330 |
- 1- Radian 3 R Safe+ Convertible Car Sea
- 1- Safe Stop®
- 1- Lap Belt Cushion
- 1- Anti-Rebound Bar
- 1- Rear-Facing Base
- 1- Cup Holder
- 1- Harness + Buckle Pads
Is this car seat suitable for newborns?
Yes, it supports newborns from 4 lbs with proper harness adjustments and rear-facing up to 50 lbs for added safety.
Can I install three of these car seats in my vehicle?
Yes, the slim-fit design allows three seats across in most mid-sized vehicles without compromising safety or comfort.
Is this car seat foldable for travel?
Yes, it folds for compact storage and is FAA-approved, making it perfect for airplane travel.
What makes the SafePlus® engineering unique?
SafePlus® includes six layers of side impact protection, an anti-rebound bar, and a reinforced steel frame for ultimate security.
How long can my child use this car seat?
It grows with your child from birth to booster (4–120 lbs), offering up to 10 years of use.
Is the cover removable and washable?
Yes, the machine-washable cover can be removed easily for cleaning.
Can I use this car seat forward-facing right away?
No, it is recommended to keep children rear-facing up to 50 lbs before transitioning to forward-facing.
Does this seat come with a cup holder?
Yes, it includes one removable cup holder that can be attached on either side.
What accessories are compatible with this car seat?
It works with Diono’s Angle Adjuster, Easy View Mirror®, Ultra Mat™, and Side Impact Management Pod, among others.
How much space does it take up in rear-facing mode?
It requires 30-36 inches of depth depending on your vehicle. The Angle Adjuster can help save space if needed.
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