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๐ก๏ธ Safety that grows with your family โ sleek, smart, and built to protect every mile.
The Diono Radian 3RX is a premium 3-in-1 convertible car seat engineered for ultimate safety and longevity. Featuring a 12-position adjustable headrest, steel-reinforced frame, and extended rear-facing capability up to 50 lbs, it supports children from birth to booster (5-120 lbs). Its slim design fits three across most vehicles, making it ideal for growing families who refuse to compromise on safety or style. FAA-approved and easy to clean, the Radian 3RX is the all-in-one solution for parents seeking durable, adaptable protection on every journey.







| ASIN | B0977LJK3T |
| Additional product features | Fits 3 Across |
| Batteries required | No |
| Best Sellers Rank | #222,799 in Baby ( See Top 100 in Baby ) #176 in Convertible Child Safety Car Seats |
| Care instructions | Covers: Machine wash cold, line dry. Shell and Components: Spot clean |
| Customer Reviews | 4.5 4.5 out of 5 stars (239) |
| Forward-facing maximum child weight | 120 Pounds |
| Forward-facing minimum child weight | 22 Pounds |
| Harness type | 5-Point |
| Item Weight | 28.1 pounds |
| Item model number | 55014 |
| Material Composition | 92% Polyester, 8% Spandex |
| Material Type | Metal, Plastic |
| Maximum height recommendation | 57.1 Inches |
| Maximum weight recommendation | 120 Pounds |
| Minimum height recommendation | 18.1 Inches |
| Minimum weight recommendation | 5 Pounds |
| Number Of Items | 1 |
| Number of reclining positions | 12 |
| Orientation | Convertible Seat |
| Product Dimensions | 16 x 17 x 28.5 inches |
| Rear-facing maximum child weight | 50 Pounds |
| Rear-facing minimum child weight | 5 Pounds |
| Style | 3RX Fits 3 Across |
C**S
Bought for the back seat of my BRZ, does everything I wanted!
Gratefully, I haven't had occasion to see how well this seat protects my child in an accident, though I'll be sure to update this review if such an unfortunate thing occurs. It's important to note that a disadvantage to having this seat in a vehicle that isn't garaged is that with consistent sun exposure the top of the liner was sunbleached within two weeks of purchase. It hasn't seemed to negatively affect the durability, but it's certainly obvious I've parked in the sun. I gave this seat five stars because it's comfortable for my child, it seems stout and secure even when compared to other child seats we own, and it fits in the tiny, beveled Alcantara and leather seating of my BRZ's back seat, WITHOUT DAMAGING THE SEAT. The fun little "Child on the Go" sign was a great and unexpected perk. If you have a 2+2 sports coupe, I would recommend this seat over any other... especially if you primarily park where there isn't consistent sun exposure.
E**S
Love this carseat
My oldest child has this same one, I love this car seat. Itโs heavy, but I like that. Itโs very sturdy yet not too wide like other car seats. My kids sit comfortably in it, they donโt mind riding in it. I would absolutely buy again if I needed to.
G**S
One of the best
This car seat is slim, solid and very well designed. Storage on the back for the tether and child quick connect locks. Fits my 3 year old like a dream. Easy to hook up, besides being slightly heavy. The harness is high quality and my little guy is tucked in and well secured. Happy parent.
R**L
Slim yet comfortable seat!
I didn't expect to have to assemble the car seat, but it was simple. Installation in the car was also very easy. We have enough room for an adult to sit in the backseat, if necessary. My daughter seems pretty comfy - she fell asleep on her first ride in the new car seat! I would definitely recommend this brand and buy it again if I ever need another car seat.
C**N
Great car seat
Bought a set for our twins, perfect for itty bitty premie newborns. Twins are going on three now and other then dirty boy fingers everywhere they have held up super well! Ordered another for our daughter (now 3 mo.) would definitely recommend! We have an express van and can put three side by side, the seats are tight together but it is possible with our vehicle.
L**Y
Difficult to get right, but happy with the end result
That was a frustrating install. I read a review on here from a mechanical engineer that made me laugh, and feel a little better too -- I'm also an engineer and this made me sweat. Took several attempts to make it nice and tight, and safe. The thing doesn't budge a bit. I actually ended up using the clips that hook onto the anchors in the seat, as well as the seatbelt to strap it down. Now that it's in, it's fantastic! Oh, I should mention I installed forward facing. My knees are no longer touching the steering wheel! Thank goodness. A real space saver. The kiddo loves it too. Hope this is encouraging -- take a deep breath, maybe come back to it :). Good luck!!
A**N
Good
Good
P**E
perfect for nanna's car
This works great. I bought it for my mom to have one in her car. We also use it when we travel on airplanes as it's easy to get in and out.
Trustpilot
2 weeks ago
3 weeks ago