SKU: 99685400124

Radian® 3R® All-in-One Convertible Car Seat

Sale price$99.00 Regular price$110.00
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Description

Radian® 3R® All-in-One Convertible Car SeatRadian 3R All in One Convertible Car Seat Description The original 3 across all in one convertible car seat now available in new, two toned colorways with additional features. Up to 10 years of safe use and great value. The original 3 Across all in one convertible car seat. Up to 10 years of safe use and great value. The ColorTheJourney Radian 3R features a head support pillow, comfort cushion, 2 XL cup holders, and high quality ComfortPlus memory

Radian® 3R® All-in-One Convertible Car Seat

Description

The original 3-across all-in-one convertible car seat - now available in new, two-toned colorways with additional features. Up to 10 years of safe use and great value.

The original 3-Across all-in-one convertible car seat. Up to 10 years of safe use and great value. The ColorTheJourney® Radian 3R features a head support pillow, comfort cushion, 2 XL cup holders, and high-quality ComfortPlus memory foam, always included. Designed and engineered with complete rear-facing protection, you can keep them in a safe rear-facing convertible car seat for longer, up to 50 lb. Built with a mechanically engineered, reinforced steel frame made from automotive-grade high-strength steel, the Radian® 3R is always ready to shield and protect. And when your family grows, the slim-fit design will fit 3-Across in most vehicles without compromising child safety or passenger comfort. Our SuperLATCH® system (UAS Compatible) makes installation easy and super secure. The original and only all-in-one convertible car seat that folds for travel or compact storage. FAA approved for airline use.


Features
  • 10 Years One Car Seat - from Birth to Booster (5 - 120 lb) it's all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat!
  • Rear Facing for Longer - lovingly engineered to keep your child rear-facing up to 50 lb.
  • Fits 3-Across - our famous slim-fit design 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.
  • High-quality ComfortPlus Memory Foam, always included.
  • The original and only all-in-one convertible car seat that folds for travel or compact storage. FAA approved for airline use.
  • Comfort Support - head support pillow, comfort cushion and 2 XL cup holders.
  • Additional features are exclusive to the following colorways: Black Storm, Blue Surge, Blue Razz Ice, Purple Wildberry and Pink Cotton Candy.


Specifications
  • Product Height (in): 28.4
  • Product Width (in): 16.9
  • Product Depth (in): 16.1
  • Product Height - Folded (in): 28.5
  • Product Width - Folded (in): 17.0
  • Product Depth - Folded (in): 7.1
FAQ

Car Seat, Product Manual, Safe Stop®, Lap Belt Cushion, Rear-Facing Base, Harness + Buckle Pads

We recommend the following Diono® Accessories: Angle Adjuster®, Car Seat Travel Backpack, Ultra Mat™, Easy View Mirror®

Yes, you should always read your Radian® 3R® product manual and the vehicle's manual that you plan to install it in before use and is sewn into the seat cover. Find more information in our safety hub here.

Your manual is located in a pouch sewn into the seat cover on the back of the seat on the left hand side about half way up the backrest underneath the seat cover. Here is a video that shows you here.

Yes, your Radian® 3R® is entirely suitable for a newborn. We recommend rear-facing from 4 lb to 50 lb as this is the safest way for a young child to travel. Learn more here.

Yes, your Radian® 3R® is suitable for your toddler. We recommend rear-facing up to 50 lb/forward-facing from 50 lb to 65 lb in the 5-point harness system.

Yes, your Radian® 3R® is suitable for your big kid. We recommend forward-facing in the 5-point harness system (up to 65 lb) then as a high back booster up to 120 lb.

When installing your Radian® 3R® rear-facing in some vehicles, the space-saving Angle Adjuster® can make more space available behind the front seat. Check out the video here.

Only use Diono® approved and crash-tested accessories with your Radian® 3R®. The accessories you can use are here.

Diono® is the only car seat manufacturer to offer a folding convertible car seat. This makes it the perfect travel seat as it is so compact and folds into a handy car seat travel backpack. Saving space for trunk or home storage.

51 in is the minimum vehicle seat width needed between the vehicle's interior structures to fit your Radian® 3R®. The Radian® fits 3-across in most mid-sized Sedans up. Learn more here.

Your Radian® 3R® can be used rear-facing up to 50 lb or 44 in height. We encourage rear-facing as long as possible since it is the safest way for children to travel!

You can use your Radian® 3R® until 65 lb forward-facing with the 5-point harness and then until 120 lb as a high back booster.

Your Radian® 3R® uses 30-36 in between the vehicle's backseat and front seat back, depending on the vehicle's seat shape and contour. Fitting in most vehicles' rear-facing, use our space-saving Angle Adjuster® if more space is needed.

No. Always follow our guidelines regarding use of items not included with the car seat. We only recommend the use of accessories and spare parts from Diono® as all of these have been tested for use with your Radian® 3R®.

No, the Radian® 3R® does not come with a cup holder, but you can purchase them separately here.

Our car seat fabrics are tested to ensure they do not contain any legally restricted harmful flame retardants. In order to meet Federal and Canadian Motor Vehicle Safety Standards for flammability, our car seat fabrics do contain flame retardants.

Safety is paramount. Diono® ensures compliance with US Federal Motor Vehicle Safety Standards (FMVSS), US National Highway Traffic Safety Administration (NHTSA), and Canadian Motor Vehicle Safety Standards (CMVSS), regularly testing all car seats.

All Diono® convertible car seats have a life span of 10 years, starting from when you purchase your seat. If the date of purchase cannot be determined then we use the date of manufacture.

Each Radian® is hand built by our manufacturing partners overseen by our highly trained quality control team.

Your Radian® is heavy as our engineers will never compromise on the intergity of the famous Diono Steel core. Since launch our reinforced automotive grade high strength steel core is the heart of our Radian, protecting generations of kids everyday.

Your Radian® 3R® has a low seat base because as your child grows, they will want to get in and out of your car themselves. This low height makes it very easy for them to get into their seat before you harness them up.

The seat sides on the base expand as your child grows. Parents and kids really love this feature on the Radian® 3R® as it makes travel so much easier

Videos & Installation

Rear Facing Install

 


Forward Facing Installation


Product Highlights

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 99685400124

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4.1 ★★★★★
Based on 27 reviews
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Product Reviews
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Verified Purchase
Larkus
Chelsea, US
★★★★★ 3
Dog loved, started to break down after 10 minutes.
Color: Hedgehog, Color: Hedgehog
I don’t know why it’s so difficult to find a quality teething toy that won’t begin to break down within (in this case) the first 10 minutes. I have a 17lb, 5 mos old Bernedoodle and she’d broken two pieces off the snout in 10 minutes and tried eating them. Yeah, yeah, they’d most likely pass - but this shouldn’t happen with a product specifically sold as a dog chew toy and listed for teething. On the plus side, she loves it - but I can’t obsessively monitor her every second of her teething either. Hit with the dog, frustrating for the ‘parent’.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
K
Verified Purchase
Kris B
Omaha, US
★★★★★ 5
Get this for your teething pup ASAP!!!
Color: Hedgehog
Immediately calmed my Bichon Frise puppy who is going through a tough teething & nipping phase ... None of the other teething toys were really engaging him, so as a result he would get restless and start biting at air, lol. This worked immediately at keeping him occupied and content. It also freezes great for him to cool his gums after a nap. Get this teether, you will not regreat it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
L
Verified Purchase
Lindap
Whiting, US
★★★★★ 4
Good for Teething puppies
Color: Teething Stick
After getting my fingers chewed and bitten by my new foster - 8 week old Yorkie , I was desperate to find good teething toys. Fortunately this one arrived quickly. Turned out to be very good for teething puppies! Charlie loves this cooling stick. Once it’s frozen, the cold really seems to soothe his sore gums. The icy part doesn’t stay frozen for long, but it works so well that I bought a second one to keep ready in the freezer while he’s working on the first. Even after it warmed up, he still enjoyed chewing on the soft stuffed part and the tentacles. The product card says not to use it as a chew toy, so supervision is a must, but it held up just fine so far. Overall, this has been a big help during the teething phase — short-lived when frozen, but very effective while it lasts! And worth every penny to save my fingers from being a chew toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 7, 2025
A
Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 5
Happy hound!
Color: Yellow, Color: Yellow
My 2 yr old bloodhound destroys every toy in minutes, but not this one. My husband and I actually buy toys to see how long they last for fun. Although the croc is NOT indestructible, it lasts a whole lot longer than most. After an hr or so, I took away the only piece he's chewed off which is part of the back leg. Otherwise nothing else is missing off the croc. Our boy has been very occupied with this new toy and we're satisfied with his new distraction!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
B
Verified Purchase
Baily Gravunder
Draper, US
★★★★★ 5
Definitely a tough toy
Color: Blue
This is one of the few toys my Boxer/american bulldog mix hasn’t been able to tear apart. He loves chewing on it and I love that he doesn’t chew on stuff he shouldn’t. I have such an issue with toys being torn apart the day I bring them home. I wish there was a safe way for it to have a squeaker since he loves squeakers but I don’t think that is possible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026

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