SKU: 49296820366
maxi cosi vs diono

maxi cosi vs diono DIONO Radian 3 RXT All-in-One Convertible Car Seat (2020 Edition)

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Description

maxi cosi vs diono DIONO Radian 3 RXT All-in-One Convertible Car Seat (2020 Edition)The Diono radian 3RXT is the original 3 across All in One convertible car seat, trusted by over a million parents to protect their child from birth to booster (5 120 lbs 2. 3 54 kg). Lovingly engineered with the famous Diono steel core and now rear facing for even longer. Expect 10 years of safety from just one car seat! DIONO Radian 3 RXT All in One Convertible Car Seat 2020 Features: Rear facing for longer Now up to 50lbs 22. 7 kg Improved Fabrics

The Diono radian® 3RXT is the original 3 across All-in-One convertible car seat, trusted by over a million parents to protect their child from birth to booster (5-120 lbs / 2.3-54 kg). Lovingly engineered with the famous Diono steel core and now rear-facing for even longer. Expect 10 years of safety from just one car seat!

DIONO Radian 3 RXT All-in-One Convertible Car Seat 2020 Features:

Rear-facing for longer

Now up to 50lbs / 22.7 kg

Improved Fabrics

New and updated fabrics that are easy to remove and wash.

Positioning Liner

New 2-in-1 infant positioning liner that is removable as child grows

Newborn Wedge

Integrated newborn travel high wedge creates near lie-flat travel position

 

Car Seat Installation:


Product Specs:

Rear-facing
5-50 lbs / 2.3-22.7 kg

Forward-facing
22-65 lbs / 10-29.5 kg

Booster mode
40-120 lbs / 18-54 kg

Seated torso height
7.5-16.5″ / 19-42 cm

Overall maximum height
up to 57″ / 144.8 cm

Weight
26.4 lbs / 11.97 kg

Care and Maintenance:

Cover machine washable at 86F/30C/Cold

DIONO Radian® 3RXT All-in-One Convertible Car Seat (2020 Edition)

Product Manual

Tips and Tricks:

Installation Tips

  • read the manual the comes with your car seat
  • read the vehicle manual
  • find a certified child passenger safety instructor or technician to help you and check your installations

 

Airline Use:

  • unfold the Diono car seat before boarding the plane and ask the flight attendant for seat belt extenders
  • make sure to install the car seat next to the window so passengers can get by in case of an emergency
  • make sure to take the slack out of the seat belt extender before connecting to the airplane seatbelt

Rear Facing Installation:

  • first secure the detachable base and slide in the locking mechanism
  • adjust the harness to be the proper height for rear facing
  • adjust the head support to fit your child properly

Folding and Unfolding:

  • to unfold: lay the car seat down on a stable flat surface and undo the velcro strap, tuck it in behind the fabric and open seat until clicked and locked.
  • to fold: remove the red velcro strap from behind the fabric and loosen up the harness as much as possible so they are at the top of the car seat. release the lever at the bottom of the car seat and push seat inward - secure the top with the red velcro strap.

 

Right For Newborn:

  • whether you buy an infant only car seat or an all-in-one convertible car seat, both car seats have to meet the same standard
  • seats like the Diono all-in-one convertible car seats come with an infant cushion insert to properly fit your child in the harness
  • all-in-one convertibles are more economical - they have a lot of room for growth for your growing child

FAQ's:

can the radian 3RXT fit 3-across in my car?

Most likely, yes, as long as you have 51” (129.6cm) in the back row from vehicle armrest to armrest. It may be necessary to install all three using the vehicle seat belt system.

can the harness straps be cleaned?

Yes, we recommend using a damp cloth with a solution of water and baking soda to wipe the straps clean. They cannot be saturated in any liquid, or they will need to be replaced. Replacement harness straps can be purchased on our website.

can I use the radian 3RXT from birth?

Yes, the weight limits on all our convertible car seats starts at 5lbs. The newborn must also meet a length requirement where the top of their shoulders reaches the lowest harness slot on the seat.

are the harness pads and buckle pads required on my seat?

Yes, they are required while your child is sitting in forward-facing. They are optional but recommended while sitting in rear-facing. The center buckle pad is required at all times.

See Entire Diono Collection

See Related Article: Best Car Seats of 2022

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: 49296820366

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Leigh Evans
Phoenix, US
★★★★★ 5
Fun for dogs
Color: Green/Alligator, Size: Small
Smaller than I expected, but the two little dogs love it! They love shaking it, making it squeak, tugging it against each other & chasing it when I throw it to fetch. They often sleep laying on it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
A
Verified Purchase
AngelKlein2275
Battle Creek, US
★★★★★ 3
WEIRD feature - requires a water bottle
Color: Cow, Size: Large
Cute, but buyer beware. Maybe the description said this, but who would think to read for this.... You have to insert an empty bottle (like an old water bottle) for it to make the crinkle noise. There is a velcro spot at the base where you can open it and insert the water bottle for the noise factor and your dogs entertainment. I've yet to do that, but feel like my dog is gonna figure out the velcro and get the bottle out in no time. Seems like a waste of money. I could just give her an empty water bottle without the toy for free.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2026
A
Verified Purchase
Alice
Lexington, US
★★★★★ 5
Best dog toy!
Color: Multicolor/Alligator & Wild Duck, Size: Medium, Color: Multicolor/Alligator & Wild Duck, Size: Medium
Best dog toy! Most dog toys lady maybe a week or less but this one has been going strong for almost 2 months. Both the squeekers still work on both toys i purchased. My vizsla loves ti squeek and carry it around. We added an empty water bottle in the pocket cavity for some extra fun! Yes, we are still on the same water bottle! Fantastic durability.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
A
Verified Purchase
Amy Jo
Draper, US
★★★★★ 3
Shows wear quickly
Color: Multicolor/Sheep & Cow, Size: Medium
These are cute but not holding up as well as I had hoped. Quality is ok and the Velcro has held up great. The fabric just isn’t as good as it could be. They are much larger than expected.
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Reviewed in the United States on April 28, 2026
R
Verified Purchase
Rachel
West Palm Beach, US
★★★★★ 5
Super Sturdy with hours of fun.
Color: Wild Duck, Hare, Squirrel & Alligator, Size: Small
I got the small ones that you cannot put a water bottle in. These toys have held up way better than expected. I am dog sitting a very rough with toys dog named Chunk. He tears up ever. Single. Toy my dog (Ted) has. I bought new ones just for chunk. These appealed to me with the no stuffing, They were cheaper, and have a squeaker. Everything chunk needed. They arrived on time and I thought I wasted my money. They were super soft, like too soft. They felt flimsy and weak. Like 5 minutes with chunk and they be dead. 2 hours with my dog and they would have a rip. So far 2 of them (I set two out) have lasted the whole weekend. The bunny looks very rough and disgusting, but no rips, the squeakers still work, and no random fluff everywhere. I am going to wash the bunny once chunk leaves. My very careful doggo Ted loves them too. He throws them up in the air and catches them, plays tug of war with them, and no rips. They are super sturdy. He can’t wait until Chunk leaves (chunk is 2 and Ted is 12-13) so he can play with them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026

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