DIONO Radian 3RX Latch All in One Convertible Car Seat

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  • $249.99
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The Radian® 3 RX is lovingly engineered with a full steel frame and aluminum reinforced sides to maximize protection and has been designed to fit your lifestyle. The unique superlatch™ system makes installation quick and easy and the memory foam cushioning, padded harness and specifically angled cup holder help to keep your little one happy on life’s short or long journeys.

Your little one will remain secure and comfortable with added support cushions and plenty of room to grow. We aim to keep your little one happy wherever life takes you. We’ve thought of everything so you don’t have to.

Product Specs:

5-40 lbs / 2.3-18.1 kg

20-65 lbs / 9.1-29.5 kg

Booster mode
50-120 lbs / 22.7-45.4 kg

Seated torso height
8.25-17″ / 21-43.2 cm

Overall maximum height
up to 57″ / 144.8 cm

Care and Maintenance:

Cover machine washable at 86F/30C/Cold


DIONO Radian® 3RX Latch All in One Convertible Download Manual


Why Parents Chose Me:

Rear Facing For Longer:

Allows children to sit safely rear-facing from 5 – 40lbs (44″ in height).

Diono rear-facing for longer - ANB Baby

All Aboard:

Low sitting profile makes it easy for your child to climb in and out of their seat as they grow.

Diono all aboard - ANB Baby

Proper Fit:

Secure the littlest bundles of joy in our premium head and body support – for their very first journey out in the world.


Diono Proper Fit - ANB Baby


Stylish and Snug:

Modern, versatile cover in soft, premium fabric for a comfortable ride everyday – it’s absorbent, easy to remove and machine washable too!

Diono stylish and snug - ANB Baby

Tips and Tricks:

Airline Use


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.



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

Most likely, yes, as long as you have 51″ (129.6 cm) 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 3RX 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.

can the memory foam be washed?

Yes, it can be hand washed in cold water and air dried.

what are the requirements to use the seat in booster mode?

The child must weight at least 50lbs and be at least 40 inches tall.

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