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radian® 3RX

the original 3 across All-in-One convertible car seat

radian® 3RX

The original All-in-One convertible car seat designed to fit 3 across and with our famous steel core inside for optimum safety. Now rear facing for even longer (up to 50lb/ 22.7 kg.) and featuring all new head support infant insert, expect 10 years of safety from just one car seat.

$269.99

 
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What makes radian® 3RX great?

10 YEARS ONE CAR SEAT

With 4 ways to travel from birth to booster, the radian® 3RX adapts as your child grows to offer a custom fit from birth up to 120lb / 54kg.

THE ORIGINAL 3 ACROSS
Built with our famous radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.
REAR-FACING FOR LONGER

Designed and engineered to keep your child rear facing even longer up to 50lb / 22.7kg (approx. 4 years old).

HEAD SUPPORT INFANT INSERT

The removable head support infant insert features padded support for cocooned comfort. Then as your infant grows simply remove.

STEEL CORE
Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect.
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 

With 4 ways to travel from birth to booster, radian® adapts as your child grows to offer a custom fit from birth up to 120 lb / 54 kg.

Built with our famous radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.

With extended rear-facing from birth up to 50 lb / 22.7 kg to keep your child in the safest travel position for as long as possible.

With 4 ways to travel from birth to booster, radian® adapts as your child grows to offer a custom fit from birth up to 120 lb / 54 kg.

Built with our famous radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.

With extended rear-facing from birth up to 50 lb / 22.7 kg to keep your child in the safest travel position for as long as possible.

Key product features and benefits

Steel Core
Mechanically engineered, reinforced steel core. Made from automotive grade high strength steel. What better way to protect your child?

Head support infant insert
The removable head support infant insert features padded support for cocooned comfort. Then as your infant grows simply remove.

Safety from all angles with side impact protection…
Aluminium reinforced sides and thick energy absorbing foam distributes crash forces.

Anti-slip XL harness pads
The 2020 radian® 3RX features all new XL hardness pads with anti-slip backing for extra comfort and safety.

Easy remove covers
Radian 3RX features easy to remove covers. So when the next journey gets messy, easily remove to machine wash

SuperLATCH™ installation
Our SuperLATCH™ system makes installation easy and super secure. An audible click lets you know when connectors are locked in safe.

Travel ready
Radian car seats are super portable and fold flat for easy travel. They are also FAA Approved and certified for use on aircraft!

Cup Holder included
radian 3RX includes a steel reinforced cup holder for those all important road trip drinks and snacks.

what’s the diono.com difference? 

Additional 2 year warranty*

Receive an additional 2-years warranty on all car seats and strollers purchased from diono.com. *T&C’s apply

FREE Shipping on orders over $200*

Diono proudly offers free shipping on orders over $200. *T&C’s apply

Join the Very Important Passenger Club

Unlock exclusive news, offers and discounts on all diono.com products.

1-2-1 Virtual Car Seat Fitting

Book a 1-2-1 virtual car seat fitting with a member of our car seat safety team

Questions?

can the radian 3RX fit-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.