null
Skip to main content
Cart 0
Your Bag
  1. Home
  2. Car Seats
  3. Radian® 3RXT

Radian® 3RXT

$329.99
$279.99
Award-winning Radian® 3RXT [Red Cherry]
Newborn travel high wedge [Red Cherry]
Rear-facing for longer up to 50 lbs [Red Cherry]
10 years one car seat [Red Cherry]
Famous Diono steel core [Red Cherry]
Rear-facing for longer up to 50 lbs [Red Cherry]
Original slim fit 3 across rear and forward-facing combination [Red Cherry]
Original slim fit 3 across design forward-facing [Red Cherry]
2-in-1 head and body insert [Red Cherry]
Side Impact Protection [Red Cherry]
Easy adjust 12 position headrest [Red Cherry]
FAA Approved folds for travel [Red Cherry]
New XL anti-slip harness pads [Red Cherry]
Expandable seat width [Red Cherry]
5-point harness [Red Cherry]
Award-winning Radian® 3RXT [Black Jet]
Newborn travel high wedge [Black Jet]
Rear-facing for longer up to 50 lbs [Black Jet]
10 Years One Car Seat [Black Jet]
Diono famous steel core [Black Jet]
Rear-facing for longer up to 50 lbs [Black Jet]
Original slim fit 3 across rear and forward-facing combination [Black Jet]
Original slim fit 3 across design forward-facing [Black Jet]
2-in-1 head and body insert [Black Jet]
Side Impact Protection [Black Jet]
Easy adjust 12 position headrest [Black Jet]
FAA Approved folds for travel [Black Jet]
New XL anti-slip harness pads [Black Jet]
Expandable seat width [Black Jet]
5-point harness [Black Jet]
Award-winning Radian® 3RXT [Blue Sky]
Newborn travel high wedge [Blue Sky]
Rear-facing for longer up to 50 lbs [Blue Sky]
10 Years One Car Seat [Blue Sky]
Diono famous steel core [Blue Sky]
Rear-facing for longer up to 50 lbs [Blue Sky]
Original slim fit 3 across rear and forward-facing combination [Blue Sky]
Original slim fit 3 across design forward-facing [Blue Sky]
2-in-1 head and body insert [Blue Sky]
Side Impact Protection [Blue Sky]
Easy adjust 12 position headrest [Blue Sky]
FAA Approved folds for travel [Blue Sky]
New XL anti-slip harness pads [Blue Sky]
Expandable seat width [Blue Sky]
5-point harness [Blue Sky]
Award-winning Radian® 3RXT [Purple Plum]
Newborn travel high wedge [Purple Plum]
Rear-facing for longer up to 50 lbs [Purple Plum]
10 Years One Car Seat [Purple Plum]
Diono famous steel core [Purple Plum]
Rear-facing for longer up to 50 lbs [Purple Plum]
Original slim fit 3 across rear and forward-facing combination [Purple Plum]
Original slim fit 3 across design forward-facing [Purple Plum]
2-in-1 head and body insert [Purple Plum]
Side Impact Protection [Purple Plum]
Easy adjust 12 position headrest [Purple Plum]
FAA Approved folds for travel [Purple Plum]
New XL anti-slip harness pads [Purple Plum]
Expandable seat width [Purple Plum]
5-point harness [Purple Plum]
Award-winning Radian® 3RXT [Gray Slate]
Newborn travel high wedge [Gray Slate]
Rear-facing for longer up to 50 lbs [Gray Slate]
10 Years One Car Seat [Gray Slate]
Diono famous steel core [Gray Slate]
Rear-facing for longer up to 50 lbs [Gray Slate]
Original slim fit 3 across rear and forward-facing combination [Gray Slate]
Original slim fit 3 across design forward-facing [Gray Slate]
2-in-1 head and body insert [Gray Slate]
Side Impact Protection [Gray Slate]
Easy adjust 12 position headrest [Gray Slate]
FAA Approved folds for travel [Gray Slate]
New XL anti-slip harness pads [Gray Slate]
Expandable seat width [Gray Slate]
5-point harness [Gray Slate]
Award-winning Radian® 3RXT [Red Cherry]

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


$329.99
$279.99
Klarna
or 4 interest-free payments of $70.00. Learn More
OR

Enjoy worry-free buying and perks with the Diono Difference

Recieve perks when you shop on diono.com

Additional 2-Year Warranty

Receive an additional 2-year warranty on all car seats and strollers purchased from diono.com

Free Shipping on orders over $300*

Diono proudly offers free shipping on orders over $300

Unlock exclusive offers & discounts

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.

* T & C's apply

Radian® 3RXT

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 lb) 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.

Features:

  • AWARD WINNING RADIAN ALL-IN-ONE CONVERTIBLE CAR SEAT - From infant to booster seat, rear and forward facing the radian® 3RXT adapts as your child grows for 10 years of use (5 - 120 lb).
  • REAR FACING FOR LONGER - Designed for safe rear facing travel from 5 - 50 lb complete with newborn travel high wedge to protect as they grow from baby, infant to toddler.
  • SLIM FIT DESIGN FOR 3 ACROSS - As your family grows, the slim fit design will fit 3 across in most vehicles without compromising child safety or passenger comfort.
  • ONE HAND EASY ADJUST 12 POSITION HEADREST - Creates a safe and comfortable fit for rear facing, forward facing and booster seat modes.
  • STEEL REINFORCED FRAME - Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect.

Product Specs

  • Minimum User Weight: 5 lb / 2.3 kg
  • Maximum User Weight: 120 lb / 54 kg
  • Minimum User Weight - Rear Facing: 5 lb / 2.3 kg
  • Maximum User Weight - Rear Facing: 50 lb / 22.7 kg
  • Maximum User Weight - Rear Facing LATCH: 35 lb / 15.8 kg
  • Minimum User Weight - Forward Facing: 22 lb / 10 kg
  • Maximum User Weight - Forward Facing: 65 lb / 29.5 kg
  • Maximum User Weight - Forward Facing LATCH: 40 lb / 18 kg
  • Minimum User Weight - Booster: 40 lb / 18 kg
  • Maximum User Weight - Booster: 120 lb / 54 kg
  • Maximum User Height: 57.1 in / 145 cm
  • Number of Head Support Positions: 12
  • Product Height: 28.5 in / 72.4 cm
  • Product Width: 17 in / 43.2 cm
  • Product Depth: 16 in / 40.6 cm
  • Seat Weight: 12.76 kg / 28.1 lb

Care & Maintenance

Covers: Machine wash cold, line dry. Shell and Components: Spot clean

Warranty Information

12 months standard warranty - extended to 36 months when you register with Diono® post purchase

Diono radian 3RXT Product Video

The Diono Difference

The Radian® R series features a unique combination of diono car seat engineering and rigorous testing.
Every Radian® All-in-One Convertible Car Seat is designed to adapt as your child grows to offer a custom fit from birth to booster (up to 120 lb.)
Built with our famous Radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.
Engineered to keep your child rear-facing for longer up to 50 lb / 22.7 kg.

Plays well with

Angle Adjuster Car Seat Leveler, Car Seat Wedge Cushion, Provides More Legroom For Rear-Facing Car Seats [Black]

Angle Adjuster

$19.99

Elevates All-in-One convertible car seats to a more upright position

Diono Sun Stop Rear Window Shade For Baby, Infant, Toddler, Rear-facing Car Seat Shade, Blocks Sun Glare UV Rays [Black]
Out of stock
Sun shades

Sun Stop®

$5.99

Protect rear-facing infants from direct sunlight

Customers Also loved

Radian® 3QXT All-in-one convertible car seat [Purple Plum]
Sale

Radian® 3QXT

$399.99
$349.99

The ultimate 3 across All-in-One car seat from birth to booster.

Radian® 3R all-in-one convertible car seat [Blue Sky]

Radian® 3R

$199.99

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

Radian® 3QX all-in-one convertible car seat [Blue Sky]
Sale

Radian® 3QX

$369.99
$319.99

The advanced 3 across All-in-One car seat from birth to booster.

Angle Adjuster Car Seat Leveler, Car Seat Wedge Cushion, Provides More Legroom For Rear-Facing Car Seats [Black]

Angle Adjuster

$19.99

Elevates All-in-One convertible car seats to a more upright position

Reviews