Diono Radian 3 RXT All-in-One Convertible Car Seat - Grey Dark

Diono Radian 3 RXT All-in-One Convertible Car Seat - Grey Dark

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Available: In Stock
$239.99 $299.99
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Your child’s security is our top priority. We engineered our radian® 3rXT with premium, innovative features like a steel alloy frame, aluminum reinforced sidewalls, energy absorbing EPS foam and a reinforced adjustable head support to keep your little one protected and comfortable.


Your child’s security is our top priority. We engineered our radian® 3rXT with premium, innovative features like a steel alloy frame, aluminum reinforced sidewalls, energy absorbing EPS foam and a reinforced adjustable head support to keep your little one protected and comfortable.

Extended rear-facing

The radian® 3rXT keeps children comfortably rear-facing from 5-45 pounds for the safest possible position. Premium, plush head and body support cushions are included for newborns and infants.

Room to grow

Accommodates forward-facing children up to 65 pounds in a 5-point harness and converts to booster mode for kids 50-120 pounds. The aluminum reinforced, adjustable head support and sidewalls provide additional side impact protection.

Worth the Weight

Our convertible car seats are made from steel for safety you can feel. The fully integrated steel frame is wrapped in thick engineered plastic to withstand severe crash forces. Deep, aluminum reinforced sidewalls provide excellent side impact protection, while energy absorbing EPS foam surrounds your.

  • Joy of the journey: From birth, keep your little one rear facing longer to 45 lbs traveling safely. As they grow to 120 lbs (12 years approx.) our long-range lifespan protects your child facing forwards. Peace of mind for you, we’ve thought of everything so you don’t have to.
  • Lovingly engineered: The radian® 3 rXT is fabricated using super strong automotive high strength steel, engineered into a dual spine. This unique core manages and dissipates energy and provides an unyielding structure to protect your baby. We shield your precious child through Super side impact protection with aluminium reinforcement.
  • Three’s not a crowd: For safety that fits 3 across the radian® 3 rXT packs all our innovative safety features into a sleek and slim design that allows you to fit three across (in most mid-size vehicles). Now the whole family can travel, together.
  • First Class comfort: Inspired by the best European fashions, our radian® 3 rXT has soft fabric covers and a memory foam seat base bottom. Lined with thick energy absorbing foam, comfort and safety go hand in hand. A tailored infant support cushion and a cup holder are included.
  • Made of Seattle: We are from Seattle, a city where being different is the norm and so is the radian® 3 rXT. It folds flat, so you can travel the world and is FAA approved for use on an aircraft. You don’t need to change just because baby is in tow.

Your child’s security is our top priority. We engineered our radian® 3rXT with premium, innovative features like a steel alloy frame, aluminum reinforced sidewalls, energy absorbing EPS foam and a reinforced adjustable head support to keep your little one protected and comfortable.


Your child’s security is our top priority. We engineered our radian® 3rXT with premium, innovative features like a steel alloy frame, aluminum reinforced sidewalls, energy absorbing EPS foam and a reinforced adjustable head support to keep your little one protected and comfortable.

Extended rear-facing

The radian® 3rXT keeps children comfortably rear-facing from 5-45 pounds for the safest possible position. Premium, plush head and body support cushions are included for newborns and infants.

Room to grow

Accommodates forward-facing children up to 65 pounds in a 5-point harness and converts to booster mode for kids 50-120 pounds. The aluminum reinforced, adjustable head support and sidewalls provide additional side impact protection.

Worth the Weight

Our convertible car seats are made from steel for safety you can feel. The fully integrated steel frame is wrapped in thick engineered plastic to withstand severe crash forces. Deep, aluminum reinforced sidewalls provide excellent side impact protection, while energy absorbing EPS foam surrounds your.

  • Joy of the journey: From birth, keep your little one rear facing longer to 45 lbs traveling safely. As they grow to 120 lbs (12 years approx.) our long-range lifespan protects your child facing forwards. Peace of mind for you, we’ve thought of everything so you don’t have to.
  • Lovingly engineered: The radian® 3 rXT is fabricated using super strong automotive high strength steel, engineered into a dual spine. This unique core manages and dissipates energy and provides an unyielding structure to protect your baby. We shield your precious child through Super side impact protection with aluminium reinforcement.
  • Three’s not a crowd: For safety that fits 3 across the radian® 3 rXT packs all our innovative safety features into a sleek and slim design that allows you to fit three across (in most mid-size vehicles). Now the whole family can travel, together.
  • First Class comfort: Inspired by the best European fashions, our radian® 3 rXT has soft fabric covers and a memory foam seat base bottom. Lined with thick energy absorbing foam, comfort and safety go hand in hand. A tailored infant support cushion and a cup holder are included.
  • Made of Seattle: We are from Seattle, a city where being different is the norm and so is the radian® 3 rXT. It folds flat, so you can travel the world and is FAA approved for use on an aircraft. You don’t need to change just because baby is in tow.

Free Shipping
Free shipping applies to addresses within the Contiguous US. Please feel free to request a shipping quote to PR, HI, AK, GU, APO and FPO.

Shipping Policy
Most orders received before 2:00 P.M. EST will usually ship the same business day. Most baby products ship from our Baltimore, MD warehouse. 

Return Policy
All items must be returned within 30 days from the date of purchase and with all of their original packaging and please remember that returned items must be brand new and completely unused. If your item was shipped to you inside a shipping carton or bag, it must be returned in the same fashion. Once received, we will refund your payment in full. Items which are returned not in new condition or have been assembled and need to be repackaged may be subject to a restocking fee or in some cases, may not be returnable. Items which are defective within 30 days from the date of purchase may be returned once approved by our customer service personnel. Should you need to return your item please be sure to request a return authorization prior to returning to us. Health and Hygiene products are not retunable by law. Please feel free to email us with any questions you may have at service@capitalkidz.com.