The ultimate 3 across All-in-One car seat from birth to booster (4 – 120 lb / 1.8 – 54 kg). Featuring 4 stages of complete newborn protection and all new Diono Safe+™ engineering to provide the next generation in car seat safety.
4 Stage Complete Complete Newborn Protection
Features Safe+ newborn travel high wedge, Safe+ newborn protection insert, Safe+ 2-in-1 infant positioning liner and Safe+ newborn harness pads to provide a custom fit from birth.
DIONO Safe+ Engineering
radian 3QXT is subjected to a combination of the most rigorous crash tests; front, rear, and side impacts, and rollover test to make sure we have the safest seat possible.
10 Years 1 Car Seat
With 5 ways to travel from birth to booster, the radian 3QXT adapts as your child grows to offer a custom fit from birth up to 120 lb.
Rear-facing for Longer
Designed and engineered with all new Diono Safe+ protection. Now you can keep your child rear facing for even longer up to 50 lb (approx. 4 years old).
Slim-fit Design Fits 3 Across
Built with our famous radian slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.
Safe+ Newborn Protection Insert
Made from energy absorbing materials to support and protect. Super soft padding for extra newborn comfort. Simply remove as baby grows.
Safe+ Newborn Travel High Wedge
Creates near lie-flat travel position for newborns while reducing head slump and helping to keep airways open. Simply remove as baby grows.
Safe+ 2-in-1 Infant Positioning Liner
Gives extra infant comfort and toddler body support. Simply remove as baby grows.
Safe+ Newborn Harness Pads
Small newborn harness pads for added safety and comfort.
Safe+ Steel Anti-Rebound Bar
One click connection to the seat base. Reduces rebound rotation by 50% in the event of a collision. Also provides more legroom when rear-facing.
Safe+ Engineering
The new radian 3QX is subjected to a combination of the most rigorous crash tests including rollover testing to make sure we have the safest seat possible.
Safe+ Engineering
The new radian 3QX is subjected to a combination of the most rigorous crash tests including rollover testing to make sure we have the safest seat possible.
Safe+ Headrest
Engineered with the latest European Side Impact technology to improve child head containment in the event of a collision. Headrest height is increased by 22% from radian R series
Specifications
- Rear-facing: 4-50 lbs / 1.8-22.7 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 inch / 19-42 cm
- Overall maximum height: up to 57 inch / 144.8 cm
- Weight: 25.8 lbs / 11.7 kg
Brand | Diono |
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Barcode | 677726512249 |
MPN | CS5122 |
Is on Sale | Yes |

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