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Diono Radian RXT Car Seat/Booster


The RadianRXT is a highly versatile car seat that could be the only seat you’ll ever need. It comfortably seats rear-facing children from 5-45 lbs, forward-facing children from 22-65 lbs in 5-point harness, then converts to a booster for children up to 120 lbs.

NOTE: We do not ship car seats.
They are only available for in store pick up.

This item is currently out of stock.

It’s built for strength and safety with a steel alloy frame, reinforced sidewalls, adjustable head support and our patented SafeStop® energy absorbing harness. EPS foam surrounds the child’s head and body to provide complete side impact protection. Our unique SuperLATCH system makes installation easy.

The RadianRXT is NCAP crash tested, the industry benchmark for verifying child seat performance in severe accident conditions, and the only car seat rated for LATCH use with a child up to 80 lbs. The RadianRXT sits low on a vehicle seat for easy child boarding, features memory foam padding and infant support pillows.

Expandable sides and a longer seat bottom provide extra room and comfort for your growing child. One cup holder is included, with the option to add up to 4 cup holders.

In addition to all this versatility, it folds flat for travel and storage, has a 10 year life and offers amazing safety, comfort and convenience your child won’t outgrow.


  • Rear-facing: 2.3 - 20.5 kg (5 - 45 lbs)
  • Forward-facing: 10 - 30 kg and up to 144cm (22 - 65 lbs and up to 57") in a 5-point harness
  • Booster 23 - 54 kg (50- 120 lbs)
  • Steel alloy frame and aluminum reinforced sides
  • Safestop® energy-absorbing harness system
  • Adjustable head support, reinforced for complete side impact safety
  • Energy-absorbing EPS foam panels on all sides
  • Rear-facing tether capability
  • UAS installation up to 30 kg (65 lb) child
  • Infant body support cushions
  • Memory foam padding for superior comfort
  • 5 shoulder and 3 buckle positions for custom fit
  • Expandable sides and longer seat bottom for leg support and comfort
  • 12 height positions for adjustable head support
  • 2 recline positions in forward-facing mode
  • Sits low on vehicle seat for easy child boarding
  • Fits 3 across in a mid-size vehicle and offers more shoulder space
  • Add up to 4 cup holders (1 included)
  • Folds flat for travel and storage
  • Rubber bottom grips for no-slip installation
  • 10 year life


Canadian Seat Capacity:
Rear-facing: 2.3 – 20.5 kg (5 – 45 lb)
Forward-facing: 10 – 29.5 kg (22 – 65 lb)
Booster: Up to 54 kg (120 lb)

Child Standing Height:
Up to 57 in (144 cm)

Product Weight:
26 lb (11.8 kg)

Product Dimensions:
Open:   28.5" H x 17” W x 16 " D (72.4 x 43 x 40.6 cm)
Folded:  28.5" H x 17” W x 10" D (72.4 x 43 x 25.4 cm)

Shoulder Width:
13 in (33 cm)

Harness Slot Heights:
9" to 18" (22.8 to 45.7 cm)

Buckle Strap Depth:
4" to 7.5" (10 to 19 cm)

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