Diono Radian RXT Convertible Car Seat

Diono Radian RXT Convertible Car Seat
Safety Features
Ease of Use
Value for Money
Overall Rating

The Diono Radian RXT Convertible Car Seat is one of the new generation of multipurpose car seats able to be used in rear-facing, forward facing and as a booster.

If you were to purchase a good quality infant carrier seat, car seat and booster seat separately it would cost you anywhere from $500 up to $800 – a not inconsiderable amount of money.

While every parent/guardian would want the very best, safest and most secure car seats available for their children, most people would not be able to afford that sort of money.

This is where the Diono Radian range of convertible car seats comes into their own – their design is quite ingenious, making the Diono Radian RXT Convertible quite possibly the only car seat you would need as you will be able to use it in each capacity longer than the competitors!

Diono Radian RXT Convertible Car SeatThe seat can be used as a rear facing seat for your newborn until they reach 45 lbs (20.5 kg), ensuring that your child remains as safe as possible for longer – perhaps even longer than the newest car seat safety recommendations from the AAP (depending on the weight of your child).

Once your child reaches the maximum recommended rear-facing weight of 45 lbs (20.5 kg), the Diono Radian RXT can easily be installed in a forward-facing position with a 5-point harness, capable of safely securing a child up to an incredible 80 lbs (36 kg)!

Finally, the car seat can then be transformed into a booster capable of safely securing a child from 50 lbs (23 kg)up to a weight of 120 lbs (54 kg), after which the child should be able to safely move into a full seat belt.

The Diono Radian RXT features five different shoulder harness strap positions and three different harness buckle positions, all of which are clearly shown and explained in the accompanying manual. Moving the straps to different positions was very straight forward and easy.

More Details

The side-impact protection is top class, with the adjustable, reinforced head support offering 12 height settings – which means it can provide maximum side-impact protection for your child as they grow.


The neck/shoulder cushions are also soft and will provide maximum comfort for your little one, while still providing maximum protection.

Diono Radian RXT Convertible Car SeatThe design of this car seat allows you to fold it for transportation or storage (page 10-12 of the instruction manual). The Diono Radian RXT does come with a padded shoulder strap for carrying, but at 26 lbs due to its steel frame, it is recommended that you buy another strap in order to carry it backpack-style if you intend to carry it. Alternatively you could purchase a Radian Portable Car Seat Travel Bag.

The Diono Radian RXT Convertible Car Seat is FAA-approved for use in aircraft and since the Radian seats are some of the narrowest on the market, you won’t have any problems fitting one in a plane seat.

However, do remember that it can only be used with the harness on the plane since belt-positioning booster seats cannot be used on planes.

Tip: Make a copy of page 28 of the instruction manual and take it with you to ensure you can correctly install the seat on the plane.


  • Full steel frame and aluminum reinforced sides for unmatched safety
  • Comfortably seats rear-facing children from 5-45 lbs, forward-facing children from 20 – 80 lbs in a 5-point harness, then converts to a booster for children up to 120 lbs.
  • Unique SuperLATCH system that makes installation easy
  • It also fits 3 across in a mid-size vehicle, folds flat for travel and is FAA certified
  • Booster mode from 50 – 120 lbs (40 to 57 inches)
  • NCAP crash tested, the industry benchmark for verifying child seat performance in severe accident condition
  • Diono Radian RXT Folded
    Infant body support cushions and memory foam for added comfort
  • Energy absorbing EPS foam and side impact protection provides added safety
  • Safestop® energy-absorbing harness
  • Additional forward-facing recline position to accommodate different types of contoured vehicle seats, 12-position adjustable headrest, 5 shoulder and 3 buckle positions deliver a comfortable ride.
  • Rear-facing tether capability
  • LATCH installation up to 80 lbs
  • Expandable sides and long seat bottom allow proper leg support
  • Low-sitting profile makes it easy for your child to board
  • Angled cup holder keeps a variety of drinks upright and within easy reach
  • Cover is machine washable and dryable
  • Rubber bottom grips for no-slip installation
  • 10 year life

The Diono Radian RXT Convertible Car Seat is a solid well-made convertible car seat with great versatility. Its high height and weight limits can accommodate big kids both rear and forward-facing, yet it takes up less space than many of its competitors. Features like full steel frame, superLATCH, EPS side impact protection, Safestop® and thick cushioning make the Diono Radian RXT a solid buy.

Add To Cart

Or Check Out Diono Radian RXT Convertible Car Seat on eBay:

Diono Radian rXT Convertible Car Seat 2016
  • Current Price: $199.98
  • Ends: Aug 17, 2018 21:49:40 UTC
Diono Radian Rxt Infant Insert Headrest Purple
  • Current Price: $5.00
  • Ends: Jul 23, 2018 0:10:01 UTC