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Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black

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Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
Diono® radian® 3QXT Ultimate 3 Across All-in-One Convertible Car Seat in Black. View a larger version of this product image.
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$449.99
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details

highlights

about the product

The ultimate 3 across All-in-One car seat from birth to booster. Features 4 stages of complete newborn protection and all new Diono Safe+™ engineering to provide the next generation in car seat safety.
  • 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 mode:
    • Supports children up to 44" tall
    • Supports children from 4 lb. to 50 lb.
  • Forward facing with harness mode:
    • Supports children up to 57" tall
    • Supports children from 22 lb. to 65 lb.
  • High back belt booster mode:
    • Supports children from 44" to 57" tall
    • Supports children from 40 lb. to 120 lb.
  • 4 stage newborn protection:
    • Safe+™ newborn protection insert
    • Safe+™ newborn travel high wedge
    • Safe+™ 2-in-1 infant positioning liner
    • Safe+™ newborn harness pads for custom fit from birth
  • Keep your rear-facing child for longer with Diono Safe+™ protection; up to 50 lb
  • Safe+™ engineering radian® 3QX is subjected to a combination of the most rigorous crash tests
  • Built with radian® slim fit design to fit 3 across in most vehicles without compromising child or passenger comfort
  • Removable Safe+™ side impact management pod with 8 layers of interlocking energy-absorbing EPS/EPP foam, high density plastic and steel reinforcement combine to create ultimate side impact protection
  • Removable infant insert provides proper positioning and comfort
  • Slim fit design can fit 3 seats across in most vehicles
  • Safe+ anti slip harness pads
  • Safe+ 2-in-1 infant positioning liner
  • Safe+ steel anti-rebound bar for increased stability and reduced rebound rotation by up to 50%
  • Safe+ steel core frame
  • Safe+ easy adjustable position headrest
  • Comfort+ memory foam cushion and expandable sides
  • Folds flat
  • FAA-certified: convenient fold flat seat for aircraft use to take on trips
  • Superlatch™ connectors offers easy click installation system
  • Steel reinforced cup holder
  • Machine washable removable covers
  • Measures 16" D x 17" W x 28" H
  • Weighs 25.8 lb.
  • Certified for use in aircraft (harness mode only)
  • 2-year limited manufacturer's warranty
  • Imported
  • Model 51220 Black; 51221 Grey; 51223 Red; 51224 Blue; 51225 Purple; 51226 Yellow
  • skuId: 69524470

features

Number of Recline Positions
"Seat tilting adjustments dependent on size and comfort of child"
1
Number of Head Rest Positions
12
Car Seat Installation Type
LATCH system
Car Seat Harness Features
One-pull harness tightening/loosening
Car Seat Features
Side impact protection
Car Seat Comfort Features
Adjustable head support
Part or Model Number
51225, 51220, 51226, 51221, 51224, 51223
Warranty
2 year limited warranty

specifications

Color
PURPLE, BLACK, YELLOW, GREY, BLUE, RED
Product Depth in
11.5
Product Width in
17
Product Height in
28.5
Rear Facing Maximum Weight Capacity lb
50
Rear Facing Minimum Weight Capacity lb
4
Rear Facing Maximum Height Capacity in
44
Maximum Car Seat Height in
57
Minimum Car Seat Height in
1
Forward Facing Maximum Height Capacity in
57
Forward Facing Minimum Height Capacity in
44
Forward Facing Maximum Weight Capacity lb
65
Forward Facing Minimum Weight Capacity lb
40

Accessories

accessories

shipping & returns

Please be aware we've temporarily extended our delivery time frames due to Covid 19 precautions at our facilities. The extended time frames will be reflected in the estimated delivery date shown at checkout.

Free Standard Shipping on Orders Over $39

Free Standard Shipping with any online purchase of $39 (merchandise subtotal excludes store pick up items; merchandise subtotal is calculated before sales tax, before gift wrap charges, and after any discounts or coupons). Truck delivery and shipping surcharges on over-sized or extremely heavy items will still apply (these charges are indicated on the appropriate product information pages and will be displayed in the shipping subtotal of your order). Orders typically arrive within 3-6 business days. Items shipped directly from the vendor or to Alaska and Hawaii have longer delivery lead times. This offer does not apply to Alaska, Hawaii, Puerto Rico or Business Direct orders.

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Ratings & Reviews

Ratings Snapshot

3.8846153846153846
22 reviews ·

Would Recommend

11 recommendations

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13
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4

Quality

Value

Features

Ease of Use

Style

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Customer Reviews

Showing 8 out of 22 reviews

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Comfy and high quality Meghan H ·
Recommended Not Recommended

This is our second Diono purchase and we are so impressed with the quality. As with any Diono, the install isn’t the simplest but we do not switch our seats often. We have installed this in a Subaru Outback and Audi Etron SUV with the angle adjuster for rear facing. The rear facing visibility in both is much more limited than the Diono 3RXT because of the side supports, but feels like it has much more protection for side impact.


5

Features

Ease of Use

5

Style


Terrible seat. BB&B Customer ·
Recommended Not Recommended

I bought two of these seats with high expectations and it failed. The clips feel cheap and although the frame is super solid I don’t trust the clips. The latch system is very hard to use, because it’s impossible to tighten so good luck having this properly installed so it doesn’t move side to side. The harness is constant getting tangled and the angle for forward facing is awkward. My toddler needs to scoot alll the way back in order for me to buckle him in, and even then he says don’t pinch me because the buckle is too close to the crotch area. Yes it comes with the padded buckle thing but it’s removable and because it’s so far back it’s hard to use with the pad us your kid is wearing pants. As for rear seating that bar is ok but sometimes the baby puts her feet behind it. In a crash it could hurt her feet. It looks super duper in the pictures but the fabric is cheap and most of the padding only applies to the newborn/baby stage. If your kid is older than 9M it’ just gets less and less padded. This seat is also very tall so to do rear facing you will need to move your seat foward to the point where it’s ridiculous. No I don’t recommend this purchase. But I will say they are narrow seats and you can definitely fit three in a row.


Safety concern- do not buy FCLoya ·
Recommended Not Recommended

We purchased this for our twins. We loved it at first. However, when it came time to change to forward facing, the steel connector for the back tether broke. My husband tugged it and it will not go back in. We read and watch information videos on how the steel part in the back can come off but is supposed to snap back in. This is the only thing holding the back of the car seat to the vehicle seat and it pops out! How is this supposed to keep our kids safe in the event of a car accident if the one thing that is supposed to keep it in place pops out! Horrible design and I fear for other families that have purchased this car seat.


1

Quality

1

Value

Hard to install TrRDiono ·
Recommended Not Recommended

A few friends were happy with this convertible and quite honestly this car seat was incredibly difficult to install. To the point that we returned it. And now waiting very long for the company to reimburse us. I wish I had known beforehand…



Exactly what I expected Jenesis ·
Recommended Not Recommended

The car seat is heavy (but if you’re shopping for a convertible you’re not looking light) heavy duty. I love it! I’ve bought two and although they are pricey l see it as an investment. I won’t need to buy another because my kiddo won’t grow out of it and it pretty much lasts til their 10. Feels safe, looks great, and you can fit 3 side by side. Perfect.



Skinny but hard to tighten....and loosen BB&B Customer ·
Recommended Not Recommended

Diono is THE brand to get if you have or plan to have multiple children in your car because you can fit 3 across. We have one child 1(3 mo) and are pregnant with our second. Twins run in our family so we went with Diono when we needed to switch from our infant seat, just in case. Plus, we like the flexibility of being able to fit another car seat or passenger in the car. We bought 3 - one for my car, my husband's car, and my parents since they regularly watch my son. In retrospect, we probably could've gotten away with two or even one, but it is a bit awkward to lift and switch into another car to reinstall. Let me start with the good, there is a roll bar and it is highly rated for safety, which gives me confidence in our son's safety, as does the side impact piece, although I'm not sure why there aren't two since it's recommended children are placed in the center seat. The neck support can adjust low enough for our 13-month old. It is a skinny (but deep) car seat. Installation is pretty easy. I am 5'4" and have a car, not an SUV,and it does fit in the back center seat without issue and I could likely move my seat back a bit more, although not much. When it was directly behind me I actually had to move up my seat a bit in order for it to fit. We've had it for about a month now (backward facing) and the biggest challenge we've seen is it's difficult to tighten to where it should be (only 2 fingers should fit under the seatbelt). If you have ever tightened a horse cinch, it feels a lot like this. Also, please note the release button is hidden under fabric...probably so older kids don't have easy access, however, it concerns us if there was an emergency, would first responders know how to get our child out? I also recommend using the shoulder pads, which make the seat harder to tighten, but protect from seatbelt burn and getting seatbelt marks on our son's neck, so it's a tradeoff. Some other "good to knows": The cup holder doesn't lock-in, so our inquisitive son pulls it out every time we use it. Our son does prefer this car seat over his infant seat, so it has eliminated most of the fights to get him buckled in for car rides, which is a win! All in all, if you are planning to have 3 kids across in your car a Diono Radian 3QXT is the right choice, just be ready to muscle it tight and spend a bit of time finding the hidden release button. Fingers crossed they improve on this in future iterations.



Safe but big! Ali and Dyl ·
Recommended Not Recommended

This car seat is very well made. It’s on the heavier side and definitely awkward to maneuver. (With the infant attachment) It’s simple to use though! If you are planning on having this seat rear facing and you have only a second row vehicle, be prepared for yourself or your passenger to be eating their knees! It’s so long that rear facing you have to put the front seat up a lot. I’m 5’3 and I just barely have enough room to be comfortably uncomfortable during a trip. As for the comfort, it’s very cozy. However because it’s so cozy with all the infant inserts the waist buckle can be a struggle to latch. It’s wide for an infant.



Purchased blue and received gray Shanna ·
Recommended Not Recommended

We purchased this car seat for our little on to put in my husband's vehicle after he did extensive research about what car seat he wanted. We have not been able to test the car seat with out little guy yet but the product was shipped super fast, better/faster than Amazon. The most disappointing reveal once we received it was that I purchased the blue car seat and received the gray one. I was ready to send it back but my husband didn't want to go through the hassle. When you pay this much for a car seat, or any product, you expect to at least get the color you paid for. He put the car seat together and was pleased with it. There is plenty of padding or cushion for the little one to keep him secure. My husband was very surprised when I told him that the baby could already go into the car seat as an infant. Once the car is good to go and carvseat installed. I will give an update, if possible, to my review.



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