Diono Radian 3R, All-in-One Convertible Car Seat, Rear and Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Black Storm
Condition: New
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FREE 90-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Thursday, Nov 5
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At a glance
- Condition
- New
- Color
- Black Storm
- Dimensions
- 16.1"D x 16.9"W x 28.4"H
- Weight
- 24 lb
- Age Range Description
- Kid
- Installation Type
- Latch
- Orientation
- Convertible Seat
Features 5
- Includes Comfort Travel Kit featuring complimentary colored head support pillow, comfort cushion and 2 XL cup holders.
- 10 Years One Car Seat - from Birth to Booster (5 - 120 lb) it's all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat!
- Rear Facing for Longer - lovingly engineered to keep your child rear-facing up to 50 lb.
- Fits 3-Across - our famous slim-fit design with zero compromises to safety, space, or comfort.
- Mechanically engineered from reinforced automotive grade high-strength steel, our unique core shell shields and protects your child.
Specs 27
| Maximum Weight Recommendation | 120 pounds |
|---|---|
| Minimum Height Recommendation | 18.1 inches |
| Minimum Weight Recommendation | 5 pounds |
| Maximum Height Recommended | 57.1 inches |
| Rear Facing Maximum Weight | 50 pounds |
| Forward Facing Maximum Weight | 120 pounds |
| Rear Facing Minimum Weight | 5 pounds |
| Forward Facing Minimum Weight | 26.5 pounds |
| Forward Facing Car Seat Minimum Height | 29.9 inches |
| Rear Facing Car Seat Maximum Height | 44.1 inches |
| Brand | Diono |
| Age Range Description | Kid |
| Infant Toddler Car Seat Type | Convertible Car Seat |
| UPC | 677726506408 |
| Manufacturer | Diono |
| Unit Count | 1 Count |
| Number of Packs | 1 |
| Model Number | 50640 |
| Part Number | 50640 |
| Installation Type | Latch |
| Orientation | Convertible Seat |
| Harness Type | 5-Point |
| Number of Height Positions | 1 |
| Item Dimensions D x W x H | 16.1"D x 16.9"W x 28.4"H |
| Item Weight | 24 pounds |
| Material Type | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Color | Black Storm |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Nov 5
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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Magenta is beautiful, kids love these car seats
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Had it for about 2 months. This radiant pink is beautiful! My toddler loves it too. It was more difficult to install it rear facing so ended up setting it up forward facing. Instructions aren’t super easy to follow, nor the installation process. Lucky for me husband got it figured out. Removability: Haven’t removed it yet since the day it was installed so can’t speak to that. It fits great and gives plenty of space for children to move around when not buckled in. Based on my children’s unspoken review (I can tell they love sitting in it and enjoy being able to see through the window), I would definitely recommend other parents to get it. There isn’t much side padding like impact safety that other car seats have but it doesn’t bother me since it’s certified for safety. My 3 year old can unbuckle the top part himself. The buckle design is durable and yet comfortable. Haven’t seen any marks on the neck from the harness rubbing against their body. I think it’s great! I hope it will last for a long time as advertised.
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Reviewed in the United States on May 5, 2026 by Sergey Gilgof
Would definitely recommend for tight vehicles
Color: Blue Surge
Yes, this car seat is heavy, but it’s not bulky like other heavy car seats! I bought this for my special needs son who is very small for his age but wants to feel more independent like big brother. I love that the slimmer fit allows him to get in the car by himself and just wait for me to buckle. I also love that the buckle are a little bit either to push than other car seats, but still difficult enough I don’t have to worry about him getting out. Install was not a difficult as some people had said, but that might be because I change cars a lot so I’m used to moving the seats.
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Reviewed in the United States on May 14, 2026 by Courtney
Not bad
Color: Black Storm
Be mindful there isn’t much head support on the sides. We have trouble getting the cup holders to stay in. Good quality seat so far! Easy to install
Reviewed in the United States on August 8, 2026 by Meghan
Amazing slim seat
Color: Pink Cotton Candy
Came in the next day after I ordered it, and we really love this seat. My daughter really wanted a pink seat to replace her red one that was damaged in the move. Although the seat is slim it is a little heavy.
Reviewed in the United States on July 31, 2026 by Erica S.
As shown. Very sturdy.
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I am very happy with this car seat. I had trouble with cupholders but made it work. Everything else is great. Safe and sturdy.
Reviewed in the United States on July 14, 2026 by Amazon Customer
Jeep Gladistor
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With a third baby coming and my husband driving a Jeep Galdiator, I knew our 2 Graco ones and the Nuna car seat were not gonna fit. THANK GOODNESS for these Diono’s! And the safety features are just as good as all the other fancy brands. Bought two of these and the Nuna fits perfect.
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Granddaughter gave it her approval.
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