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Diono

Diono Radian 3R SafePlus, All-in-One Convertible Car Seat, Rear and Forward Facing, SafePlus Engineering, 10 Years 1 Car Seat, Slim Fit 3 Across, Purple Wildberry

Based on 6,854 reviews
Condition: New
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$259.99
Save $140.00 was $399.99

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At a glance

Condition
New
Style
Radian 3R SafePlus Fits 3 Across
Color
Purple Wildberry
Dimensions
16 x 17 x 28.5 in
Weight
29.3 lb
Installation Type
Latch
Orientation
Convertible Seat

Features 6

  • 10 Years One Car Seat - from Birth to Booster (4 - 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, with SafePlus Engineering.
  • Fits 3-Across - our famous slim-fit design with SafePlus 6-layer side impact protection 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 24

Brand Diono
Installation Type Latch
Material Polypropylene, Alloy Steel, Plastic, Polystyrene
Color Purple Wildberry
Orientation Convertible Seat
Product Dimensions 16 x 17 x 28.5 inches
Item model number 50636
Minimum weight recommendation 4 Pounds

Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

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.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

Excellent safety features for a tall 7-year old boy. Almost the only model on the market that fits.
Style: Radian 3R SafePlus Fits 3 Across Color: Black Jet
I would give this 4.5 stars if I could. It is one of the only seats that will fit my tall 7-year old boy that has a multi-point harness. It also has enhanced support for the head and neck (again, one of the only such models on the market that will fit a tall 7-year old). I say 4.5 instead of 5 because at least in a Tesla Model Y, it is impossible to get this seat 100% tight and immobile. That's a bit annoying and different from the baby / toddler seat I had before. However, compared to the standard issue "booster seat" that my boy could legally use, I am convinced that this provides much better protection even with a bit of "wiggle." ... show more
Reviewed in the United States on May 27, 2025 by CAAmazoner
Safe, affordable, & comfort all in one!!!
Style: Radian 3R SafePlus Fits 3 Across Color: Black Jet
Review Image by Darlene Darlene
Great car seat! It’s sturdy & very sheik I love the easy cleaning fabric it has, it is very heavy which makes me feel like my baby is safe in it! It’s got adjustable shoulder straps & head rest adjustments as well so it can grow with your baby. The seat part also has side adjustments so it can be narrow or wider which is a neat feature! I won’t be using it for travel but it folds up and could be easy to transport if you can carry the heavy weight of it. For the price of this car seat it was a steal!!! We spent double on a Gracie brand before and i feel this car seat is much safer, it’s also roll over tested which is great because not many car seats have that. I will say the cup holders are terrible they fall out very easily but I rather my kid be safe than have a cup holder!!! I was able to fit 2 of these car seats in with a Doona in my Ford Escape 2018 which was suppose to be impossible but the fact of how compact it is made it possible, my boys also say it’s very comfortable which is a huge bonus! Definitely a must buy car seat!!! ... show more
Reviewed in the United States on April 22, 2025 by Darlene Darlene
3 in a row with infant seat
Style: Radian 3R Fits 3 Across Color: Black Storm
Review Image by Katelyn plants Katelyn plants
I have a 2022 kia Sorrento and I’m about to be a mom of 3under 4 and I really wanted all my kids in the middle row but I was able to with the Graco slim fits and the infant car seat as while but it fits great with a little room to spare to!
Reviewed in the United States on June 5, 2025 by Katelyn plants Katelyn plants
Perfect for multiple kids in a smaller vehicle
Style: Radian 3R Fits 3 Across Color: Black Jet
Easy to install, fits 3 across in our mid-size suv, very comfortable for long rides for our kids, a little on the heavy side but that comes with a durable car seat. Colors are what we ordered. Easy to clean. Easy to adjust straps.
Reviewed in the United States on May 26, 2025 by Mason
Fits in small cars.
Amazing car seats! Fit 3 in an Elantra! High quality
Reviewed in the United States on May 27, 2025 by Brendan Harris
Sleek look
Style: Radian 3R Fits 3 Across Color: Black Jet
Car seat is very heavy. Simple to install looks sleek in the car it says convenient for travel but with how heavy it is I don’t agree at all. I couldn’t imagine traveling with this!
Reviewed in the United States on May 13, 2025 by Julia
Very very sturdy and strong probably one of the best on the market
Love the seats after having a car accident we decided to go for a much stronger and sturdier seat and this came in at top of the list they fold nice and flat for traveling on planes and things but just be prepared they are very very very heavy so would be hard to carry around a airport with child in arms also a little hard to instal but well worth it in the end love all the cool colors u can also choose from ... show more
Reviewed in the United States on March 27, 2025 by olivia robert
Fits 2 in a row with additional infant seat in Toyota Camry!
Style: Radian 3R Fits 3 Across Color: Black Jet
We bought 2 of these to fit in the backseat of our 2010 Toyota Camry. 1 rear facing, middle forward facing, next to infant (Uppababy Mesa) seat. Middle forward facing was the only way it would fit. Pro’s: slim, sturdy, easy for our kids to get into themselves, latch system is easy/works well. Good customer service from Diono. Our first one didn’t have the rear-facing piece in the box. Cons: * Very heavy! * Tall backside. Check your car seat manual whether a car seat is allowed to touch/rest against the front seat (if rear facing). Now having moved one to the middle back seat (forward facing) on our Honda Odyssey, it sits higher and blocks the rearview a bit. Wasn’t an issue in the Camry. No cupholders- fine, since that wouldn’t fit anyway. Not as much padding, so perhaps less comfortable, but both our kids are fine in them. Overal conclusion: great car seat if you have a tight back seat! ... show more
Reviewed in the United States on February 12, 2025 by Esther
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