Diono Radian 3R Car Seat product image (primary)
Child car seat with pink and red padded fabric upholstery, integrated five point harness with black straps and buckle, molded plastic base, two cup holders, and an embroidered 'diono' logo on the headrest.

Diono

Diono Radian 3R Car Seat (Pink Cotton Candy)

5/5 (50)
$131.99$219.99-40%
Out of Stock

The Diono Radian 3R is a 4-in-1 convertible car seat designed to fit 3 across in most vehicles, featuring a slim-fit design and an automotive-grade steel core for durability. It accommodates children from 5 to 120 lb in rear-facing, forward-facing, high-back booster, and backless booster modes, and it folds flat for travel with FAA approval. Based on user reviews, the rear-facing installation can be tight, and the harness height may cause some children to outgrow the forward-facing mode by height before reaching the weight limit.

Color
Pink Cotton Candy
Material
Reinforced automotive grade high-strength steel core shell, ComfortPlus Memory Foam
Gender
unisex
Style
slim-fit, travel-friendly

Color

Pink Cotton Candy
GTIN
677726506446
MPN
DIONO-677726506446-GENTLYUSED

Specifications

All-in-one convertible car seat designed for children from birth to booster, featuring a steel-reinforced core, memory foam comfort, and a slim profile that fits three across.

Grows with child from 5 to 120 lb; rear-facing up to 50 lb; 4 modes; foldable for travel; FAA approved; includes head support, comfort cushion, and cup holders.

Color
Pink Cotton Candy · pink
Material
Reinforced automotive grade high-strength steel core shell, ComfortPlus Memory Foam
Secondary
polyurethane
Style
slim-fit, travel-friendly
Gender
unisex
Age Group
kids
Condition
used

Additional Attributes

  • 10 Years One Car Seat from Birth to Booster (5-120 lb)
  • 4 modes in 1 seat: rear-facing, forward-facing, high-back booster, backless booster
  • Rear-facing up to 50 lb
  • Fits 3-across in most vehicles
  • Reinforced automotive grade high-strength steel core shell
  • ComfortPlus Memory Foam padding
  • Folds flat for travel or compact storage
  • FAA approved for airline use
  • Includes head support pillow, comfort cushion, and 2 XL cup holders (for Pink Cotton Candy color)
  • Slim-fit design for tight spaces

Image Analysis

7 images
Diono Radian 3R Car Seat product image (primary)
01high

Child car seat with pink and red padded fabric upholstery, integrated five point harness with black straps and buckle, molded plastic base, two cup holders, and an embroidered 'diono' logo on the headrest.

OCR: diono
pink fabric upholsterypadded headrest cushionadjustable shoulder harness strapsred fabric shoulder padsblack central buckleblack webbing strapscrotch strap padmolded plastic shell baseleft cup holderright cup holderinstruction safety label on sideembroidered 'diono' logo on headrestseat side impact wingscontoured seat cushionseam stitching detailsfront fabric storage flap with label
Diono Radian 3R Car Seat product image 2
02high

A pink padded child car seat with harness and two cup holders placed over a stylized city skyline at sunset featuring the Space Needle and a distant mountain.

OCR: diono
pink child car seatpadded headrestshoulder harnesscrotch buckleblack harness strapsadjustable shoulder padsseat cushionfabric upholsteryplastic shellcup holder leftcup holder rightdiono logoSeattle skylineSpace Needlemount rainiersunset skycity buildings silhouetteproduct isolated over backgroundpromotional composite
Diono Radian 3R Car Seat product image 3
03high

Three children seated in the rear of a car in three child car seats; the center child holds a plush pig and the right child wears a shoulder seat belt. Purple ambient lighting is visible in the panoramic roof area. Text '123 fits 3 across' appears at the lower right.

OCR: 123 fits 3 across
child car seat left blue fabric harnessedchild car seat center magenta fabric with 5-point bucklechild car seat right red fabric with lap shoulder beltboy seated left wearing dark blue shirt and light blue jeansgirl seated center holding plush pig toygirl seated right wearing white shirt with small red heart and blue jeansplush pig toy light pink and whiteseat belt shoulder strap across right passengerpadded headrestspanoramic sunroof with purple ambient lightingwhite interior headlinerrear bench seat white upholsterystudio or staged in-car lighting
Diono Radian 3R Car Seat product image 4
04high

Studio product shot of a pink child car seat placed beside a separate silver metal core frame, with the phrase 'automotive grade steel core' shown above.

OCR: automotive grade steel core. diono
pink child car seatpadded headrest cushionpadded side wingsfive-point harness strapsharness bucklechest cliptwo pink cup holdersmolded plastic basesoft fabric coversilver metal core framemetal mounting brackets with holesstudio white backgroundoverhead product shotbright even lightingvisible logo text on headrest
Diono Radian 3R Car Seat product image 5
05high

Four-image collage showing a closet with hanging clothes and bags, an open hatchback car trunk, a pink child car seat with exposed base, and an airplane cabin overhead bin open with a suitcase and an FAA Approved label.

OCR: diono. FAA Approved
closet with hanging clothesbeige coats and shirtswhite clothing hangersred handbagblack handbagwhite dressermetal shoe rackassorted shoeswooden floorpotted plant on dresseropen car trunkblack hatchback reardual exhaust pipesoutdoor parking lot backgroundchild car seat shell pinkcar seat base exposed undersideFAA Approved sticker with airplane iconairplane overhead bin opentan cabin seats visible
Diono Radian 3R Car Seat product image 6
06high

White graphic panel showing four black feature icons and labels for the 'Radian 3R': 2x cup holders, FAA approved, memory foam, and machine washable.

OCR: Radian 3R. 2x Cup Holders. FAA Approved. Memory Foam. Machine Washable
rounded square icon framescup silhouette with check mark badgeairplane silhouette with check mark badgefinger pressing memory foam illustrationwash tub with wavy water linesbold sans serif headline textsmall feature label texts under iconsmonochrome black icons on white backgroundeven studio lighting
Diono Radian 3R Car Seat product image 7
07high

Studio product image showing a pink Diono convertible child car seat from front and rear views with measurement labels.

OCR: Inside shoulder width 12" (30.5 cm). External width 16.9" (42.9 cm). Overall height 28.4" (72.1 cm). Inside hip width 12" (30.5 cm). Overall depth 16.1" (40.8 cm). Folded depth 8" (20.3 cm). Inside seat depth 13" (33 cm). 5 harness positions. Maximum harness shoulder height from seat 16.5" (42 cm). Minimum harness shoulder height from seat 7.5" (19 cm). Closest buckle slot 3.5" (8.9 cm). Furthest buckle slot 7.5" (19 cm). diono
pink convertible child car seatdetachable headrest cushionfive harness positions labeladjustable harness strapscentral bucklebuckle slotspadded seat inserthard plastic baserear access panel with mounting hardwareside warning labelbrand logo 'diono' on headreststudio white backgroundtwo-view composition front and rear

Brand PDP Lookup

Brand
Diono

Radian® 3R® SafePlus® | diono®

Also Seen Here

2 retailers
  • target.com
    medium

    Diono Radian 3R All-in-One Convertible Car Seat - Pink Blossom

    Diono

    View listing →
  • walmart.com
    high

    Diono Radian 3R All-in-One Convertible Car Seat, Slim Fit 3 Across, Pink Cotton Candy

    Diono

    View listing →

Documents & Data

Customer Reviews

5

50 reviews · out of 5

Quick response

Shelli F.

Ordered a gate prior to this one, UPS lost it on route. I reached out to Kidsy via email and they secured a refund from UPS. Was hesitant to order again, but I couldn't find the gate at a more reasonable price. 2nd order arrived with no issues. Gate is sturdy and the dog (Husky) hasn't gotten through it (he's an escape artist). Quick delivery from start to finish.

My item shipped very quickly and I…

Amanda Almanza

My item shipped very quickly and I received it about 3 days after I ordered it! It came in an extra protected box as well! Very pleased with my purchase!

Quick and easy

Stephanie

Couldn’t believe how simple the process was.

Fast delivery

Michael

Order arrived in 2 days and looked perfect.

Just like described

Lori

Item matched the listing perfectly.

Great deals, easy to use site

ANGELICA ANDRADE

Great deals, easy to use site

Would buy again

Kathy

Everything was smooth and the item was as described.

Great product

Jessica S

I was impressed with the shipping and the item I got looked brand new. Great product and I’ll be ordering again.

Looks unused

Omar

Couldn’t even tell the stroller had been returned.

Fast and efficient

Thomas

Got my item fast and it was in excellent shape.

Stroller came super fast and I love it

Whitney Thomas

Stroller came super fast and I love it

Item was like new

Joanna

Bought a swing and it looked untouched. So happy.

So grateful

Ashley

Found what I needed at a price I could afford.

less money less hassle

viki

Found an item still in its original packaging for 2/3 of the original pricing.

Thank you!

Cheryl

Thank you! Great prices and great items.

Great, trustworthy experience

Lydia M

Great deals, easy checkout with lots of payment options, shipped very quickly, and everything was packed well and looked exactly as it was described! I didn't end up needing any intervention with my shipping experience but appreciate the option to cover lost packages for a minimal fee, especially as we get into the late and lost package holiday season. I'll definitely be getting more of my baby gear from Kidsy.

Exactly what I needed

Megan

Found the exact baby item I needed for half the cost.

The best prices going and shipping is…

Tanya and Gina Hill

The best prices going and shipping is fast.

Perfect

Maria

Everything arrived exactly as expected.

Good experience

Brian T

Item arrived just as described. Couldn’t be happier.

Bouncer worked fine

SE

Bouncer worked fine. Was a little worried when it showed up but it was perfectly fine!

Love Kidsy!

Rebecca

I’ve ordered a few items from Kidsy now and all have been great.

Better than expected

Katie

Everything came packaged well, looked brand new. Super impressed.

Everything was great

Krista

Fast shipping, clear product info, no surprises.

Very happy

Sonia

Really happy with my order. Shipped fast and clean.

Great service

Brigitte

I’m so happy with my experience. Kidsy shipped my order quickly and it was in great condition.

Kidsy Customer Service Review

Josh Radcliff

Kidsy had a great selection of deeply discounted baby gates. Unfortunately, there was a piece missing when I received my package. I didn't realize it until after the 14 day return/exchange window. But I reached out, and they were willing to send me the piece anyway at no extra charge. I really appreciated the customer service.

Great deal

Lauren D

Got a travel system for a great price. Would recommend Kidsy.

Great price and fast delivery.

Alan Brown

Great price and fast delivery.

Highly recommend

Rose

A friend told me about Kidsy and I’ve already ordered twice.

Quick delivery and items in great…

Heather Clarke

Quick delivery and items in great condition!

Holly

For grandparents

Stocked my home for visits from the grandkids.

Kidsy had exactly the baby/pet gates we…

Eileen W

Kidsy had exactly the baby/pet gates we needed...good price...good shipping...good items. If you have children or know someone who has children...this site is a keeper! They get 10 stars!!

I appreciated the detailed description

Carol

I appreciated the detailed description, I knew I was getting a floor model and it came in perfect shape at a much reduced cost. When I thought the cupholders weren't included, I reached out to them and then we found them and they were very responsive and thankful that I let them know. Everything is fine.

Looks like new

Jessica T

Couldn’t believe how good the condition was.

So easy to use

Stacey

Website is easy to use, items are great quality, and shipping is fast.

Was just as described

Crystal C

Was just as described. Quick shipping and communication.

Smooth purchase

Denise

Smooth from checkout to delivery.

Good prices and fast shipping

Jay Kristov

Good prices and fast shipping

Amazing value

Janice

Saved a ton on a big item. Thank you, Kidsy!

Better than marketplace

Wendy

Safer and easier than buying used on Facebook.

The products were very good

SUSAN PASSMORE

The products were very good. More than I’d expected them to be. The color of the diaper bag is beautiful and I know my daughter in love will be happy with it.

Would recommend

Casey

Already told two friends about Kidsy.

Love my stroller

Maureen

Love my stroller. Great deal and great service.

Good stuff

Leo

Love the gear I got for my twins.

Was pleased with the car seat I bought…

Melissa Weaver

Was pleased with the car seat I bought from Kidsy. It was in the condition they described and arrived quickly. Thank you!

Easy process

Jennifer

Super easy to order. Arrived on time and in great shape!

I purchased a glider

Jamie

I purchased a glider. It was described accurately, shipping was fast and price was great!

Great for parents

Joshua

Shopping for gear doesn’t have to break the bank.

Worth it

Nathan

Got a like-new monitor for under $50.

Reddit Insights

6 threads · r/BuyItForLife, r/BabyBumpsCanada, r/CPST, r/daddit

Reddit users appreciate the Diono Radian 3R for its narrow design enabling 3-across installations, but express frustration with rear-facing fit, harness height limitations, and cumbersome adjustments.

mixed sentiment95% match

Positive sentiment for narrow width and 3-across capability, but negative sentiment for rear-facing usage, ease of use, and longevity in higher weight/height limits.

Themes

Narrow width for 3-across installationspositive
Rear-facing fit and height limitsnegative
Ease of installation and adjustmentsnegative
Harness height and longevity in forward-facing/booster modesnegative
Foldable design for travelpositive

Use Cases

  • Fitting three car seats across a back seat (3-across)
  • Travel car seat due to foldable design
  • Extended rear-facing for tall/heavy children

Watch Out For

highSignificant shell cracking observed in rear-facing crash tests (Consumer Reports finding shared by user).
mediumHarness height is shorter than competing seats, so children may outgrow forward-facing harness mode earlier than expected.
mediumRequires an angle adjuster (sold separately) to achieve a more upright installation; otherwise, rear-facing takes up excessive front-to-back space.
mediumBooster mode requires 50 lbs minimum, but many children outgrow harness before reaching that weight, creating a gap.
lowCrotch buckle adjustment can be difficult, requiring rethreading and tools.

Community Q&A

Is the Diono Radian 3R good for rear-facing?
No, many users find it difficult to install rear-facing with adequate legroom, and tall children may outgrow it quickly by height.
Does the Diono Radian 3R work for 3-across installations?
Yes, its narrow width makes it one of the best options for fitting three car seats in a row.
How long will my child fit in the Diono Radian 3R?
Many children outgrow the harness by height before reaching the weight limit, and booster mode may not last until 100 lbs due to functional height limits.

Compared To

vs Graco Extend2Fit

Graco Extend2Fit offers more rear-facing legroom, easier installation, and longer harness height, but is wider than the Diono Radian 3R.

vs Graco Contender

Graco Contender is recommended over the Diono Radian 3R for better rear-facing fit and ease of use.

Source Threads

  • Diono Radian 3R recommended for narrow 3-across and travel

    I have 3 across, using the Diono 3R car seats, all fit perfectly. There's a Diono model that's approved for air travel that folds and isn't awful to carry. We had one, both my son and I loved it.

    u/autopsr/BuyItForLifeView thread →

  • Detailed limitations of Diono Radian 3R: harness height, booster mode, and comparisons

    Just FYI, the Diono won’t last as long as what you’re thinking/hoping when it comes to FF harness and booster. As a Ff harness, the top harness slots are on the shorter side; she’s not likely to get to 59” before outgrowing the seat ff by height. She may not even get close to 65#, either. In fact, many children outgrow the Diono seats by functional height before 50#. As a booster, the seat has a minimum weight of 50#. Many kids outgrow the harness before 50#. The seat also will be outgrown by height as a booster (functional, not stated limits) around the same time as the harness is outgrown if not shortly after. Kids are lucky to get to 65# before outgrowing the booster mode by functional height; almost no child will make it anywhere near 100# in booster mode.

    u/DaniannieBr/BabyBumpsCanadaView thread →

  • Successful 3-across installation in a Subaru Outback

    I have 3 of these across the back of my 2015 Outback. They are a little tight to go in but sit perfectly once in place.

    r/CPSTView thread →

  • Severe dissatisfaction with rear-facing installation and high price vs. performance

    Very unhappy with Diono car seat as rear facing. It is impossible to get a good install with the seatbelt (required for RF after 35lbs) and leaves almost no legroom for the front passenger. We replaced it with a Graco Extend2Fit and it's night and day. The Graco is easier to install, takes up less room, and my kiddo has more legroom. The Diono is overpriced for what you get, and I would not recommend it to anyone for rear-facing.

    r/CPSTView thread →

  • Difficulty adjusting recline and finding headrest ears; considering returning

    I got so excited to buy DD this seat because she's 42 inches and I had to turn her to FFing before I wanted to with her old carseat... she's 36 lb, the manual states she can rear face until 40 lb/44 inches but her head must be 1.5 inches below the headrest ears....problem is, I have no idea what/where the headrest ears are... I’m also going to give a vote for a different seat. Since she’s tall she’s going to outgrow it RF very quickly (if she hasn’t already) and outgrow it FF by height pretty quickly as well.

    u/TheBamaGypsyr/dadditView thread →

  • Mixed experiences: narrow 3-across positive, but better options for rear-facing and ease of use

    We’ve done it, it’s definitely tight but it’ll work with a compact car seat. There are several which specifically advertise 3 across, this is what we have… Diono Radian 3R. I agree, send it back and get an Extend2fit. They're on sale for $129 on Walmart.com right now.

    u/Itchy&Scratchyr/BabyBumpsCanadaView thread →