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Diono Radian R100 Convertible Car Seat - Stone

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Diono Radian R100 Convertible Car Seat - Stone - Diono  - Babies"R"Us
Diono Radian R100 Convertible Car Seat - Stone - Diono  - Babies"R"Us
Diono Radian R100 Convertible Car Seat - Stone - Diono  - Babies"R"Us
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  • $207.99
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Thanks to a versatile design, the Diono RadianR100 Birth to Booster Car Seat could be the only car seat you'll ever need. With its adjustable features, this seat can safely accommodate children from birth all the way up to 100 pounds and 57 inches tall. The RadianR100 is designed with your child's security and safety as top priorities. Premium materials and thoughtful safety features like a steel alloy frame, aluminum reinforced side walls, energy absorbing EPS foam, and a five-point harness put your mind at ease as your little one stays safe and sound.

  • Seat features three modes to accommodate growing children
  • Designed with a steel alloy frame and energy absorbing EPS foam
  • Easy-to-clean cover is soft against child's skin
  • SuperLATCH for a secure installation
  • Five-point harness provides dependable security
  • Approved for use on airplanes
  • Age/Weight Requirements: 5 - 40 pounds rear-facing; 20 - 65 pounds forward-facing.
    Booster mode fits children weighing up to 100 pounds or up to 57 inches tall
  • Assembly Requirements: Some assembly required
  • Warranty: One-year limited warranty

Included in the Box

RadianR100 Stone Birth to Booster Car Seat, rear-facing base, SafeStop harness, rear-facing tether connector strap, and instruction manual.

*For vehicles manufactured after September 2005. For vehicles manufactured prior to September 2005, consult the vehicle owner's manual for lower anchor weight limits.

Trademark Information:

Diono RadianR100 Convertible plus Booster Car Seat Product Image


Steel Alloy Frame

Steel Alloy Frame and EPS Foam for Protection

The RadianR100 features a steel alloy frame for a strong foundation. Aluminum reinforced side walls are lined with thick, energy absorbing EPS foam for side impact protection. The SafeStop energy absorbing harness provides extra protection for children 20 to 40 pounds. When installed, the harness's bungee-like energy absorption reduces impact when your child is seated in the forward-facing position. Additionally, the RadianR100 boasts rear-facing tether capability to reduce seat rotation in the event of an impact.

Accomodates Growing Children

Versatile Seat Grows with Your Child

The RadianR100 offers the adaptability you need to keep your child's car rides safe and comfortable for years. From birth to booster, the RadianR100 fits children in the rear-facing position weighing from 5 to 40 pounds and children in the forward-facing position weighing from 20 to 65 pounds.

With longevity in mind, this model converts to a booster seat for kids up to 100 pounds.

Rear-Facing Position

Deep Seat Design and Plush Cover for a Comfy Ride

All Radian seats have a deep shell to cradle your child for a more comfortable rear-facing ride and to provide a higher rear-facing capacity. A plush cloth surface feels soft against your little one's skin. Expandable sides and a longer seat bottom offer better leg support and help keep children cradled in a custom fit that adapts throughout their physical development. Two forward-facing recline positions allow the RadianR100 to fit a wide variety of vehicle seats.

SuperLATCH Installation

SuperLATCH Feature for Secure Installation

Diono's SuperLATCH feature makes use of your car's LATCH system to take advantage of the Radian100's full weight capacity.* The SuperLATCH connectors are successfully crash tested for children weighing up to 40 pounds rear-facing and up to 65 pounds forward-facing. In vehicles with LATCH anchors, SuperLATCH is a safe, convenient way to install the RadianR100. Rubber bottom grips protect your car's upholstery and ensure the seat won't slide after installation.

Compact Design

Slim Profile and Convenient Features

A slim profile means the RadianR100 can sit three across in most vehicles. Because it doesn't have a pedestal, the seat sits relatively low which allows the child to board with ease. The seat folds up when not in use, so storing or transporting the seat is easy. The machine-washable cover and cup holder compatibility (sold separately, you can add up to four per seat) make this car seat even more convenient.

NCAP Crash Tested

Testing and Warranty Information

This car seat surpasses federal crash test standards and meets NCAP standards, the industry benchmark for verifying child seat performance in severe accident conditions. The R100 is tested at its maximum forward-facing, rear-facing and booster weight capacities and is rated for an impressive 10 years of life. The car seat is also FAA approved for use on airplanes. The Diono RadianR100 Birth to Booster Car Seat is backed by a manufacturer's limited one-year warranty.

Product Description

The Diono RadianR100 is a highly versatile car seat that could be the only seat you'll ever need. It comfortably seats rear-facing children from 5-40 lbs, forward-facing children from 20-65 lbs in 5-point harness, then converts to a booster for children up to 100 lbs. Built for strength and safety, the RadianR100 has a steel alloy frame, reinforced sidewalls, SafeStop energy absorbing harness, thick EPS foam panels for side impact protection and our unique SuperLATCH system for easy installation. The RadianR100 is NCAP crash tested, the industry benchmark for verifying child seat performance in severe accident conditions, and rated for LATCH use with a child up to 65 lbs. The R100 sits low on a vehicle seat for easy child boarding and with expandable sides and a longer seat bottom there plenty of room and comfort for your growing child. Option to add up to 4 cup holders (sold separately). It also folds flat for travel and storage, has a 10 year life, and offers amazing safety, comfort and convenience your child won't outgrow.


  • The Diono Radian R100 is rear-facing: 5 - 40 lbs; Forward-facing: 20 - 65 lbs and up to 57 inches in a 5-point harness; Booster to 100 lbs
  • Steel alloy frame and aluminum reinforced sides; SafeStop energy absorbing harness; Adjustable head support, reinforced for complete side impact safety: Energy absorbing EPS foam panels on all sides
  • Rear-facing tether capability; LATCH installation up to 65 lb child; 5 shoulder and 3 buckle positions for custom fit; Expandable sides and longer seat bottom for leg support and comfort
  • 2 recline positions in forward-facing mode; Sits low on vehicle seat for easy child boarding; Fits 3 across in a mid-size vehicle and offers more shoulder space
  • Folds flat for travel and storage

Additional Info





5 lbs

100 lbs


Cup Holder(s)



29 pounds

20.7 x 18.2 x 12.8

How to Get It

  • This item can be shipped to the entire United States including Alaska, Hawaii, and all U.S. territories including Puerto Rico
  • This item can also be shipped to APO/FPO addresses and to P.O. Boxes in all 50 states
  • Due to shipping restrictions, Ship Charges will be separate from other items in your order
  • This item will ship by itself

  • This item may be shipped via Standard Shipping, Expedited Shipping or Express Shipping
  • Please Note: Some addresses are eligible for Standard Shipping only (APO/FPO, P.O. Boxes, U.S. Territories and Puerto Rico)

(learn more):

  • This item is sold online only (not sold in stores)
  • Orders placed for Store Pickup will receive online pricing and promotions
  • In-stock status is approximate and may not reflect recent sales
  • Not all items are carried at all stores. Please click the "Select a store" link to check product availability
This item may be shipped in the manufacturer's original packaging, which could reveal the contents of the box

Average Customer Rating:

by PowerReviews
Diono Radian R100 Convertible Car Seat - Stone

(based on 81 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.


  • Durable (7)
  • Comfortable (5)
  • Safe (4)


  • Heavy (5)
  • Difficult to adjust (3)

Best Uses

  • Toddler (5)
  • Infants (3)
    • Reviewer Profile:
    • Parent of two or more children (6)
    • Was this a gift?:
    • No (5)

Most Helpful Positive Review


Great Seat for Smaller Vehicles

I have used Britax Marathons for years with my two girls. I love those seats, but we recently sold our Yukon for a Chevrolet Equinox. It gets much better gas mileage but is...Read complete review

I have used Britax Marathons for years with my two girls. I love those seats, but we recently sold our Yukon for a Chevrolet Equinox. It gets much better gas mileage but is considerably smaller. There was no way to fit both our seats and another person in the back seat so we got two Radians. It is a little tight, but with both Radians in the back seat a third person or third car seat will fit. I like the fact that is converts to a booster when we are ready. I will say I have owned several car seats over the years and these were by far the hardest to install. I think this was in part to the short tether strap adjustment and the fact that our read headrests are unmoveable. We also have some generic seat protectors that we have used under all our other seats. We had to get rid of those in order to get a good fit for the seats. Both my girls are comfortable in these seats and like how low they are compared to the Britax.
Overall, if you have the room, I still beleive the Britax Marathon is a better seat, but if you need space this is still a good solid seat. It does have several similar features of the Britax. I miss the ease of use for adjusting the straps on the Britax. Both my children are forward facing, so I cannot speak to the rear facing options for this seat. I would recommend this seat to anyone with more than one car seat in the car and/or who drive small and midsize vehicles.


Most Helpful Critical Review


Can not get a secure installation with a seat belt

I bought this car seat thinking it was going to work out great but it is nearly impossible to get a secure installation using the seat belt! This is not good if your car...Read complete review

I bought this car seat thinking it was going to work out great but it is nearly impossible to get a secure installation using the seat belt! This is not good if your car doesn't have latch anchors! Very disappointed. Also you have to purchase an Adjuster to get the seat to fit in my car so the passenger or driver can sit comfortably! That should be included for the price I paid for this seat!

Reviewed by 81 customers

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Fits three in a row for a Toyota Corolla

By mommy of twin babies and a toddler

from Lafayette,La

About Me Parent of Multiples (Twins etc)


  • Comfortable
  • Easy to Clean
  • Easy to install
  • Safe
  • Sturdy
  • Stylish


  • Difficult To Adjust
  • Heavy

Best Uses

  • Infants
  • Toddlers

Comments about Diono Radian R100 Convertible Car Seat - Stone:

We have eighteen month old twins and a three year old. We only have two Toyota Corollas. The back seat is very small. The twins grew out their baby carriers and needed something bigger. We bought three and installed all three in the back of our small car. We didn't have any problems. The directions were simple to understand. We love these seats. Yes they are very heavy. They are super slim and not all the extra bulk on the sides that takes up your entire back seat. We are very happy with our purchase and would definitely recommend these seats to anyone. I wish we had bought this to begin with four all three of the kids. We've been through six car seats with three kids including these three dionos we just bought makes nine. They are by far the best and can grow with a newborn until the child is out of booster seat.

Comment on this review


Great product, that could use some minor tweaking

By oddduck

from London, ON, Canada

Comments about Diono Radian R100 Convertible Car Seat - Stone:

I've had a Diono Radian R100 installed in my car for 6-8 months now for my 12mo old, both with and without the angle adjuster. I would recommend it for those who are either planning to rear facing for a long period of time, or for those who need something narrow. There are a few things I would love to be improved. 1. The belt path is so low and narrow that it is hard for me to squeeze my hand in there. It isn't much better forward facing and tends to cause the belt to bunch. 2. I'm not overly fond of the ratching harness tightening. Realistically every time I loosen or tighten I pull the harness on the back of the seat and then the adjuster strap. I do wish it was a smooth pull. 3. The chest clip is so wide that it pulls the harness off the shoulder of younger infants.

Comment on this review


Really great value!

By juditupp

from Colorado

Comments about Diono Radian R100 Convertible Car Seat - Stone:

When my baby began to outgrow her infant car seat I wanted a seat that could continue to be rear facing and that would keep me from having to purchase more car seats. I purchased the R100 for less then many of the popular convertible car seats out there. I love that it will be safe for a full 10 years so I'm actually done buying car seats. I love that it is less bulky when rear facing then other car seats. The only down side is that it is heavy but it is totally worth it. This is the car seat I recommend every time. I also used it forward facing (with the 5 point harness) for my then 5 year old and he had plenty of space to grow so I know it will last my daughter until she can use an adult seat belt.

Comment on this review

(1 of 1 customers found this review helpful)


Expensive and WELL worth it!

By Crystal

from Blackfalds, AB, Canada

Comments about Diono Radian R100 Convertible Car Seat - Stone:

I have my 2 year old and 4 year old in these. I LOVE that my 2 year old was able to be rear-facing for longer, he's a pretty hefty kid and this seat could handle it. And I LOVE that my 4 year old just moved into the last harness slot so he'll probably be harnessed till he's 5! The seats can be hard to install in our vehicle since the LATCH loops are so close to the base of the seat, and with both seats we noticed when buckling the boys in it was difficult to tighten their harnesses when the seats were brand new. We learned how to use them and now I can install one in a minute or so and harnessing the kids in isn't hard anymore. These seats are worth every penny we spent and I would no longer feel safe putting the kids in one of the big winged plastic seats. Great design, simplicity, comfort and peace of mind. :D

Comment on this review


slim, sturdy

By Carla

from Louisiana

Comments about Diono Radian R100 Convertible Car Seat - Stone:

We got this carseat because we needed to get 3 carseats in a row and was told this was the one to get. They were right! This is a nice and slim seat to puzzle with other seats when trying to fit carseats into a tiny space. It can easily get kids to 3 to 4 years old rear facing and then will last more years forward facing. It's easy to install and buckle. The seat itself is pretty comfy and my son loves to ride in it.

Comment on this review


A Seriously Sturdy Seat

By MBear

from River Valley, Arkansas

Comments about Diono Radian R100 Convertible Car Seat - Stone:

A friend game me a radian with two years left before expiration so when it expired, I had no choice but to find a replacement. I was hesitant to shell out the hefty price of the radian and purchased a much cheaper seat. I hated feeling like my child wasn't safe. It was awful. So, obviously, I then purchased a new radian like I should have done to begin with. We love this seat. It's comfortable, it's easy for my son to hook and unhook from, and I have peace of mind. Sometimes that costs a little more and for this guy, I'm happy to pay it:)

Comment on this review


Best Car Seat ever!

By Lisaedkids

from Ocala, FL

Comments about Diono Radian R100 Convertible Car Seat - Stone:

This is the best car seat we have ever used and will NOT buy another brand ever! LOVE the fact that it can be your only car seat from newborn to school aged booster! I love all the padding to protect the child giving them a nice comfy ride every where you go and so easy to install in your vehicle and all the safety features. We also love the colors it is available in so you can match your vehicle. When baby is happy everyone is happy! :)

Comment on this review


absolutely LOVE this seat

By Jillian

from Ft Riley, Ks

Comments about Diono Radian R100 Convertible Car Seat - Stone:

We bought this seat for my son when he was 1. We had a small little 2012 accent hatchback, and also had 3 kids. My son needed an upgrade from the carrier and our middle child was still in a booster. This seat is narrow enough to fit small cars, yet still one of the safest seats with steal framing. It folds when and if needed and will literally be the last seat we buy my son. We now have a larger vehicle, and will still be getting another Diono for baby #4 I'm carrying now. We just haven't which one since there's different awesome choices. I ha e recommended this seat over and over again when people are in the market and make post on local sites. Thank you for making such an awesome seat.

Comment on this review


Love it!

By Summer

from West Fork, AR

Comments about Diono Radian R100 Convertible Car Seat - Stone:

Love the ease of installation, the safety, and the streamlined design. No huge bulky seat that takes up half the back seat of a vehicle. Safe and comfortable for my child.

Comment on this review

(0 of 1 customers found this review helpful)


great seat

By JessicaB

from Florida

Comments about Diono Radian R100 Convertible Car Seat - Stone:

I have three of thesthree across in my small I needed something that could fit three across in my small car. this was the perfect fit. the only thing I don't like about this seat is how heavy it is sometimes I need to move my seats into another vehicle and if you're the type of person who does that a lot you will get tired of lifting these things. otherwise these are the perfect fit for us, they fit so good in my car, and I love that's the only see I'm ever going to need.

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