The Diono Radian R100 Vs R120 are two of the best options if you are not comfortable with the head wing that the Diono Radian RXT comes with. But which of the two is a better choice?

Learn more.

Last Updated: February 28, 2018
 

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Diono Radian R100

Vs

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Diono Radian R120

 

 

Ideal Use


 

Radian R100 Radian R120
Rear-Facing Weight: 5 to 40 lbs 5 to 45 lbs
Rear-Facing Height Limit: 44 inches
Forward-Facing Weight: 20 to 65 lbs 20 to 80 lbs
Forward-Facing Height Limit: 57 inches
Booster Weight: 50 to 100 lbs 50 to 120 lbs

The Diono Radian R120 has higher weight limits. It can be used rear-facing until 45 pounds compared to the 40 pounds rear-facing limit of the R100.

Forward-facing, the R100 can only be used until 65 pounds, something that is quite common to a lot of 2-way car seats.

R120 can be used until your child is 120 lbs vs R100’s 100 pounds limit. 

 

Will It Fit In My Car?


 

Radian R100 Radian R120
Width 17 inches (overall width, with seat cover)
Height 28.5 inches
Depth/Length 16 inches

Both seats have exactly the same dimensions. They are considered to be one of the narrowest seats, at least as of writing this review.

Rear-facing and forward facing, you can fit three of them in a row.

Take note that their height plus the recline can eat up a lot of space especially in a small car, requiring the seat directly across it to be moved all the way to the front.

To give the driver seat or the front passenger seat more room to sit comfortably, an angle adjuster can be placed under the base of the R100 and R120. However, this can only be done when your child has already gained a proper head control as the angle adjuster will make the seat more upright.
 
 

Diono Radian R100 All-in-One Convertible Car Seat, For Children from Birth to 100 Pounds, Black Mist (Discontinued)
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Installation


 

Radian R100 Radian R120
Do I need to use a pool noodle/rolled towel? No
Easy To Install Rear-Facing? Relatively
Easy To Install Forward-Facing? Relatively
Easy To Uninstall? Yes

While most parents who got these two seats swear that it is a bit tricky to install, there are those who can do the installation easy as well.

In my separate reviews of the R100 and R120, I have embedded some useful installation videos on how to easily install both of them whichever way they are facing.
 
 

Diono Radian R120 All-in-One Convertible Car Seat, For Children from Birth to 120 Pounds, Essex (Discontinued by Manufacture)
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Price: --
(As of: 2021/07/16 6:04 am - Details
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Safety


 

Radian R100 Radian R120
Country Of Origin: China
Steel Frame: Yes
Added Structural Support: No Yes
Five-Point Harness? Yes
Side Impact Tested: Yes
Approved For Airplane Use: Yes
Easy To Buckle And Unbuckle? Yes

While both seats are built for safety, the R120 has added structural support mainly because of its higher weight limit.

 

 

Check Out The Diono Radian R100 Colors

Check Out The Diono Radian R120 Colors

 

 

The Seat


 

Radian R100 Radian R120
Memory Foam Under The Bum No Yes
Is The Material Breathable? Yes
Seat Weight: 25 pounds
Machine Washable Cover? Yes
Roomy? Yes
No-Rethread Harness? No
Comes With An Infant Body Support? No Yes
Easy To Remove Cover? Yes
Expiration 10 years
Comes With A Cup Holder? No Yes
Shoulder Harness Has Pads? Yes
Leg Straps Has Pads? No

For longer rides, the R120 has a memory foam under the bum area for added comfort.

Both seats have breathable materials so you don’t have to worry about overheating in the seat, especially on hot weathers.

They are equally heavy despite the R120’s higher weight limit.

Both covers are easy to remove and put back should you need to wash them and both seat covers are machine-washable.

Although they are narrow, both of them have leg sides that are expandable should your child needs more room.

As your child grows taller, you will have to manually remove the harness and place them to the next higher slots for both seats since they don’t come with non-rethread harnesses.

You’ll need to get a separate newborn/infant body support as well as a cup holder for the R100 since it does not come with them.

 

Compare The Price Difference


 

Radian R100

Radian R120

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Conclusion


 

There’s an approximately USD 40 price difference between the R100 and the R120. The R120 is more expensive. Now let’s see what the added USD 40 is for.

  1. R120 has higher weight limits.
  2. R120 has added structural support.
  3. R120 has an additional memory foam under the bum area for more comfortable long rides.
  4. R120 has an infant body support.
  5. R120 has a cup holder.

Getting a cup holder and an infant body support separately would cost you around USD 20. That makes the price difference of the two closer to USD 20.

Now for USD 20 more, you can have your child in the seat for 20 pounds more, have an added structural support for additional safety, and will have a more comfortable ride because of the memory foam under the bum.

Are these three points worth USD20? I think yes.

However, getting the R100 for an older child is not a bad move. Getting the R100 for a child that has just outgrown an infant seat eliminates the need for an infant body support.

Also, if your child happens to be on the lighter side, you wouldn’t need a seat that can accommodate as much as 120 pounds. This also means you wouldn’t need to have an added structural support since the R100 structure is already safe enough for a 100-pound limit.

 

Do You Need More Help Deciding Between

The Diono Radian R100 Vs R120?

 

See My Diono Radian R100 Review

Read My Diono Radian R120 Review

 

Which of the two seats gets your vote and why?

I’d love to know your thoughts in the comments section below!

 

Cheers!

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The Diono Radian R100 Vs R120


 

Good All-In-One Car Seats Alternatives


 

Good 2-Way Car Seats Alternatives


 

Read Related Reviews


 


 

November 22, 2017 Update:


Diono voluntarily recalled over 500,000 Diono car seats. Affected models are those manufactured between January 2014 and September 2017.

The following models were affected:

  1. Diono Radian RXT
  2. Diono Radian R120
  3. Diono Radian 100
  4. Diono Olympia
  5. Diono Pacifica
  6. Diono Ranier

According to Diono’s internal testing, using the above car seats for children over 65 pounds and secured only by lap belt but without top tether may be at risk of an injury. See the guides.

diono recall


Models from October 2017 onwards, are not affected by the recall as of this update.

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  1. You will get more extended use for the R120 so it may be worth it if you can afford the extra money. It is good to keep young children restrained in specialized car seats as long as possible as they are more protected in case of an accident.

    The few extra enhancements in the R120 could make life a little easier, like the cup holder for when your child is a little older. The extra support offered by the R120 is also a nice extra.

    I guess affordability will be the main contention here.

    1. Hi Natalie,

      I think both are affordable for what they have to offer. 

      The price difference is not much (only around USD 20-40) and I think it is best to take advantage of the extras in the R120 since you won’t really know if your child will be heavier when the time comes.

      Regards,

      Pitin

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