You're probably reading this review because you want to know which can deliver the "three in a row" promise - the Graco Slimfit or the Diono Radian 3RXT?

With the hefty price tag, will the Diono Radian 3RXT win over the Graco Slimfit?

Read on.

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Vs

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ideal use

 

 

Graco Slimfit

Diono Radian 3RXT

Rear-Facing Weight:

5 to 40 pounds

5 to 45 pounds

Rear-Facing Height:

the head must be at least 1" below the handle

Up to 44 inches

Forward-Facing Weight:

22 to 65 pounds

20 to 65 pounds

Forward-Facing Height Limit:

27 to 49 inches

Up to 57 inches

Booster Weight:

30 to 100 pounds

Up to 120 pounds

Booster Height Limit:

38 to 57 inches

Less than 57 inches tall


The Diono Radian 3RXT’s rear-facing weight limit is 5 pounds more than the Graco Slimfit.

It also has a higher forward-facing height limit as well as higher booster weight limit.

will it fit in my car?

 

 
Graco Slimfit
Diono Radian 3RXT
Width
19.88 inches
16.5 inches
Height
25.5 inches
28.5 inches
Depth/Length
16.25 inches
16 inches


The Graco Slimfit’s cupholders can be rotated inwards to make the seat “slimmer.” Despite that, the Diono Radian 3RXT is more ideal if you are trying to fit three same car seats in a row.

Graco SlimFit 3 in 1 Convertible Car Seat | Infant to Toddler Car Seat, Saves Space in your Back Seat, Darcie
By
Price: $179.99
(As of: 2021/10/07 12:35 pm - Details
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on https://www.amazon.com/ at the time of purchase will apply to the purchase of this product.
)
You save: $20.00 (10%)
4 new from $179.990 used
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instalLation

 

 
Graco Slimfit
Diono Radian 3RXT
Do I need to use a pool noodle/rolled towel?
No
Easy To Install Rear-Facing?
Yes
Relatively
Easy To Install Forward-Facing?
Yes
Relatively
Easy To Uninstall?
Yes


Installing a car seat can be a pain for clueless first-time parents. If an easy installation is your priority, the Graco Slimfit is a safer choice.


safety

 

 
Graco Slimfit
Diono Radian 3RXT
Steel Frame:
Yes
Five-Point Harness?
Yes
Side Impact Tested:
Yes
Approved For Airplane Use:
Yes
Easy To Buckle And Unbuckle?
Yes
Diono Radian 3RXT, 4-in-1 Convertible Extended Rear and Forward Facing Convertible Car Seat, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Design - Fits 3 Across, Blue Sky
By
Price: $329.99
(As of: 2021/10/07 7:47 am - Details
×
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on https://www.amazon.com/ at the time of purchase will apply to the purchase of this product.
)
4 new from $329.990 used
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the seat

 

 
Graco Slimfit
Diono Radian 3RXT
Is The Material Breathable?
Yes
Seat Weight:
19.5 pounds
28.1 pounds
Machine Washable Cover?
Yes
Roomy?
Yes
No-Rethread Harness?
Yes
No
Comes With An Infant Body Support?
Yes
Easy To Remove Cover?
Yes
Expiration
10 Years
8 Years/10 Years
Comes With A Cup Holder?
Yes
Shoulder Harness Has Pads?
Yes
Leg Straps Has Pads?
No


Air-traveling with a car seat is a little more convenient with the Graco Slimfit given that the Diono 3RXT can be a tank to lug around.

Also, Slimfit’s no re-thread harness is another plus point for parents who appreciate the convenience of just raising the headrest up and down to match the correct harness height of their little passenger.

conclusion


There is an approximately USD 70 price difference between the Graco Slimfit and the Diono Radian 3RXT. The Diono 3RXT is more expensive.

Let’s see what the added cost is for.

  1. The Radian 3RXT has a higher rear-facing weight limit.
  2. The forward-facing height limit is also more generous.
  3. There’s an added 20 pounds more for its booster weight.
  4. It’s way slimmer and more realistic to fit three of it in a row.

Let’s see what Slimfit’s advantages are aside from the monetary savings.

  1. It’s easier to install both in rear-facing and forward-facing mode.
  2. It’s way lighter to bring for air travel.
  3. It has a no-rethread harness.

If I have to choose just one, I’d probably go with the Graco Slimfit.*

 

Do You Need More Help To Decide Between

The Graco Slimfit Or Diono Radian 3RXT?

 

Read My Graco Slimfit Review

See My Diono Radian 3RXT Review

 

What Do You Think?

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

 

Cheers!

Pitin

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the graco slimfit or
I'd love to know your thoughts in the comments section below!

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  1. These are the 2 exact car seats im debating on. Let’s say I go with the graco and my child hits the 100lb booster limit, would I have to buy another booster seat or can they go without by then?

    1. Hi Mirba,

      There are few guidelines when deciding if a child no longer needs a booster seat. By the time they reach the 100-lbs mark (around 12 years old, also depending on the genes) you need to answer the following before letting the child seat using the car seat belt alone.

      1. Can they ride with their backs against the vehicle seat?
      2. Are the knees bent at the edge of the vehicle seat?
      3. Lap belt not on belly – but on top of their thighs?
      4. Shoulder belt between neck and shoulder?
      5. Can sit properly (no playing with seat belts)?

      If they can do all five, they can “graduate” using the car seat. If not, it is best to still let them use a booster seat.

      Here’s a helpful illustration from the car seat lady site.

      Ready to graduate from the booster seat?

      I hope this helps.

      Kind Regards,
      Pitin

    1. Hi Summer,

      According to Diono’s website, “as long as you have 51 inches in the back row from vehicle armrest to armrest,” you can install 3 Diono Radian 3RXT in a row. That means you need 17 inches in the middle to accommodate your 3RXT.

      To fit two infant car seats between a 3RXT inside a Subaru Forester, you must know how wide are the infant car seats. Most of the time, you’ll save space by not using the infant car seat base and just install them via the vehicle seat belt.

      To roughly estimate, know the inside dimensions of your vehicle. Add the width of your 2 infant car seats + the 17 inches needed for the Diono Radian 3RXT.

      There are physical stores that would allow you to test-fit a car seat inside your vehicle before purchasing, so that would help, too, if you are not very comfortable with just doing the math.

      I hope this helps.

      Kind Regards,
      Pitin

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