Diono

Radian® 3QXT FirstClass™ SafePlus™

Diono Radian® 3QXT FirstClass™ SafePlus™

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Overall

#175 in

Travel Car Seats

according to Reddit Icon Reddit

Sentiment score67% positive
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Last updated: Jun 25, 2026

Reddit Reviews

Reddit Iconiwantmy-2dollars
4 months ago

We have 98 and 99th percentile kids and Diono car seats have saved us so much. We had a Graco baby car seat with base even though the Diono has insert for infants. It was just easier to carry baby and we used it for both kids as the were close in age. They are giant 3 and 5yos now and with the long expiration date and weight limit of 120lbs, they’ll be in them until high school. Second hand baby Bjorn bouncer was amazing. Anything food or potty related get the least complicated smoothest surface area products for easy cleaning. Ikea high chair, little partners wooden booster seat, and one piece potty seat.

Reddit Iconaccountability_bot
10 months ago

I’ll second this! I had three Diono seats in the back row of a Subaru outback for a few years. It worked rather well!

Reddit IconaRandom_redditor
10 months ago

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.

Reddit IconArrev
10 months ago

We had 3 Diono Radian car seats fitting in the backseat of a Subaru crosstrek. What’s tricky is when you need some to be rear facing because they lean back far. For that situation they sell a piece of foam that slides under the seat to safely adjust the angle.

Reddit Iconbeyondreason11
10 months ago

Background: We have a minivan and a second car on its last leg, mazda 3. We have 3 kids, one in a forward facing and two in boosters. We want to find a mid size car that will fit everyone plus some cargo space for a hockey bag. Every newer car we look at we can't seem to get the car seat in the middle seat. The issue is the distance between the center seat belt bases. On my mazda is 14" between them so we can get a forward facing car seat buckled and the other two kids in booster seats can still buckle thier seat belts. The Kia Ev6 and the new Ionic 5 only have 9" between them. Nobody's ass can fit in that. Combines this with the new seat belt bases are rigid with no flexibility. First image is the mazda 3 center seat. Second image is all new cars, it seems. Question: if you have 3 kids with car seats, what second row car fits 3 across?

10 months ago

It works in the mazda3 since the center seat belts are 14" apart and the seat belt bases are flexible. New cars seem to have very skinny widths, 8" between belts and the bases are rigid so the car seat covers the seat belt bases part. The Dino is still 14"wide. Thanks

10 months ago

Thanks. All the cars we looked at are at least 51" at the hips. The issue is the location of the seat belt bases plus on newer cars the seat belt base is rigid and not flexible. Literally the seat belt bases were only 9" apart on the center seat. No car seat would fit between that.

Reddit IconBluejay500
2 months ago

We loved our Britax Boulevard but it was not at all good for bigger kids rear facing longer! I think the weight limit was 35 on latch install which some of my kids hit before age 2. We had to change to Diono Radian and Graco Extend to fit to keep them rear facing.

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