Diono

Radian® 3QXT FirstClass™ SafePlus™

Diono Radian® 3QXT FirstClass™ SafePlus™

Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.

Overall

#170 in

Travel Car Seats

according to Reddit Icon Reddit

Sentiment score50% positive
2
1
1
Last updated: Apr 26, 2026

Reddit Reviews

Reddit Iconiwantmy-2dollars
about 2 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
8 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
8 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
8 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 IconBacchus1976
12 months ago

We bought a Diono Radian with a backpack travel bag. It folds up and is relatively portable. It’s definitely not lightweight or cheap, but it’s substantial enough to feel safe and we use it in our second car as an every day car seat. There’s cheaper and lighter options, but we’re semi regular travelers so having something solid and comfortable for the kid is worth the extra money and weight. The car seat is a lifesaver on the plane. It’s not explicitly required but strapping her into a familiar seat makes the experience way less stressful. There’s no chance she’d sit still without it.

Reddit Iconbeyondreason11
8 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?

8 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

8 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 IconBobatt
8 months ago

I believe the Diono Radian is narrow enough to fit three across in most cars. We used to do it in the middle of a Honda civic hatch with a booster on one side.

8 months ago

Yeah, we ran a Radian in the middle with a Civic hatch and it had room for a booster next to it.

Reddit Iconbothtypesoffirefly
9 months ago

We have a Chicco and a Diono radian and I think the diono is much easier unless you’re installing it RF because the extra strap (required in US) is hard. Now my 4.5 is FF it’s the easiest seat all around.

Rankings by Use Case

Top recommendations from others in the same boat

Other Reddit Recommendations: