
Diono - Radian 3RX
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Based on 1 year's data from Feb 24, 2026 How it works
in my '94 300tdi 110 I used a Diono Radian 3RX but that's forward facing (not for a newborn) and has a proper middle row... You might want to think about buying at least 1 of these (https://www.exmoortrim.co.uk/seating/defender-load-area/loc-and-fold-right-hand.html) first, then putting a rear facing baby seat in that.
I have the Diono brand
Wife has all graycos in her SUV. I liked the diono better so went with that for my truck. Now she likes those better and also wants them for her car… sure let’s spend another $600 on car seats
Currently have a Silverado 2500 and there’s some room still, but the gladiator cab is obviously a bit smaller
I three Diono R3s. That’s about as slim as they come. Currently have a Silverado 2500 which has plenty of room. But if I downsized it would be between a Gladiator and maybe a Colorado.
We have a Nuna exec at home but we're traveling for the first time with our new diono r3. You need to purchase straps but it can be carried like a backpack. It doesn't fit rear facing in economy on an airplane, but it works rear facing or front facing for cars and it's super easy to install. We like it for what it is. Our big guy fits in it with room to Grow
We have a travel car seat - the diono r3 - and you can buy straps for it that effectively make it into a backpack. We've used it domestically and internationally and it fits on coach seats (front facing) and then you can use it rear facing for the car once you get where you're going. Every time we travel with it, we have parents stopping us and asking about it. Super light weight and easy to use!
I just went through this for my kids. I looked up gladiator boards and they recommended the Radian 3R. I bought them and I couldn’t get them tight enough for my comfort, so I returned them. I did find the answer though, with the Britax Poplar convertible seats. More expensive, but better rated, and their click tight feature made it really secure. That’s my rec. I currently have them on both ends with an infant car seat in the middle. Works like a charm.
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!
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.
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.
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.
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?
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
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.
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.
Yeah, we ran a Radian in the middle with a Civic hatch and it had room for a booster next to it.
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