Britax Boulevard ClickTight vs Diono Radian 3RXT

Both are convertible car seats — here are their published manufacturer specs side by side.

This compares published manufacturer specs — not safety or fit advice. The seat's manual, your vehicle's manual, NHTSA's tools and a certified CPST are the fit-and-safety authority; always check them before installing.

How they differ

• the Diono Radian 3RXT is listed narrow (roughly ≤17″) for fitting three across a back seat; the Britax Boulevard ClickTight isn't listed narrow
• the Diono Radian 3RXT lists extended rear-facing (a higher rear-facing weight limit, ~40-50 lb); the Britax Boulevard ClickTight doesn't

Recall record

Britax — 21 on NHTSA's record · Diono — 2 on NHTSA's record.

That is the record of the brand — not a verdict on these models. A recall names specific models and manufacture-date ranges, and a seat missing from the record is not "recall-free": check nhtsa.gov/recalls with the model and date of manufacture on your seat's label. Source: NHTSA, retrieved 2026-07-16.

Where to buy

Check the Britax Boulevard ClickTight price on Amazon →

Check the Diono Radian 3RXT price on Amazon →

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which seats we compare.

FAQ

What's the difference between the Britax Boulevard ClickTight and the Diono Radian 3RXT?
The Britax Boulevard ClickTight is FAA-approved for aircraft; the Diono Radian 3RXT is narrow for 3-across, extended rear-facing, FAA-approved for aircraft. Both are convertible car seats.

Which fits three across, the Britax Boulevard ClickTight or the Diono Radian 3RXT?
The Diono Radian 3RXT is listed narrow (~≤17″) for 3-across; the Britax Boulevard ClickTight isn't. Three-across fit still depends on your exact vehicle — confirm before buying.

Which is right for my car and child, the Britax Boulevard ClickTight or the Diono Radian 3RXT?
That depends on your specific vehicle and child — this page compares published manufacturer specs only, not fit or safety. Check the seat manual, your vehicle manual, NHTSA's car-seat finder and ideally a certified CPST before deciding.

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