Evenflo Revolve360 Slim vs Diono Radian 3R

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 3R is listed narrow (roughly ≤17″) for fitting three across a back seat; the Evenflo Revolve360 Slim isn't listed narrow
• the Evenflo Revolve360 Slim lists extended rear-facing (a higher rear-facing weight limit, ~40-50 lb); the Diono Radian 3R doesn't
• the Diono Radian 3R is FAA-approved for aircraft; the Evenflo Revolve360 Slim isn't (harnessed seats can be FAA-approved; boosters never are — a plane has no shoulder belt)

Published limits

Evenflo Revolve360 Slim: Evenflo prints a height range (min–max). Useful life is set by the expiration date on the label (no printed number of years).

Diono Radian 3R: All-in-one (rear-facing → forward-facing harness → high-back booster; no backless mode found in manual). Forward-facing floor is genuinely higher than the Radian 3RXT/3QXT siblings — manual: "infants who weigh less than 26.5 lb (12 kg) AND are under 1 year old MUST use this child restraint rear-facing" (both conditions apply). Expired 10 years from date of purchase.

Printed verbatim in the manufacturer's manual (Evenflo Revolve360 Slim Owner's Manual · Diono Radian 3R Series Car Seat Instruction Manual); “—” = not published for that mode, “not yet sourced” = we haven't read that manual yet, not that the seat has no limit. How we source these →

Recall record

Evenflo — 41 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 Evenflo Revolve360 Slim price on Amazon →

Check the Diono Radian 3R 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 Evenflo Revolve360 Slim and the Diono Radian 3R?
The Evenflo Revolve360 Slim is extended rear-facing; the Diono Radian 3R is narrow for 3-across, FAA-approved for aircraft. Both are convertible car seats.

Is the Evenflo Revolve360 Slim or the Diono Radian 3R FAA-approved for flying?
The Diono Radian 3R is FAA-approved for aircraft; the Evenflo Revolve360 Slim is not. (Harnessed seats can be FAA-approved; booster seats never are, because a plane has no shoulder belt.)

Which fits three across, the Evenflo Revolve360 Slim or the Diono Radian 3R?
The Diono Radian 3R is listed narrow (~≤17″) for 3-across; the Evenflo Revolve360 Slim isn't. Three-across fit still depends on your exact vehicle — confirm before buying.

Which is right for my car and child, the Evenflo Revolve360 Slim or the Diono Radian 3R?
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.

More convertible comparisons: Cosco Scenera NEXT vs Evenflo Revolve360 Slim · WAYB Pico vs Evenflo Revolve360 Slim · Evenflo Tribute LX vs Evenflo Revolve360 Slim · Graco Extend2Fit vs Cosco Scenera NEXT · all convertible seats · all comparisons