# Convertible car seats that also work as boosters Which convertible car seats can later be used in booster mode for older children? Diono Radian 3RX Latch: It supports rear\-facing, forward\-facing and booster use\. Booster mode is listed for 40–120 lb \(18–54 kg\)\. Diono Radian 3R SafePlus: The manual covers all\-in\-one use from 4 to 120 lb\. Booster mode is for children 40–120 lb and 40–57 in tall\. DIONO Radian 3RXT: It is designed for rear\-facing, forward\-facing and booster use\. Booster use is listed for children weighing 40–120 lb \(18–54 kg\)\. Diono Radian 3QXT\+ Latch Convertible Car Seat: It supports rear\-facing from 4–50 lb, forward\-facing from 22–65 lb and high\-back booster use from 40–120 lb\. Baby Trend Journey 4\-in\-1 Convertible Car Seat: Booster use is for children at least 4 years old, weighing 40–100 lb and measuring 44–57 inches\. ### 1. [Diono Radian 3RX Latch](/products/ucp/anbbaby-com/6830758330454) (sold by anbbaby\.com) Booster mode is listed for 40–120 lb \(18–54 kg\)\. - Booster limits: Booster mode is listed for 40–120 lb \(18–54 kg\)\. (guide) - Seat weight: The store lists the seat at 28\.1 lb \(12\.76 kg\)\. (guide) ### 2. [Diono Radian 3R SafePlus](/products/ucp/anbbaby-com/8558162084126) (sold by anbbaby\.com) Booster mode is for children 40–120 lb and 40–57 in tall\. - Booster limits: Booster mode is for children 40–120 lb and 40–57 in tall\. (manual) - Seat weight: The seat weighs 29\.3 lb\. (guide) ### 3. [DIONO Radian 3RXT](/products/ucp/anbbaby-com/4510233428054) (sold by anbbaby\.com) Booster use is listed for children weighing 40–120 lb \(18–54 kg\)\. - Booster limits: Booster use is listed for children weighing 40–120 lb \(18–54 kg\)\. (guide) - Seat weight: The seat weighs 26\.4 lb \(11\.97 kg\)\. (guide) ### 4. [Diono Radian 3QXT\+ Latch Convertible Car Seat](/products/ucp/anbbaby-com/6830760722518) (sold by anbbaby\.com) It supports rear\-facing from 4–50 lb, forward\-facing from 22–65 lb and high\-back booster use from 40–120 lb\. - Booster limits: It supports rear\-facing from 4–50 lb, forward\-facing from 22–65 lb and high\-back booster use from 40–120 lb\. (guide) - Seat weight: The seat weighs 34\.2 lb\. (guide) ### 5. [Baby Trend Journey 4\-in\-1 Convertible Car Seat](/products/ucp/babytrend-com/15998523933041) (sold by babytrend\.com) Booster use is for children at least 4 years old, weighing 40–100 lb and measuring 44–57 inches\. - Booster limits: Booster use is for children at least 4 years old, weighing 40–100 lb and measuring 44–57 inches\. (guide) - Seat weight: The car seat weighs 16\.24 lb\. (guide) ## Also cited in the text - Diono Radian 3R SafePlus, Modes and limits: The manual covers all\-in\-one use from 4 to 120 lb\. (manual) - Diono Radian 3RX Latch, Seat type: It supports rear\-facing, forward\-facing and booster use\. (guide) - DIONO Radian 3RXT, Modes: It is designed for rear\-facing, forward\-facing and booster use\. (guide) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-22T23:25:04.200Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)