{
  "schema_version": "compare-page.v2",
  "page_id": "convertible-car-seats-that-fit-three-across-in-one-back-seat",
  "url": "https://robotrunk.com/compare/want/convertible-car-seats-that-fit-three-across-in-one-back-seat",
  "title": "Convertible car seats that fit three across",
  "question": "Which convertible car seats fit three across in a single back seat?",
  "answer": "Diono Radian 3QX Ultimate 3 Across All-in-One Car Seat: It fit two Radian 3QX seats plus an infant carrier in a mid-size SUV and, per another parent, in a 2016 Toyota Tacoma.\nBritax One4Life Slim: The seat is 17.5 in wide and Britax says it is designed to fit three across.\nDiono Radian 3R SafePlus: The retailer says the slim-fit design permits three seats across in most midsize vehicles.\nNuna EXEC Next All-In-One Convertible Car Seat: The slim design fits 3 across in most mid-sized vehicles.\nDIONO Radian 3RX: The store says three seats will most likely fit when the rear row measures at least 51 inches (129.6 cm) between armrests; vehicle-belt installation may be necessary.",
  "kind": "convertible car seat",
  "market": "US",
  "generated_at": "2026-10-27T11:55:11.955Z",
  "columns": [
    "Three-across fit",
    "Width",
    "Installation"
  ],
  "notices": {
    "facts": "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.",
    "price": "Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live."
  },
  "cited_facts": [
    {
      "ref": "p1.f1",
      "product": "Diono Radian 3R SafePlus",
      "field": "Dimensions",
      "value": "It measures 28.5 in high by 17 in wide by 16 in deep unfolded, and 11.5 in deep folded.",
      "stated_as": "Unfolded Dimensions:\n28.5\" H x 17\" W x 16\" D\nFolded Dimensions:\n28.5\" H x 17\" W x 11.5\" D",
      "source_type": "guide",
      "source_url": "https://anb-baby.myshopify.com/products/diono-radian-3-r-safe-convertible-car-seat",
      "source_read_at": "2026-09-25T04:25:52.115Z"
    },
    {
      "ref": "p1.f7",
      "product": "Diono Radian 3R SafePlus",
      "field": "Three-across fit",
      "value": "The retailer says the slim-fit design permits three seats across in most midsize vehicles.",
      "stated_as": "the slim-fit design allows three seats across in most mid-sized vehicles",
      "source_type": "guide",
      "source_url": "https://anb-baby.myshopify.com/products/diono-radian-3-r-safe-convertible-car-seat",
      "source_read_at": "2026-09-25T04:25:52.115Z"
    },
    {
      "ref": "p2.f4",
      "product": "Nuna EXEC Next All-In-One Convertible Car Seat",
      "field": "Fitting three across",
      "value": "The slim design fits 3 across in most mid-sized vehicles.",
      "stated_as": "Slim design fits 3 across in most mid-sized vehicles",
      "source_type": "listing",
      "source_url": "https://dd1dfe-a3.myshopify.com/products.json",
      "source_read_at": "2026-10-08T19:02:14.639Z"
    },
    {
      "ref": "p3.f7",
      "product": "DIONO Radian 3RX",
      "field": "Three-across fit",
      "value": "The store says three seats will most likely fit when the rear row measures at least 51 inches (129.6 cm) between armrests; vehicle-belt installation may be necessary.",
      "stated_as": "Most likely, yes, as long as you have 51″ (129.6 cm) in the back row from vehicle armrest to armrest. It may be necessary to install all three using the vehicle seat belt system..",
      "source_type": "guide",
      "source_url": "https://anb-baby.myshopify.com/products/diono-radian-3rx-all-in-one-convertible-car-seat-2020-edition",
      "source_read_at": "2026-09-25T04:22:45.425Z"
    },
    {
      "ref": "p4.f8",
      "product": "Britax One4Life Slim",
      "field": "owner installation",
      "value": "Owners repeatedly describe ClickTight installation as easy and secure, including one who used the seat from newborn.",
      "stated_as": "Owners repeatedly describe ClickTight installation as easy and secure, including one who used the seat from newborn.",
      "source_type": "review",
      "source_url": "https://redditrecs.com/travel-car-seat/model/britax-one4life-slim-clicktight-all-in-one-car-seat-and-booster-combo/",
      "source_read_at": "2026-10-17T22:50:52.896Z"
    },
    {
      "ref": "p4.f11",
      "product": "Britax One4Life Slim",
      "field": "width",
      "value": "The seat is 17.5 in wide and Britax says it is designed to fit three across.",
      "stated_as": "SpaceSaver™ Slim outside, spacious inside. The 17.5” seat is designed to fit 3 across without compromising on trusted Britax safety and premium comfort.",
      "source_type": "guide",
      "source_url": "https://top-stroll.myshopify.com/products/britax-one4life-slim-all-in-one-car-seat-1",
      "source_read_at": "2026-10-17T22:50:26.576Z"
    },
    {
      "ref": "p5.f6",
      "product": "Diono Radian 3QX Ultimate 3 Across All-in-One Car Seat",
      "field": "slim profile",
      "value": "The seat's 17-inch width lets three Radian seats fit across a back seat with at least 51 inches between interior door handles.",
      "stated_as": "The seat's 17-inch width lets three Radian seats fit across a back seat with at least 51 inches between interior door handles.",
      "source_type": "blog",
      "source_url": "https://parenthoodadventures.com/diono-radian-3qx-car-seat-review/",
      "source_read_at": "2026-10-18T23:47:01.837Z"
    },
    {
      "ref": "p5.f7",
      "product": "Diono Radian 3QX Ultimate 3 Across All-in-One Car Seat",
      "field": "installation time",
      "value": "Testers got a secure install in about 10 minutes and found the manual and side stickers helpful.",
      "stated_as": "Testers got a secure install in about 10 minutes and found the manual and side stickers helpful.",
      "source_type": "review",
      "source_url": "https://mommyhood101.com/diono-3qx-3qxt-review",
      "source_read_at": "2026-10-18T23:47:13.818Z"
    },
    {
      "ref": "p5.f9",
      "product": "Diono Radian 3QX Ultimate 3 Across All-in-One Car Seat",
      "field": "three-across",
      "value": "It fit two Radian 3QX seats plus an infant carrier in a mid-size SUV and, per another parent, in a 2016 Toyota Tacoma.",
      "stated_as": "It fit two Radian 3QX seats plus an infant carrier in a mid-size SUV and, per another parent, in a 2016 Toyota Tacoma.",
      "source_type": "blog",
      "source_url": "https://www.thebabyverse.org/diono-radian-3qx-4-in-1-convertible-car-seat-review-the-one-seat-solution-for-growing-families/",
      "source_read_at": "2026-10-18T23:47:20.632Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "megababiesusa-com",
        "display_name": "megababiesusa.com"
      },
      "product_id": "gid://shopify/Product/5504254312601",
      "name": "Diono Radian 3QX Ultimate 3 Across All-in-One Car Seat",
      "url": "/products/ucp/megababiesusa-com/5504254312601",
      "why": "It fit two Radian 3QX seats plus an infant carrier in a mid-size SUV and, per another parent, in a 2016 Toyota Tacoma.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "three-across",
            "value": "It fit two Radian 3QX seats plus an infant carrier in a mid-size SUV and, per another parent, in a 2016 Toyota Tacoma.",
            "stated_as": "It fit two Radian 3QX seats plus an infant carrier in a mid-size SUV and, per another parent, in a 2016 Toyota Tacoma.",
            "source_type": "blog",
            "source_url": "https://www.thebabyverse.org/diono-radian-3qx-4-in-1-convertible-car-seat-review-the-one-seat-solution-for-growing-families/",
            "source_read_at": "2026-10-18T23:47:20.632Z"
          }
        },
        {
          "column": "Width",
          "fact": {
            "field": "slim profile",
            "value": "The seat's 17-inch width lets three Radian seats fit across a back seat with at least 51 inches between interior door handles.",
            "stated_as": "The seat's 17-inch width lets three Radian seats fit across a back seat with at least 51 inches between interior door handles.",
            "source_type": "blog",
            "source_url": "https://parenthoodadventures.com/diono-radian-3qx-car-seat-review/",
            "source_read_at": "2026-10-18T23:47:01.837Z"
          }
        },
        {
          "column": "Installation",
          "fact": {
            "field": "installation time",
            "value": "Testers got a secure install in about 10 minutes and found the manual and side stickers helpful.",
            "stated_as": "Testers got a secure install in about 10 minutes and found the manual and side stickers helpful.",
            "source_type": "review",
            "source_url": "https://mommyhood101.com/diono-3qx-3qxt-review",
            "source_read_at": "2026-10-18T23:47:13.818Z"
          }
        }
      ],
      "recall": {
        "status": "found",
        "edition": 1,
        "index_read_at": "2026-09-25T21:56:43.040Z",
        "notices_fetched_at": "2026-09-25T15:02:47.095Z",
        "meaning": "This listing is the brand and model a regulator's notice names. Two AI models judged it so independently. It does not mean the unit on sale is from an affected batch, that the store knew, or that the product is illegal where the store sells it; a US recall does not bind an Australian store. The notice may cover only some serial numbers or dates of manufacture, which a listing does not show. RoboTrunk never limits or blocks a purchase over a notice; read the notice and decide.",
        "notices": [
          {
            "key": "health-canada:76660",
            "regulator": "health-canada",
            "regulator_label": "Health Canada and Transport Canada",
            "id": "76660",
            "title": "Transport Canada Recall - 2024718 - DIONO",
            "date": "2024-11-25",
            "url": "https://recalls-rappels.canada.ca/en/alert-recall/transport-canada-recall-2024718-diono",
            "kind": "recall",
            "batch_limited": true,
            "needs_testing": false
          }
        ]
      }
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "megababiesusa-com",
        "display_name": "megababiesusa.com"
      },
      "product_id": "gid://shopify/Product/8648873214206",
      "name": "Britax One4Life Slim",
      "url": "/products/ucp/megababiesusa-com/8648873214206",
      "why": "The seat is 17.5 in wide and Britax says it is designed to fit three across.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "width",
            "value": "The seat is 17.5 in wide and Britax says it is designed to fit three across.",
            "stated_as": "SpaceSaver™ Slim outside, spacious inside. The 17.5” seat is designed to fit 3 across without compromising on trusted Britax safety and premium comfort.",
            "source_type": "guide",
            "source_url": "https://top-stroll.myshopify.com/products/britax-one4life-slim-all-in-one-car-seat-1",
            "source_read_at": "2026-10-17T22:50:26.576Z"
          }
        },
        {
          "column": "Width",
          "fact": {
            "field": "width",
            "value": "The seat is 17.5 in wide and Britax says it is designed to fit three across.",
            "stated_as": "SpaceSaver™ Slim outside, spacious inside. The 17.5” seat is designed to fit 3 across without compromising on trusted Britax safety and premium comfort.",
            "source_type": "guide",
            "source_url": "https://top-stroll.myshopify.com/products/britax-one4life-slim-all-in-one-car-seat-1",
            "source_read_at": "2026-10-17T22:50:26.576Z"
          }
        },
        {
          "column": "Installation",
          "fact": {
            "field": "owner installation",
            "value": "Owners repeatedly describe ClickTight installation as easy and secure, including one who used the seat from newborn.",
            "stated_as": "Owners repeatedly describe ClickTight installation as easy and secure, including one who used the seat from newborn.",
            "source_type": "review",
            "source_url": "https://redditrecs.com/travel-car-seat/model/britax-one4life-slim-clicktight-all-in-one-car-seat-and-booster-combo/",
            "source_read_at": "2026-10-17T22:50:52.896Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "anbbaby-com",
        "display_name": "anbbaby.com"
      },
      "product_id": "gid://shopify/Product/8558162084126",
      "name": "Diono Radian 3R SafePlus",
      "url": "/products/ucp/anbbaby-com/8558162084126",
      "why": "The retailer says the slim-fit design permits three seats across in most midsize vehicles.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "Three-across fit",
            "value": "The retailer says the slim-fit design permits three seats across in most midsize vehicles.",
            "stated_as": "the slim-fit design allows three seats across in most mid-sized vehicles",
            "source_type": "guide",
            "source_url": "https://anb-baby.myshopify.com/products/diono-radian-3-r-safe-convertible-car-seat",
            "source_read_at": "2026-09-25T04:25:52.115Z"
          }
        },
        {
          "column": "Width",
          "fact": {
            "field": "Dimensions",
            "value": "It measures 28.5 in high by 17 in wide by 16 in deep unfolded, and 11.5 in deep folded.",
            "stated_as": "Unfolded Dimensions:\n28.5\" H x 17\" W x 16\" D\nFolded Dimensions:\n28.5\" H x 17\" W x 11.5\" D",
            "source_type": "guide",
            "source_url": "https://anb-baby.myshopify.com/products/diono-radian-3-r-safe-convertible-car-seat",
            "source_read_at": "2026-09-25T04:25:52.115Z"
          }
        },
        {
          "column": "Installation",
          "fact": null
        }
      ]
    },
    {
      "rank": 4,
      "merchant": {
        "slug": "albeebaby-com",
        "display_name": "albeebaby.com"
      },
      "product_id": "gid://shopify/Product/9480102150375",
      "name": "Nuna EXEC Next All-In-One Convertible Car Seat",
      "url": "/products/ucp/albeebaby-com/9480102150375",
      "why": "The slim design fits 3 across in most mid-sized vehicles.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "Fitting three across",
            "value": "The slim design fits 3 across in most mid-sized vehicles.",
            "stated_as": "Slim design fits 3 across in most mid-sized vehicles",
            "source_type": "listing",
            "source_url": "https://dd1dfe-a3.myshopify.com/products.json",
            "source_read_at": "2026-10-08T19:02:14.639Z"
          }
        },
        {
          "column": "Width",
          "fact": null
        },
        {
          "column": "Installation",
          "fact": null
        }
      ]
    },
    {
      "rank": 5,
      "merchant": {
        "slug": "anbbaby-com",
        "display_name": "anbbaby.com"
      },
      "product_id": "gid://shopify/Product/4510182211670",
      "name": "DIONO Radian 3RX",
      "url": "/products/ucp/anbbaby-com/4510182211670",
      "why": "The store says three seats will most likely fit when the rear row measures at least 51 inches (129.6 cm) between armrests; vehicle-belt installation may be necessary.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "Three-across fit",
            "value": "The store says three seats will most likely fit when the rear row measures at least 51 inches (129.6 cm) between armrests; vehicle-belt installation may be necessary.",
            "stated_as": "Most likely, yes, as long as you have 51″ (129.6 cm) in the back row from vehicle armrest to armrest. It may be necessary to install all three using the vehicle seat belt system..",
            "source_type": "guide",
            "source_url": "https://anb-baby.myshopify.com/products/diono-radian-3rx-all-in-one-convertible-car-seat-2020-edition",
            "source_read_at": "2026-09-25T04:22:45.425Z"
          }
        },
        {
          "column": "Width",
          "fact": null
        },
        {
          "column": "Installation",
          "fact": null
        }
      ]
    }
  ]
}