{
  "schema_version": "compare-page.v2",
  "page_id": "convertible-car-seats-that-fit-three-across",
  "url": "https://robotrunk.com/compare/want/convertible-car-seats-that-fit-three-across",
  "title": "Convertible car seats for fitting three across in one back seat",
  "question": "Which convertible car seats are suited to fitting three across in a single back seat?",
  "answer": "DIONO Radian 3RX: This is an all-in-one convertible car seat with a steel core, designed for narrow three-across arrangements. 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.\nGraco SlimFit3 LX 3-in-1: At 16.7 inches wide, the reviewer calls it one of the narrowest convertible car seats and says if it does not fit a tight setup, likely nothing else will. Graco confirmed that three SlimFit3 LX seats fit three-across in a 2019-2021 Toyota RAV4 in several configurations, including all forward-facing, all rear-facing, and mixed modes.\nBritax One4Life Slim: The seat is 17.5 in wide and Britax says it is designed to fit three across. The review rates it 4.8 out of 5 and calls it a strong choice, especially for fitting three seats across.",
  "kind": "convertible car seat",
  "market": "US",
  "generated_at": "2026-10-21T14:00:38.211Z",
  "columns": [
    "Width",
    "Three-across fit",
    "Weight range"
  ],
  "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.f4",
      "product": "Graco SlimFit3 LX 3-in-1",
      "field": "width",
      "value": "The seat is about 16.7 inches wide at the shoulders, with a base about 11.5 inches wide, making it one of the narrowest convertible seats tested.",
      "stated_as": "The seat is about 16.7 inches wide at the shoulders, with a base about 11.5 inches wide, making it one of the narrowest convertible seats tested.",
      "source_type": "review",
      "source_url": "https://csftl.org/graco-slimfit3-lx-review/",
      "source_read_at": "2026-10-09T23:08:41.882Z"
    },
    {
      "ref": "p1.f8",
      "product": "Graco SlimFit3 LX 3-in-1",
      "field": "narrowness",
      "value": "At 16.7 inches wide, the reviewer calls it one of the narrowest convertible car seats and says if it does not fit a tight setup, likely nothing else will.",
      "stated_as": "At 16.7 inches wide, the reviewer calls it one of the narrowest convertible car seats and says if it does not fit a tight setup, likely nothing else will.",
      "source_type": "blog",
      "source_url": "https://www.thecarmom.com/articles/graco-slimfit3-lx-3-review",
      "source_read_at": "2026-10-09T23:09:23.024Z"
    },
    {
      "ref": "p1.f9",
      "product": "Graco SlimFit3 LX 3-in-1",
      "field": "RAV4 fit",
      "value": "Graco confirmed that three SlimFit3 LX seats fit three-across in a 2019-2021 Toyota RAV4 in several configurations, including all forward-facing, all rear-facing, and mixed modes.",
      "stated_as": "Graco confirmed that three SlimFit3 LX seats fit three-across in a 2019-2021 Toyota RAV4 in several configurations, including all forward-facing, all rear-facing, and mixed modes.",
      "source_type": "blog",
      "source_url": "https://carseatblog.com/53035/narrow-car-seat-for-2019-21-toyota-rav4-hybrid-prime-graco-slimfit3-lx/",
      "source_read_at": "2026-10-09T23:09:27.359Z"
    },
    {
      "ref": "p1.f10",
      "product": "Graco SlimFit3 LX 3-in-1",
      "field": "rear-facing limits",
      "value": "Rear-facing with harness: 5-40 lb, and the child's head must be at least 1 inch below the headrest adjustment handle.",
      "stated_as": "Rear-Facing Harness: 5-40 lb, head must be at least 1\" below handle",
      "source_type": "listing",
      "source_url": "https://dd1dfe-a3.myshopify.com/products.json",
      "source_read_at": "2026-10-09T19:03:04.916Z"
    },
    {
      "ref": "p2.f1",
      "product": "DIONO Radian 3RX",
      "field": "Purpose and construction",
      "value": "This is an all-in-one convertible car seat with a steel core, designed for narrow three-across arrangements.",
      "stated_as": "designed to fit 3 across and with our famous steel core inside for optimum safety.",
      "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": "p2.f2",
      "product": "DIONO Radian 3RX",
      "field": "Rear-facing limits",
      "value": "Rear-facing use is listed for children weighing 5–50 lb (2.3–22.7 kg).",
      "stated_as": "Rear-facing\n5-50 lbs / 2.3-22.7 kg",
      "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": "p2.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": "p3.f7",
      "product": "Britax One4Life Slim",
      "field": "overall verdict",
      "value": "The review rates it 4.8 out of 5 and calls it a strong choice, especially for fitting three seats across.",
      "stated_as": "The review rates it 4.8 out of 5 and calls it a strong choice, especially for fitting three seats across.",
      "source_type": "review",
      "source_url": "https://mommyhood101.com/britax-one4life-review",
      "source_read_at": "2026-10-17T22:50:46.278Z"
    },
    {
      "ref": "p3.f10",
      "product": "Britax One4Life Slim",
      "field": "weight ranges",
      "value": "It converts from rear-facing infant/toddler use at 5–50 lb to forward-facing at 30–65 lb and high-back booster at 40–120 lb.",
      "stated_as": "It easily converts from a rear-facing infant and toddler seat (5-50 lbs.) to a forward-facing seat (30-65 lbs.) to a high-back booster seat (40-120 lbs.)",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-17T19:35:52.669Z"
    },
    {
      "ref": "p3.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"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "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": "This is an all-in-one convertible car seat with a steel core, designed for narrow three-across arrangements.",
      "cells": [
        {
          "column": "Width",
          "fact": null
        },
        {
          "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": "Weight range",
          "fact": {
            "field": "Rear-facing limits",
            "value": "Rear-facing use is listed for children weighing 5–50 lb (2.3–22.7 kg).",
            "stated_as": "Rear-facing\n5-50 lbs / 2.3-22.7 kg",
            "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"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "albeebaby-com",
        "display_name": "albeebaby.com"
      },
      "product_id": "gid://shopify/Product/9685796585703",
      "name": "Graco SlimFit3 LX 3-in-1",
      "url": "/products/ucp/albeebaby-com/9685796585703",
      "why": "Graco confirmed that three SlimFit3 LX seats fit three-across in a 2019-2021 Toyota RAV4 in several configurations, including all forward-facing, all rear-facing, and mixed modes.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "width",
            "value": "The seat is about 16.7 inches wide at the shoulders, with a base about 11.5 inches wide, making it one of the narrowest convertible seats tested.",
            "stated_as": "The seat is about 16.7 inches wide at the shoulders, with a base about 11.5 inches wide, making it one of the narrowest convertible seats tested.",
            "source_type": "review",
            "source_url": "https://csftl.org/graco-slimfit3-lx-review/",
            "source_read_at": "2026-10-09T23:08:41.882Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": {
            "field": "RAV4 fit",
            "value": "Graco confirmed that three SlimFit3 LX seats fit three-across in a 2019-2021 Toyota RAV4 in several configurations, including all forward-facing, all rear-facing, and mixed modes.",
            "stated_as": "Graco confirmed that three SlimFit3 LX seats fit three-across in a 2019-2021 Toyota RAV4 in several configurations, including all forward-facing, all rear-facing, and mixed modes.",
            "source_type": "blog",
            "source_url": "https://carseatblog.com/53035/narrow-car-seat-for-2019-21-toyota-rav4-hybrid-prime-graco-slimfit3-lx/",
            "source_read_at": "2026-10-09T23:09:27.359Z"
          }
        },
        {
          "column": "Weight range",
          "fact": {
            "field": "rear-facing limits",
            "value": "Rear-facing with harness: 5-40 lb, and the child's head must be at least 1 inch below the headrest adjustment handle.",
            "stated_as": "Rear-Facing Harness: 5-40 lb, head must be at least 1\" below handle",
            "source_type": "listing",
            "source_url": "https://dd1dfe-a3.myshopify.com/products.json",
            "source_read_at": "2026-10-09T19:03:04.916Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "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": "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": "Three-across fit",
          "fact": {
            "field": "overall verdict",
            "value": "The review rates it 4.8 out of 5 and calls it a strong choice, especially for fitting three seats across.",
            "stated_as": "The review rates it 4.8 out of 5 and calls it a strong choice, especially for fitting three seats across.",
            "source_type": "review",
            "source_url": "https://mommyhood101.com/britax-one4life-review",
            "source_read_at": "2026-10-17T22:50:46.278Z"
          }
        },
        {
          "column": "Weight range",
          "fact": {
            "field": "weight ranges",
            "value": "It converts from rear-facing infant/toddler use at 5–50 lb to forward-facing at 30–65 lb and high-back booster at 40–120 lb.",
            "stated_as": "It easily converts from a rear-facing infant and toddler seat (5-50 lbs.) to a forward-facing seat (30-65 lbs.) to a high-back booster seat (40-120 lbs.)",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-17T19:35:52.669Z"
          }
        }
      ]
    }
  ]
}