{
  "schema_version": "compare-page.v2",
  "page_id": "booster-car-seats-that-fit-three-across-e585ded1",
  "url": "https://robotrunk.com/compare/want/booster-car-seats-that-fit-three-across-e585ded1",
  "title": "Booster seats that fit three across in one back seat",
  "question": "Which booster seats fit three across in a single back seat?",
  "answer": "PEG / Peg Perego Primo Viaggio Flex 120: It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode. The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.\nDiono Connect3 RXT: Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space. A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.\nPEG Perego Viaggio Flex 120: Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.\nBritax UpNGo Click: The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
  "kind": "booster car seat",
  "market": "US",
  "generated_at": "2026-10-25T12:22:20.297Z",
  "columns": [
    "Width",
    "Three-across evidence",
    "Height and weight limits"
  ],
  "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.f2",
      "product": "Diono Connect3 RXT",
      "field": "weight and height range",
      "value": "The manual states a weight range of 40–120 lb (18–54 kg) and a height range of 38–63 in (97–160 cm).",
      "stated_as": "40–120 lb (18–54 kg)\n38–63 in (97–160 cm)",
      "source_type": "manual",
      "source_url": "https://diono.zendesk.com/hc/en-us/article_attachments/40403527661843",
      "source_read_at": "2026-10-18T22:19:27.747Z"
    },
    {
      "ref": "p1.f3",
      "product": "Diono Connect3 RXT",
      "field": "three-across fit",
      "value": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
      "stated_as": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
      "source_type": "review",
      "source_url": "https://redditrecs.com/travel-car-seat/model/diono-connect3-rxt-backless-booster-latch/",
      "source_read_at": "2026-10-18T22:20:30.223Z"
    },
    {
      "ref": "p1.f4",
      "product": "Diono Connect3 RXT",
      "field": "3-across width",
      "value": "Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space.",
      "stated_as": "Fits 3-Across – less than 17\" wide without sacrificing interior seat space.",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-18T19:37:33.814Z"
    },
    {
      "ref": "p2.f5",
      "product": "PEG / Peg Perego Primo Viaggio Flex 120",
      "field": "fit to vehicle",
      "value": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
      "stated_as": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
      "source_type": "blog",
      "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
      "source_read_at": "2026-10-15T13:08:45.665Z"
    },
    {
      "ref": "p2.f6",
      "product": "PEG / Peg Perego Primo Viaggio Flex 120",
      "field": "three-across fit",
      "value": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
      "stated_as": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
      "source_type": "blog",
      "source_url": "https://www.thecarmom.com/articles/peg-flex-120-review",
      "source_read_at": "2026-10-15T13:09:11.432Z"
    },
    {
      "ref": "p2.f10",
      "product": "PEG / Peg Perego Primo Viaggio Flex 120",
      "field": "height and limits",
      "value": "It is one of the tallest boosters on the market; the highest belt guide is 22 inches, with a 63-inch height limit and 120-pound weight limit, and no vehicle head restraint is needed.",
      "stated_as": "It is one of the tallest boosters on the market; the highest belt guide is 22 inches, with a 63-inch height limit and 120-pound weight limit, and no vehicle head restraint is needed.",
      "source_type": "blog",
      "source_url": "https://thecarcrashdetective.com/peg-perego-viaggio-flex-120-review/",
      "source_read_at": "2026-10-15T13:09:25.829Z"
    },
    {
      "ref": "p3.f7",
      "product": "PEG Perego Viaggio Flex 120",
      "field": "fit to vehicle",
      "value": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
      "stated_as": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
      "source_type": "blog",
      "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
      "source_read_at": "2026-10-10T14:48:23.570Z"
    },
    {
      "ref": "p3.f11",
      "product": "PEG Perego Viaggio Flex 120",
      "field": "height",
      "value": "It is one of the tallest boosters available, with a highest belt guide at about 22 inches, so most children can use it until they no longer need any booster.",
      "stated_as": "It is one of the tallest boosters available, with a highest belt guide at about 22 inches, so most children can use it until they no longer need any booster.",
      "source_type": "blog",
      "source_url": "https://thecarcrashdetective.com/peg-perego-viaggio-flex-120-review/",
      "source_read_at": "2026-10-10T14:48:33.382Z"
    },
    {
      "ref": "p4.f1",
      "product": "Britax UpNGo Click",
      "field": "weight and height limits",
      "value": "The UpNGo Click is designed for children from 40 to 120 lb and 46 to 63 inches tall.",
      "stated_as": "Designed for children from 40-120 lbs and 46”-63\"",
      "source_type": "listing",
      "source_url": "https://strolleria.myshopify.com/products.json",
      "source_read_at": "2026-10-12T20:06:05.806Z"
    },
    {
      "ref": "p4.f9",
      "product": "Britax UpNGo Click",
      "field": "seat width and 3-across",
      "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
      "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
      "source_type": "listing",
      "source_url": "https://strolleria.myshopify.com/products.json",
      "source_read_at": "2026-10-12T20:06:05.806Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "strolleria-com",
        "display_name": "strolleria.com"
      },
      "product_id": "gid://shopify/Product/3782284247114",
      "name": "PEG / Peg Perego Primo Viaggio Flex 120",
      "url": "/products/ucp/strolleria-com/3782284247114",
      "why": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "three-across fit",
            "value": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
            "stated_as": "It is a go-to narrow booster for tight three-across setups because it is 14 inches at the seat bottom and 17 inches at its widest in narrow mode.",
            "source_type": "blog",
            "source_url": "https://www.thecarmom.com/articles/peg-flex-120-review",
            "source_read_at": "2026-10-15T13:09:11.432Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "fit to vehicle",
            "value": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
            "stated_as": "The booster is narrow and lacks armrests, so it fit the reviewer's tricky three-across situation.",
            "source_type": "blog",
            "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
            "source_read_at": "2026-10-15T13:08:45.665Z"
          }
        },
        {
          "column": "Height and weight limits",
          "fact": {
            "field": "height and limits",
            "value": "It is one of the tallest boosters on the market; the highest belt guide is 22 inches, with a 63-inch height limit and 120-pound weight limit, and no vehicle head restraint is needed.",
            "stated_as": "It is one of the tallest boosters on the market; the highest belt guide is 22 inches, with a 63-inch height limit and 120-pound weight limit, and no vehicle head restraint is needed.",
            "source_type": "blog",
            "source_url": "https://thecarcrashdetective.com/peg-perego-viaggio-flex-120-review/",
            "source_read_at": "2026-10-15T13:09:25.829Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "megababiesusa-com",
        "display_name": "megababiesusa.com"
      },
      "product_id": "gid://shopify/Product/8673372274942",
      "name": "Diono Connect3 RXT",
      "url": "/products/ucp/megababiesusa-com/8673372274942",
      "why": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "3-across width",
            "value": "Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space.",
            "stated_as": "Fits 3-Across – less than 17\" wide without sacrificing interior seat space.",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-18T19:37:33.814Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "three-across fit",
            "value": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
            "stated_as": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
            "source_type": "review",
            "source_url": "https://redditrecs.com/travel-car-seat/model/diono-connect3-rxt-backless-booster-latch/",
            "source_read_at": "2026-10-18T22:20:30.223Z"
          }
        },
        {
          "column": "Height and weight limits",
          "fact": {
            "field": "weight and height range",
            "value": "The manual states a weight range of 40–120 lb (18–54 kg) and a height range of 38–63 in (97–160 cm).",
            "stated_as": "40–120 lb (18–54 kg)\n38–63 in (97–160 cm)",
            "source_type": "manual",
            "source_url": "https://diono.zendesk.com/hc/en-us/article_attachments/40403527661843",
            "source_read_at": "2026-10-18T22:19:27.747Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "albeebaby-com",
        "display_name": "albeebaby.com"
      },
      "product_id": "gid://shopify/Product/9564437938407",
      "name": "PEG Perego Viaggio Flex 120",
      "url": "/products/ucp/albeebaby-com/9564437938407",
      "why": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
      "cells": [
        {
          "column": "Width",
          "fact": null
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "fit to vehicle",
            "value": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
            "stated_as": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
            "source_type": "blog",
            "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
            "source_read_at": "2026-10-10T14:48:23.570Z"
          }
        },
        {
          "column": "Height and weight limits",
          "fact": {
            "field": "height",
            "value": "It is one of the tallest boosters available, with a highest belt guide at about 22 inches, so most children can use it until they no longer need any booster.",
            "stated_as": "It is one of the tallest boosters available, with a highest belt guide at about 22 inches, so most children can use it until they no longer need any booster.",
            "source_type": "blog",
            "source_url": "https://thecarcrashdetective.com/peg-perego-viaggio-flex-120-review/",
            "source_read_at": "2026-10-10T14:48:33.382Z"
          }
        }
      ]
    },
    {
      "rank": 4,
      "merchant": {
        "slug": "strolleria-com",
        "display_name": "strolleria.com"
      },
      "product_id": "gid://shopify/Product/8008999993418",
      "name": "Britax UpNGo Click",
      "url": "/products/ucp/strolleria-com/8008999993418",
      "why": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "seat width and 3-across",
            "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
            "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "seat width and 3-across",
            "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
            "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        },
        {
          "column": "Height and weight limits",
          "fact": {
            "field": "weight and height limits",
            "value": "The UpNGo Click is designed for children from 40 to 120 lb and 46 to 63 inches tall.",
            "stated_as": "Designed for children from 40-120 lbs and 46”-63\"",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        }
      ]
    }
  ]
}