{
  "schema_version": "compare-page.v2",
  "page_id": "frame-mounted-rear-child-bike-seats-frame-fit-compared",
  "url": "https://robotrunk.com/compare/want/frame-mounted-rear-child-bike-seats-frame-fit-compared",
  "title": "Frame-mounted rear child bike seats: frame fit compared",
  "question": "Which frame-mounted rear child bike seat is likely to fit a particular bicycle frame?",
  "answer": "THULE Yepp Nexxt Maxi: The installation diagrams specify a 27.2–40 mm round-tube range or a maximum 40 × 55 mm section, with 44 mm and 58 mm M6 bolts shown for the respective fit. The exact frame-mounted seat required little seat assembly beyond removing packaging and routing the support bars. Mounting the block used four of the supplied bolts and the included Allen key; two bolt lengths were supplied for different tube thicknesses.\nThule Yepp 2 Maxi: Thule says the supplied quick-release bracket fits most round and oval bicycle frames, but recommends checking model-specific compatibility. The universal quick-release bracket is designed to let the seat be installed or removed in seconds and moved between compatible bicycles.\nTHULE Yepp Maxi: The clamp fit a large compact-geometry Whyte Stirling well, but the reviewer cautioned that small compact frames may lack seat-tube space or put the child close to the rider's saddle. Installation on a 15-inch Specialized Rockhopper took about 30 minutes and the mount interfered with the seatpost quick release; the tester would not want to repeat the process.\nThule Yepp 2 Mini: The user warns that the seat is not universal and reports concerns with carbon frames, very short head tubes and cables routed through the stem; checking the specific bicycle with a dealer is advised. On a trekking Cannondale, installation reportedly took about 15 minutes including reading the instructions and required only a hex key. Fit may be harder or impossible on other bicycles.",
  "kind": "bike seats, trailers & wagons",
  "market": "US",
  "generated_at": "2026-10-09T15:21:54.034Z",
  "columns": [
    "Frame fit",
    "Mounting",
    "Weight"
  ],
  "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.f9",
      "product": "THULE Yepp Maxi",
      "field": "small-frame clearance",
      "value": "The clamp fit a large compact-geometry Whyte Stirling well, but the reviewer cautioned that small compact frames may lack seat-tube space or put the child close to the rider's saddle.",
      "stated_as": "The clamp fit a large compact-geometry Whyte Stirling well, but the reviewer cautioned that small compact frames may lack seat-tube space or put the child close to the rider's saddle.",
      "source_type": "review",
      "source_url": "https://www.cyclist.co.uk/reviews/thule-yepp-maxi-bike-seat-review",
      "source_read_at": "2026-09-27T10:19:11.950Z"
    },
    {
      "ref": "p1.f12",
      "product": "THULE Yepp Maxi",
      "field": "frame-mount installation",
      "value": "Installation on a 15-inch Specialized Rockhopper took about 30 minutes and the mount interfered with the seatpost quick release; the tester would not want to repeat the process.",
      "stated_as": "Installation on a 15-inch Specialized Rockhopper took about 30 minutes and the mount interfered with the seatpost quick release; the tester would not want to repeat the process.",
      "source_type": "review",
      "source_url": "https://rascalrides.com/thule-yepp-maxi-bike-seat-review/",
      "source_read_at": "2026-09-27T10:18:43.495Z"
    },
    {
      "ref": "p2.f4",
      "product": "Thule Yepp 2 Maxi",
      "field": "weight",
      "value": "Thule lists the seat weight as 5 kg; the store rounds this to 11 lb.",
      "stated_as": "Poids 5 kg",
      "source_type": "guide",
      "source_url": "https://www.thule.com/fr-ca/child-bike-seats/rear-mounted-child-bike-seats/thule-yepp-2-maxi-_-12021301",
      "source_read_at": "2026-09-27T09:47:11.137Z"
    },
    {
      "ref": "p2.f5",
      "product": "Thule Yepp 2 Maxi",
      "field": "installation",
      "value": "The universal quick-release bracket is designed to let the seat be installed or removed in seconds and moved between compatible bicycles.",
      "stated_as": "The seat can be mounted and dismounted from the bike in seconds with the universal quick-release bracket, making it easy to switch between different bikes",
      "source_type": "guide",
      "source_url": "https://anb-baby.myshopify.com/products/thule-yepp-2-maxi-frame-mount-child-bike-seat",
      "source_read_at": "2026-09-27T09:47:02.834Z"
    },
    {
      "ref": "p2.f6",
      "product": "Thule Yepp 2 Maxi",
      "field": "frame compatibility",
      "value": "Thule says the supplied quick-release bracket fits most round and oval bicycle frames, but recommends checking model-specific compatibility.",
      "stated_as": "Ela inclui um suporte de liberação rápida compatível com a maioria dos quadros de bicicleta redondos e ovais.",
      "source_type": "guide",
      "source_url": "https://www.thule.com/pt-br/products/-_-12021301",
      "source_read_at": "2026-09-27T09:47:07.567Z"
    },
    {
      "ref": "p3.f1",
      "product": "Thule Yepp 2 Mini",
      "field": "weight",
      "value": "The seat weighs 5.3 lb.",
      "stated_as": "Weight:\n5.3 lbs",
      "source_type": "guide",
      "source_url": "https://anb-baby.myshopify.com/products/thule-yepp-2-mini-front-mounted-child-bike-seat",
      "source_read_at": "2026-09-27T10:14:54.483Z"
    },
    {
      "ref": "p3.f3",
      "product": "Thule Yepp 2 Mini",
      "field": "installation",
      "value": "On a trekking Cannondale, installation reportedly took about 15 minutes including reading the instructions and required only a hex key. Fit may be harder or impossible on other bicycles.",
      "stated_as": "On a trekking Cannondale, installation reportedly took about 15 minutes including reading the instructions and required only a hex key. Fit may be harder or impossible on other bicycles.",
      "source_type": "review",
      "source_url": "https://www.promaminky.cz/clanky/miminko-0-1-rok-177/thule-yepp-2-mini-nase-zkusenost-po-dvou-mesicich-jezdeni-1420",
      "source_read_at": "2026-09-27T10:15:12.309Z"
    },
    {
      "ref": "p3.f6",
      "product": "Thule Yepp 2 Mini",
      "field": "bike compatibility",
      "value": "The user warns that the seat is not universal and reports concerns with carbon frames, very short head tubes and cables routed through the stem; checking the specific bicycle with a dealer is advised.",
      "stated_as": "The user warns that the seat is not universal and reports concerns with carbon frames, very short head tubes and cables routed through the stem; checking the specific bicycle with a dealer is advised.",
      "source_type": "review",
      "source_url": "https://www.promaminky.cz/clanky/miminko-0-1-rok-177/thule-yepp-2-mini-nase-zkusenost-po-dvou-mesicich-jezdeni-1420",
      "source_read_at": "2026-09-27T10:15:12.309Z"
    },
    {
      "ref": "p4.f5",
      "product": "THULE Yepp Nexxt Maxi",
      "field": "assembly and tools",
      "value": "The exact frame-mounted seat required little seat assembly beyond removing packaging and routing the support bars. Mounting the block used four of the supplied bolts and the included Allen key; two bolt lengths were supplied for different tube thicknesses.",
      "stated_as": "The exact frame-mounted seat required little seat assembly beyond removing packaging and routing the support bars. Mounting the block used four of the supplied bolts and the included Allen key; two bolt lengths were supplied for different tube thicknesses.",
      "source_type": "review",
      "source_url": "https://www.youtube.com/watch?v=759KN1DmUdM",
      "source_read_at": "2026-09-27T10:37:04.085Z"
    },
    {
      "ref": "p4.f7",
      "product": "THULE Yepp Nexxt Maxi",
      "field": "mount dimensions",
      "value": "The installation diagrams specify a 27.2–40 mm round-tube range or a maximum 40 × 55 mm section, with 44 mm and 58 mm M6 bolts shown for the respective fit.",
      "stated_as": "Ø 27.2-40 mm        40x55 mm\n        Ø 1.07-1.57”        1.57-2.16”\n\n\n\n\n        M6x44               M6x58\n        M6x1.7”             M6x2.3”",
      "source_type": "manual",
      "source_url": "https://www.thule.com/-/s/approved/std.lang.all/65/23/686523.pdf",
      "source_read_at": "2026-09-27T10:35:31.020Z"
    },
    {
      "ref": "p4.f9",
      "product": "THULE Yepp Nexxt Maxi",
      "field": "weight",
      "value": "The seat weighs 4.6 kg.",
      "stated_as": "Weight 4.6 kg",
      "source_type": "guide",
      "source_url": "https://www.thule.com/en-nz/child-bike-seats/rear-mounted-child-bike-seats/thule-yepp-nexxt-maxi-_-12080222",
      "source_read_at": "2026-09-27T10:35:28.525Z"
    },
    {
      "ref": "p4.f10",
      "product": "THULE Yepp Nexxt Maxi",
      "field": "installation torque",
      "value": "The mounting diagram specifies tightening four bracket fasteners to 8 Nm.",
      "stated_as": "8 Nm\n\n\n                    x4",
      "source_type": "manual",
      "source_url": "https://www.thule.com/-/s/approved/std.lang.all/65/23/686523.pdf",
      "source_read_at": "2026-09-27T10:35:31.020Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "anbbaby-com",
        "display_name": "anbbaby.com"
      },
      "product_id": "gid://shopify/Product/4699359510614",
      "name": "THULE Yepp Nexxt Maxi",
      "url": "/products/ucp/anbbaby-com/4699359510614",
      "why": "The installation diagrams specify a 27.2–40 mm round-tube range or a maximum 40 × 55 mm section, with 44 mm and 58 mm M6 bolts shown for the respective fit.",
      "cells": [
        {
          "column": "Frame fit",
          "fact": {
            "field": "mount dimensions",
            "value": "The installation diagrams specify a 27.2–40 mm round-tube range or a maximum 40 × 55 mm section, with 44 mm and 58 mm M6 bolts shown for the respective fit.",
            "stated_as": "Ø 27.2-40 mm        40x55 mm\n        Ø 1.07-1.57”        1.57-2.16”\n\n\n\n\n        M6x44               M6x58\n        M6x1.7”             M6x2.3”",
            "source_type": "manual",
            "source_url": "https://www.thule.com/-/s/approved/std.lang.all/65/23/686523.pdf",
            "source_read_at": "2026-09-27T10:35:31.020Z"
          }
        },
        {
          "column": "Mounting",
          "fact": {
            "field": "installation torque",
            "value": "The mounting diagram specifies tightening four bracket fasteners to 8 Nm.",
            "stated_as": "8 Nm\n\n\n                    x4",
            "source_type": "manual",
            "source_url": "https://www.thule.com/-/s/approved/std.lang.all/65/23/686523.pdf",
            "source_read_at": "2026-09-27T10:35:31.020Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "weight",
            "value": "The seat weighs 4.6 kg.",
            "stated_as": "Weight 4.6 kg",
            "source_type": "guide",
            "source_url": "https://www.thule.com/en-nz/child-bike-seats/rear-mounted-child-bike-seats/thule-yepp-nexxt-maxi-_-12080222",
            "source_read_at": "2026-09-27T10:35:28.525Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "anbbaby-com",
        "display_name": "anbbaby.com"
      },
      "product_id": "gid://shopify/Product/9380094116126",
      "name": "Thule Yepp 2 Maxi",
      "url": "/products/ucp/anbbaby-com/9380094116126",
      "why": "Thule says the supplied quick-release bracket fits most round and oval bicycle frames, but recommends checking model-specific compatibility.",
      "cells": [
        {
          "column": "Frame fit",
          "fact": {
            "field": "frame compatibility",
            "value": "Thule says the supplied quick-release bracket fits most round and oval bicycle frames, but recommends checking model-specific compatibility.",
            "stated_as": "Ela inclui um suporte de liberação rápida compatível com a maioria dos quadros de bicicleta redondos e ovais.",
            "source_type": "guide",
            "source_url": "https://www.thule.com/pt-br/products/-_-12021301",
            "source_read_at": "2026-09-27T09:47:07.567Z"
          }
        },
        {
          "column": "Mounting",
          "fact": {
            "field": "installation",
            "value": "The universal quick-release bracket is designed to let the seat be installed or removed in seconds and moved between compatible bicycles.",
            "stated_as": "The seat can be mounted and dismounted from the bike in seconds with the universal quick-release bracket, making it easy to switch between different bikes",
            "source_type": "guide",
            "source_url": "https://anb-baby.myshopify.com/products/thule-yepp-2-maxi-frame-mount-child-bike-seat",
            "source_read_at": "2026-09-27T09:47:02.834Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "weight",
            "value": "Thule lists the seat weight as 5 kg; the store rounds this to 11 lb.",
            "stated_as": "Poids 5 kg",
            "source_type": "guide",
            "source_url": "https://www.thule.com/fr-ca/child-bike-seats/rear-mounted-child-bike-seats/thule-yepp-2-maxi-_-12021301",
            "source_read_at": "2026-09-27T09:47:11.137Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "anbbaby-com",
        "display_name": "anbbaby.com"
      },
      "product_id": "gid://shopify/Product/4697127125078",
      "name": "THULE Yepp Maxi",
      "url": "/products/ucp/anbbaby-com/4697127125078",
      "why": "The clamp fit a large compact-geometry Whyte Stirling well, but the reviewer cautioned that small compact frames may lack seat-tube space or put the child close to the rider's saddle.",
      "cells": [
        {
          "column": "Frame fit",
          "fact": {
            "field": "small-frame clearance",
            "value": "The clamp fit a large compact-geometry Whyte Stirling well, but the reviewer cautioned that small compact frames may lack seat-tube space or put the child close to the rider's saddle.",
            "stated_as": "The clamp fit a large compact-geometry Whyte Stirling well, but the reviewer cautioned that small compact frames may lack seat-tube space or put the child close to the rider's saddle.",
            "source_type": "review",
            "source_url": "https://www.cyclist.co.uk/reviews/thule-yepp-maxi-bike-seat-review",
            "source_read_at": "2026-09-27T10:19:11.950Z"
          }
        },
        {
          "column": "Mounting",
          "fact": {
            "field": "frame-mount installation",
            "value": "Installation on a 15-inch Specialized Rockhopper took about 30 minutes and the mount interfered with the seatpost quick release; the tester would not want to repeat the process.",
            "stated_as": "Installation on a 15-inch Specialized Rockhopper took about 30 minutes and the mount interfered with the seatpost quick release; the tester would not want to repeat the process.",
            "source_type": "review",
            "source_url": "https://rascalrides.com/thule-yepp-maxi-bike-seat-review/",
            "source_read_at": "2026-09-27T10:18:43.495Z"
          }
        },
        {
          "column": "Weight",
          "fact": null
        }
      ]
    },
    {
      "rank": 4,
      "merchant": {
        "slug": "anbbaby-com",
        "display_name": "anbbaby.com"
      },
      "product_id": "gid://shopify/Product/9379969892638",
      "name": "Thule Yepp 2 Mini",
      "url": "/products/ucp/anbbaby-com/9379969892638",
      "why": "The user warns that the seat is not universal and reports concerns with carbon frames, very short head tubes and cables routed through the stem; checking the specific bicycle with a dealer is advised.",
      "cells": [
        {
          "column": "Frame fit",
          "fact": {
            "field": "bike compatibility",
            "value": "The user warns that the seat is not universal and reports concerns with carbon frames, very short head tubes and cables routed through the stem; checking the specific bicycle with a dealer is advised.",
            "stated_as": "The user warns that the seat is not universal and reports concerns with carbon frames, very short head tubes and cables routed through the stem; checking the specific bicycle with a dealer is advised.",
            "source_type": "review",
            "source_url": "https://www.promaminky.cz/clanky/miminko-0-1-rok-177/thule-yepp-2-mini-nase-zkusenost-po-dvou-mesicich-jezdeni-1420",
            "source_read_at": "2026-09-27T10:15:12.309Z"
          }
        },
        {
          "column": "Mounting",
          "fact": {
            "field": "installation",
            "value": "On a trekking Cannondale, installation reportedly took about 15 minutes including reading the instructions and required only a hex key. Fit may be harder or impossible on other bicycles.",
            "stated_as": "On a trekking Cannondale, installation reportedly took about 15 minutes including reading the instructions and required only a hex key. Fit may be harder or impossible on other bicycles.",
            "source_type": "review",
            "source_url": "https://www.promaminky.cz/clanky/miminko-0-1-rok-177/thule-yepp-2-mini-nase-zkusenost-po-dvou-mesicich-jezdeni-1420",
            "source_read_at": "2026-09-27T10:15:12.309Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "weight",
            "value": "The seat weighs 5.3 lb.",
            "stated_as": "Weight:\n5.3 lbs",
            "source_type": "guide",
            "source_url": "https://anb-baby.myshopify.com/products/thule-yepp-2-mini-front-mounted-child-bike-seat",
            "source_read_at": "2026-09-27T10:14:54.483Z"
          }
        }
      ]
    }
  ]
}