THULE Sleek Stroller Sibling Seat | live price, prepared checkout

Built for shopping agents: what RoboTrunk does for every product

We asked shopping agents, including Meta's Muse first-hand, what they need from a store. This is what they asked for, and what we have built.

RoboTrunk is working through its catalogue, so a step may not be done for this one yet. Where a step is done per product, the line ends with what is done for this product.

• Deep research: We read the maker's manual, independent reviews, video review transcripts and the store's own page, and publish each finding with its source and the date read. check_product returns them with a source for each. This product: 19 checked facts, research depth trimmed read, checked 2026-09-27T09:13:09.682Z, in the evidence pack.
• Receipts: Every published fact has a receipt showing its source quote. check_product and get_product return the checked facts that have one. This product: each checked fact listed below has one; the source quotes are in the evidence pack.
• Safety: check_product asks the product-safety regulators live (US CPSC, NHTSA and FDA, Health Canada, the UK's OPSS, Australia's ACCC) whether a recall names a product, listed here or not, and flags a match with its notice; a recall never blocks the buyer. This product: this page holds no recall result for it yet; check_product asks the regulators now.
• Recall watch: watch_recalls tells the buyer if a product bought here is recalled later.
• Second-hand listings: check_listing runs the same recall check on a second-hand listing someone found, and adds what the listing leaves out and the price new.
• The real price: The full price to the buyer's country, with shipping and tax, each part quoted from the store's policy or, where a part is not settled, what the total depends on: check_product and search_catalog take the buyer's country and postcode. This product: this store's price was read from its catalogue at 2026-10-18T19:50:07.465Z.
• A checkout that finishes: RoboTrunk lists only stores whose agent checkout it has verified. create_checkout prepares the order at the store; complete_checkout returns a link to the store's own checkout. The checkout can be finished in either of two ways: the person taps the link in their own browser, or their agent opens it and completes the checkout. RoboTrunk checks the store's total against a budget ceiling before it issues the link. Payment always happens on the store's own page, and RoboTrunk never holds the money. No store pays for placement; RoboTrunk may earn a commission from some stores via their affiliate programs.
• Markdown copy: Every page has a Markdown copy: this page's copy.
• Photos and ratings: Search results carry the product photo and, where the store's own page publishes one, its rating (search_catalog).
• Fit answers: check_fit answers whether a listing fits a car, pram or bottle, with the exact quote from the store's page, or says it is not known.
• Back-in-stock watches: watch_back_in_stock starts a watch on a listing the store shows as sold out; get_back_in_stock_watch shows when it is back in stock.
• Maker's manual: ask_product_manual answers from the maker's manual with the exact passage and page, or says the manual does not cover it.
• Tools and guide: Every tool and its description is at https://robotrunk.com/mcp; the guide is at /agents.md.
• Research from other stores: Coming soon: reading other stores' listings of the same product as research sources.

Checked facts

Each fact below was checked against the source it cites before it was published. Each carries that source's link and the time RoboTrunk read it. 19 checked facts, checked 2026-09-27T09:13:09.682Z. Research depth: trimmed read. Deep read: the store's own data and 9 outside pages (the store's own product page; maker page; manual; review; regulator recall search (CPSC (United States)); regulator recall search (Health Canada); regulator recall search (ACCC Product Safety Australia)), each read in full by RoboTrunk and trimmed to its main content, then written up and checked. Facts from the maker or a manual quote the page word for word; what real users report is summarised with a link to the page read. Recall status was checked directly with CPSC (United States), Health Canada, ACCC Product Safety Australia: The supplied CPSC search found only an unrelated 2012 Chariot trailer recall, and the recent Australian feed contained no Thule recall. Health Canada lists recalls for Thule Sleek strollers and a Thule Sleek car-seat adapter, but the supplied summaries do not name sibling-seat models 11000200, 11000201 or 11000210. The related 2020 stroller recall should be checked against the base stroller before use.

• variants: The store lists Alu/Grey Melange as 11000200, Alu/Midnight Black as 11000201 and Black/Grey Melange as 11000210.. Source: https://anb-baby.myshopify.com/products.json (listing), read 2026-09-26T19:02:39.629Z.
• purpose: The sibling seat converts a Thule Sleek into a double stroller.. Source: https://anb-baby.myshopify.com/products/thule-sleek-stroller-sibling-seat (guide), read 2026-09-27T09:08:14.365Z.
• model and colour: The maker identifies this variant as model 11000210 in Gray melange on black.. Source: https://www.thule.com/da-dk/strollers/strollers-accessories/thule-sleek-sibling-seat-_-11000210 (guide), read 2026-09-27T09:08:18.533Z.
• compatibility: Model 11000210 is compatible with the Thule Sleek stroller.. Source: https://www.thule.com/pt-br/strollers/strollers-accessories/thule-sleek-sibling-seat-_-11000210 (guide), read 2026-09-27T09:08:19.800Z.
• weight limit: The sibling seat has a 15 kg/33 lb child limit; approved two-seat configurations depend on the other seat and its position.. Source: https://www.thule.com/-/s/approved/std.lang.all/14/33/621433.pdf?rev=9.1 (manual), read 2026-09-27T09:08:22.338Z.
• installation: The review says the sibling seat needs the included adapters, but describes attaching, removing and reversing the seat as easy.. Source: https://strollerinsider.com/thule-sleek-review/ (review), read 2026-09-27T09:10:08.605Z.
• canopy: The seat has an extendable, ventilated canopy with a peekaboo window, sun visor and UPF 50+ protection.. Source: https://anb-baby.myshopify.com/products/thule-sleek-stroller-sibling-seat (guide), read 2026-09-27T09:08:14.365Z.
• dimensions: Model 11000210 measures 83 × 43.5 × 25.5 cm.. Source: https://www.thule.com/da-dk/strollers/strollers-accessories/thule-sleek-sibling-seat-_-11000210 (guide), read 2026-09-27T09:08:18.533Z.
• country of origin: Model 11000210 is made in Poland.. Source: https://www.thule.com/pt-br/strollers/strollers-accessories/thule-sleek-sibling-seat-_-11000210 (guide), read 2026-09-27T09:08:19.800Z.
• included components: The package includes the sibling seat, rain cover, and upper and lower adapters.. Source: https://www.thule.com/-/s/approved/std.lang.all/14/33/621433.pdf?rev=9.1 (manual), read 2026-09-27T09:08:22.338Z.
• comfort: The review describes the toddler/sibling seat as fully padded with soft fabric and says its three-position recline includes a near-flat nap position.. Source: https://strollerinsider.com/thule-sleek-review/ (review), read 2026-09-27T09:10:08.605Z.
• comfort and footrest: The seat is described as large and comfortable, with generous sitting height and an adjustable footwell.. Source: https://anb-baby.myshopify.com/products/thule-sleek-stroller-sibling-seat (guide), read 2026-09-27T09:08:14.365Z.
• weight: Model 11000210 weighs 3.1 kg.. Source: https://www.thule.com/da-dk/strollers/strollers-accessories/thule-sleek-sibling-seat-_-11000210 (guide), read 2026-09-27T09:08:18.533Z.
• seat orientation: The seat can face the parent or face forward.. Source: https://www.thule.com/pt-br/strollers/strollers-accessories/thule-sleek-sibling-seat-_-11000210 (guide), read 2026-09-27T09:08:19.800Z.
• double configuration: The review reports enough space between two seats to recline them and says either seat can be reclined with one hand.. Source: https://strollerinsider.com/thule-sleek-review/ (review), read 2026-09-27T09:10:08.605Z.
• recline: The seat reclines to three positions for upright sitting, resting and sleeping.. Source: https://anb-baby.myshopify.com/products/thule-sleek-stroller-sibling-seat (guide), read 2026-09-27T09:08:14.365Z.
• warranty: The Danish maker page states that EU consumers receive the applicable statutory warranty, independently of any extra Thule commercial warranty.. Source: https://www.thule.com/da-dk/strollers/strollers-accessories/thule-sleek-sibling-seat-_-11000210 (guide), read 2026-09-27T09:08:18.533Z.
• bulk and transport: The review characterizes the complete Sleek stroller as bulkier and heavier than the Thule Spring; removing a seat reduces weight when only one child is riding.. Source: https://strollerinsider.com/thule-sleek-review/ (review), read 2026-09-27T09:10:08.605Z.
• bumper bar: The bumper bar swings aside to make seating the child easier.. Source: https://anb-baby.myshopify.com/products/thule-sleek-stroller-sibling-seat (guide), read 2026-09-27T09:08:14.365Z.

The full evidence pack, with every citation, source and gap.

Questions we researched but could not confirm

Every fact above is cited. To find them we read the store listing, the maker's page, the manual, owner reviews and the recall records of CPSC (United States), Health Canada and ACCC Product Safety Australia. We also chased the questions below across those sources and found no reliable answer, so you know exactly where the evidence ends and never have to guess.

• What are the frame, upholstery and padding materials?
• How thick is the seat padding?
• Does the frame finish scratch, chip or rub off?
• What tools, if any, are needed for installation?
• How long does initial installation take?
• Can the stroller fold with the sibling seat attached?
• Does the sibling seat rub or protrude in any approved configuration?
• What parts most often wear out or break?
• Is model 11000210 affected by the Thule Sleek stroller recall?
• What is the commercial warranty length outside the EU?
• Which safety standards or certifications does the seat meet?
• Does the rain cover contain ventilation openings?
• Are replacement fabrics, harnesses and adapters available?
• Is the 3.1 kg weight measured with adapters and rain cover?
• Which exact stroller production years accept this seat?

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
• The tools and how to call them
• The stores you can buy from
• Every store's products
• Search every store at once