# Car seat adapters for double strollers Which car seat adapters allow car seats for more than one child to be used on a double stroller? Mountain Buggy Nano Duo Twin Car Seat Adaptor: The adaptor takes two car seats at once, one on each side\. joovy Twin Roo\+ Maxi Cosi/Cybex Carseat Adapter: Users say the kit includes adapters for two car seats at once\. Baby Monsters Car Seat Adapter: Both the Right\-Upper and Lower\-Left adapters are required to fit two car seats on the chassis\. Valco Baby Car Seat Adapter for Maxi Cosi: The Twin Adapter Kit contains one Maxi\-Cosi/Nuna/Cybex adapter and one Universal adapter; a twin setup needs one of each because two identical adapters will not work\. ### 1. [Mountain Buggy Nano Duo Twin Car Seat Adaptor](/products/ucp/megababiesusa-com/7438517993726) (sold by megababiesusa\.com) The adaptor takes two car seats at once, one on each side\. - Two\-seat setup: The adaptor takes two car seats at once, one on each side\. (guide) - Car seat brands: Compatible car seats listed by the maker are Mountain Buggy protect, phil&teds alpha, Maxi\-Cosi Cabriofix / Pebble Plus / Mico, Peg Perego Primo Viaggio 4\-35 and Primo Viaggio 30/30, Cybex Aton / Aton 2 / Aton Q, Nuna Pipa, Graco Snugride 35 and Snugride Clickconnect 35, and Chicco Keyfit\. (guide) - Stroller: The adaptor is intended for use on the Mountain Buggy Nano Duo only\. (guide) ### 2. [joovy Twin Roo\+ Maxi Cosi/Cybex Carseat Adapter](/products/ucp/joovy-com/8695988420836) (sold by joovy\.com) Users say the kit includes adapters for two car seats at once\. - Two\-seat setup: Users say the kit includes adapters for two car seats at once\. (review) - Car seat brands: Joovy lists this as a TwinRoo\+ adapter fitting Maxi Cosi and Cybex seats; this disagrees with the review's claim that it accepts only Maxi\-Cosi seats\. (guide) - Stroller: - ### 3. [Baby Monsters Car Seat Adapter](/products/ucp/megababiesusa-com/856678629437) (sold by megababiesusa\.com) Both the Right\-Upper and Lower\-Left adapters are required to fit two car seats on the chassis\. - Two\-seat setup: Both the Right\-Upper and Lower\-Left adapters are required to fit two car seats on the chassis\. (guide) - Car seat brands: The adapter is only for Maxi Cosi and Cybex car seats\. (guide) - Stroller: Fits Easy\-Twin 2\.0, 3\.0 and 3\.0S strollers\. (guide) ### 4. [Valco Baby Car Seat Adapter for Maxi Cosi](/products/ucp/megababiesusa-com/793065881661) (sold by megababiesusa\.com) The Twin Adapter Kit contains one Maxi\-Cosi/Nuna/Cybex adapter and one Universal adapter; a twin setup needs one of each because two identical adapters will not work\. - Two\-seat setup: The Twin Adapter Kit contains one Maxi\-Cosi/Nuna/Cybex adapter and one Universal adapter; a twin setup needs one of each because two identical adapters will not work\. (listing) - Car seat brands: Mega Babies lists compatibility with Maxi Cosi Mico, Nuna Pipa, Cybex Aton, Bugaboo TurtleOne by Nuna and Clek Liing; sources disagree on Clek Liing compatibility, as Little Canadian says the Trend Duo A9905 adapter will not work with it\. (listing) - Stroller: The store feed lists variants for Snap Ultra Trend, Snap 3 & 4 Trend, Snap Duo Trend \(one car seat\) and Snap Duo Trend Twin Kit \(two car seats\)\. (listing) 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\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-29T21:13:25.030Z. 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](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)