# Single\-to\-double strollers for two children Which stroller can be converted from a single seat to a double for two children? Bugaboo Donkey 6 Twin Stroller \- Complete Set \(2 Seats and 2 Bassinets\) Customize Your Own: It converts from a single stroller to a side\-by\-side double in three clicks\. Bugaboo says the twin is 74 cm/29\.1 inches wide and its slimline design fits through standard doorways\. Silver Cross Wave 2021 Stroller: It is a single stroller that converts to carry a newborn and a toddler with no extra purchase needed, thanks to the One plus One system\. A second \(tandem\) seat and the toddler ride\-on board are not included and must be bought separately\. Silver Cross Wave 3 Single\-to\-Double Stroller: The maker says the Wave 3 includes a newborn carrycot, main seat and tandem seat so it can carry a newborn and toddler as a double from the start\. The store says the Wave 3 has 12 riding modes; the maker's page says 7 single\-to\-double stroll modes are included in the box, so the sources disagree on the mode count\. Bugaboo Donkey 6 Duo: In\-store testing found the three\-clip frame expansion works as claimed and, once locked, the widened frame felt like a single\-piece chassis with no flex or wobble\. ### 1. [Bugaboo Donkey 6 Twin Stroller \- Complete Set \(2 Seats and 2 Bassinets\) Customize Your Own](/products/ucp/megababiesusa-com/9157935530238) (sold by megababiesusa\.com) It converts from a single stroller to a side\-by\-side double in three clicks\. - Conversion: It converts from a single stroller to a side\-by\-side double in three clicks\. (listing) - Width: Bugaboo says the twin is 74 cm/29\.1 inches wide and its slimline design fits through standard doorways\. (guide) - Extra seat: - ### 2. [Silver Cross Wave 2021 Stroller](/products/ucp/megababiesusa-com/6857963012249) (sold by megababiesusa\.com) It is a single stroller that converts to carry a newborn and a toddler with no extra purchase needed, thanks to the One plus One system\. - Conversion: It is a single stroller that converts to carry a newborn and a toddler with no extra purchase needed, thanks to the One plus One system\. (guide) - Width: Set up for use it measures about 43 in long, 23 in wide and 37 to 43 in high\. (guide) - Extra seat: A second \(tandem\) seat and the toddler ride\-on board are not included and must be bought separately\. (guide) ### 3. [Silver Cross Wave 3 Single\-to\-Double Stroller](/products/ucp/megababiesusa-com/8562650022142) (sold by megababiesusa\.com) The maker says the Wave 3 includes a newborn carrycot, main seat and tandem seat so it can carry a newborn and toddler as a double from the start\. - Conversion: The store says the Wave 3 has 12 riding modes; the maker's page says 7 single\-to\-double stroll modes are included in the box, so the sources disagree on the mode count\. (guide) - Width: The store gives the open size as 43\.72 inches long, 23\.5 inches wide and 37 to 43 inches high\. (guide) - Extra seat: The store lists the chassis, overnight sleep\-approved bassinet, main seat, tandem seat, two bumper bars, one rain cover, one bug net, bassinet adaptors, tandem adaptors and cup holder as included\. (guide) ### 4. [Bugaboo Donkey 6 Duo](/products/ucp/megababiesusa-com/9134828323070) (sold by megababiesusa\.com) In\-store testing found the three\-clip frame expansion works as claimed and, once locked, the widened frame felt like a single\-piece chassis with no flex or wobble\. - Conversion: In\-store testing found the three\-clip frame expansion works as claimed and, once locked, the widened frame felt like a single\-piece chassis with no flex or wobble\. (review) - Width: Owner reports single out the narrow 29\.1\-inch double width as the reason to buy, since most side\-by\-side doubles are wider than a standard doorway\. (review) - Extra seat: - ## Also cited in the text - Silver Cross Wave 3 Single\-to\-Double Stroller, overview: The maker says the Wave 3 includes a newborn carrycot, main seat and tandem seat so it can carry a newborn and toddler as a double from the start\. (guide) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. 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