Sibling seats and extensions for the Bugaboo Donkey

Which sibling seats and extensions fit a Bugaboo Donkey stroller?

Bugaboo Donkey 5 Duo Extension Complete: Bugaboo lists compatibility with the Donkey, Donkey 2, Donkey 3, Donkey 5 and Donkey 6. The store says the Donkey 5 changes from Mono to Duo in three clicks when paired with the extension set. One Donkey 5 Twin owner reports that the stroller would not pass through old or new doorframes, accessible bathrooms or some walkways, contradicting the store's standard-doorway claim. Bugaboo Donkey 6 Sibling Seat: The sibling seat turns a Bugaboo Donkey 6 into a side-by-side double stroller for a second child. The store listing says the sibling seat is for children from 6 months up to 22 kg (50 lbs), while the Donkey 6 North American manual says the seat maximum is 23 kg (50 lbs); the sources disagree on the kilogram limit.

ProductWhyDonkey compatibilityConversionSizeLimits
1. Bugaboo Donkey 5 Duo Extension Complete sold by anbbaby.comBugaboo lists compatibility with the Donkey, Donkey 2, Donkey 3, Donkey 5 and Donkey 6.Bugaboo lists compatibility with the Donkey, Donkey 2, Donkey 3, Donkey 5 and Donkey 6. guideThe store says the Donkey 5 changes from Mono to Duo in three clicks when paired with the extension set. guideThe store states the complete Donkey 5 is 29 inches wide in Duo mode. guide-
2. Bugaboo Donkey 6 Sibling Seat sold by albeebaby.comThe sibling seat turns a Bugaboo Donkey 6 into a side-by-side double stroller for a second child.The sibling seat turns a Bugaboo Donkey 6 into a side-by-side double stroller for a second child. listing-Sitting space at the widest point with the footrest is 19.7 in long x 14.5 in wide x 17.3 in deep. listingThe store listing says the sibling seat is for children from 6 months up to 22 kg (50 lbs), while the Donkey 6 North American manual says the seat maximum is 23 kg (50 lbs); the sources disagree on the kilogram limit. listing

Also cited in the text

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 2026-10-10T02:57:57.686Z.

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.