4 X New Bugaboo Donkey 1, 2, 3, 4 & 5 / Bugaboo Buffalo Rear Wheel Bearings. These bearings are compatible with the following Bugaboo models for the Rear Wheel -. Donkey 1, 2, 3, 4 & 5. Sufficient to replace the bearings in two wheels (2 per wheel).
eBay