Bugaboo Locking Disk Right Side (Non Brake Lever Side) This model is solid for maximum strength when used with plastics. It costs $50 in stainless steel so I had a hollowed out version made for the stainless steel option. There is a good video by a Norwegian repairer I've added a link to. Only two things to add I use a painters knife to hammer under the dome first to protect the plastic from the bigger screwdriver and I use silicone spray not WD40 to lubricate as it is a dry lubricant and will not attract dirt.