One of my colleagues spotted a brand new BMW E39 M5 rear right brake disc on eBay for £80 delivered last week, so I bought it – partially because I’ll need it (when I get a left one to match), but also for the comedy value of having a single giant brake disc delivered to the office. It arrived today!

This is a serious bit of kit. It’s enormous, heavy, and floating bell design – this is just a rear brake! The engineering involved in creating this disc is notable – it represents the rest of the car in a healthy manner.