Big dealerships have a "Pre-Delivery" section that fit the after-market parts to a new vehicle (at least the huge dealerships do in Australia). They offer the "bling" and "boy racer" things that most middle aged divorced men want on a new car to impress their Prey (sarcastic example). The PD shed storage shed often gets filled with OEM parts not wanted, thus they often have a clear-out and great prices and often someone like me gets some inside info (only happened once for me) and buys the lot, on-selling it to others for great profit!It's very interesting that Bridgestone Ecopia 150 175/60/16 (original equipment on the Ignis) appear on the internet at a very low £30 or so unfitted. For example: https://www.tyreleader.co.uk/car-tyres/bridgestone/ecopia-ep150/175-60-r16-82h-629472
These are what is known as demo tyres - such tyres have been previously fitted to rims but often have not covered any miles. Given the oddball size - the source of these tyres is most intriguing and begs the question of an Ignis relationship.