The debate over how much tread depth is sufficient and recommendable has been going on for years. While some tyre makers and motoring groups support changing the legal minimum tread depth to 3mm as a move towards greater peace of mind, Michelin has been a vocal advocate of not only keeping 1.6mm the legal minimum but of actually using tyres right down to this tread depth. It is also one of a growing number of parties calling for legislation that informs consumers how tyres perform when worn. Earlier this month, Michelin shared the latest developments in the quest for ‘Long Lasting Performance’.