Hamilton explains “massive” issue behind US GP slump

A cross-weight problem - a weight imbalance across tyres - affected Hamilton’s car after some major extra work saw the water pumps on both W09s replaced as a precaution. Mercedes also had to deal with an increase in the prescribed Pirelli rear tyre pressures, and the team also closed up the ventilation holes in its rear wheels to avoid a possible post-race protest. All of those factors ... Keep reading