It is an open secret that the US presidential limo, affectionately known as “the beast” runs on Goodyear tyres. What many people are less aware of is that – owing to the fact that “the beast” has significant amounts of armour plating – unlike most limousines, the US presidential limo is actually fitted with 19.5-inch truck tyres that are better suited to the vehicle’s increased load. Whatever the fitment, 24 hours after Donald Trump tweeted “Don’t buy GOODYEAR TIRES”, adding: “Get better tires for far less!”, one has to ask if the current incumbent of the White House will be taking his own advice.