The optional summer tires are "Mercedes Original."
There’s a new Ford Explorer on sale and it’s a very good offering. It is available in a number of trim levels and there’s also a range-topping ST model. It’s now based on an RWD platform and promises to deliver a more dynamic road behavior, which should also be complemented by the set of sticky Michelin Latitude Sport 3 high-performance summer tires offered as an option for the Explorer ST.
It turns out these tires were designed especially for Mercedes-Benz. A small “MO” lettering, which stands for Mercedes Original, on the sidewall signals the Latitude Sport 3 rubber was specially developed by the tire company to meet the needs of Mercedes-Benz. In this case, they were designed especially for the Mercedes-AMG GLE43 Coupe.
During the media drive program of the new Explorer, Car and Driver spoke to Ford Performance chief engineer Ed Krenz, who admitted his initial plan was to offer the new Explorer only with Pirelli all-season tires. At some point, he and his team decided to launch high-performance Michelin summer tires for the Explorer ST (which upgrades to larger 21-inch wheels) and Ford contacted the tire manufacturer to see the options.
In response, Michelin said the Latitude Sport 3 MO is the only currently available model that would fit the Explorer ST’s 275/45R-21 parameters. Ford eventually decided that’s fine and that’s why you can order your new Explorer ST with tires designed especially for a Mercedes model. Bear in mind that in the GLC43 Coupe the setup is staggered with 275/45 front and 315/40 rear tires, while Ford’s performance SUV has 275-section tires on all four corners.