Ford Tourneo Custom tyre choices from Tyres.co.uk for current-generation units with factory 16-inch wheels include the Michelin Agilis 3 and Bridgestone Duravis Van in the size of 215/65 R16C 109/107T. Please check the placard and registration, as various wheel sets have different fittings, and replacements are required to comply with Ford's load and speed ratings.
You can find the tyre size of the Ford Tourneo Custom on the tyre-information placard located on the driver's-side B-pillar or, in some versions, on the edge of the driver's door. The placard includes the details on the approved tyre specifications and pressures. Compare them with the owner's manual and tyre sidewall before placing an order.
Usually, it is not necessary to change all tyres on the Ford Tourneo Custom, so change tyres in pairs on the same axle and fit the new pair on the rear axle. Ford Tourneo Custom AWD versions require all four tyres to be of the same size, type, brand, and model, so if there is no matching tyre, all four must be changed.