 The Sport and Touring models came with the 17-inch wheels; the GT had 19-inch wheels.The SKYACTIV®-G 2.5L 16-valve DOHC 4-cylinder engine with VVT was the only choice offered for the 2017 model year.Mazda announced the availability of a diesel engine for 2017 however that engine ultimately did not arrive in the US until the 2019 model year.