It's not easy to find a set of 15" alloy wheels fitting the Alfa 108 mm bolt-hole circle. European Ford Mondeos or some Peugeot cars have an equivalent spec. These are German manufactured R.O.D. Leichtmetallräder GmbH - Rondell 26 6.5 x 15" wheels on the GT junior. The wheel offset is 25 mm (ET). Tires are 195/60 R15 Bridgestone RE720.
I use 10 mm spacers at the rear axle on each side to trim the vehicle to neutral steering.