[Alex Csank]

Now, lets look at Alfa wheels more specifically:

Bolt-patterns - For a very long time, Alfa Romeo used a 4 X 108mm bolt-pattern. This is the pattern used on all Giuliettas (750 and 101 series) and Giulias (105 and 115 series). This includes all GTVs (Bertone coupes) built between 1963 and 1975, all Spiders built between 1966 and 1994 and even the Montreal. The Alfetta design came with a new bolt pattern, in 4 X 98mm. This was used on all Alfetta sedans, GTVs and Sprint Veloces. Coinciding with the introduction of the V6, Alfa introduced the 5 X 98mm pattern. They still use this pattern in modern Alfas. I do not have any information about some of the other (non-US) Alfas like the Alfasud, 33, etc., nor did I include information about the 1900, 2000 or 2600 series (104/106). But perhaps some of our European or Asian friends can enlighten me regarding those sizes.

Wheel diameters - With the large drum brakes used on early cars like the Giuliettas, Alfa used a 15 inch diameter wheel. This was necessary to keep the wheel from rubbing on the brake drums. When Alfa switched to disk brakes, they first used Dunlop brakes (from about 1963) which also necessitated a 15 inch wheel. With the advent of the ATE disk brakes (in 1967), Alfa was able to reduce the rim size from 15 to 14 inches. This was a popular idea back then, as it reduced the weight of the wheels and tires and allowed for the use of more modern radial tires being produced at the time. With the advent of the GTV6 and new radial tire technology, Alfa increased the size of its wheels to 15 inches again. In the '80s, Michelin developed a metric size system which was used on a few cars, including the Ford Mustang and the Alfa GTV6. Some GTV6s came with these odd wheels, which I believe were 390mm tall. If you have a set of these, it can be very difficult and expensive to find tires to fit them today. With the advent of the Milano (75) V6 in North America in 1987, Alfa used a 14 inch steel wheel as a standard size on the lower-priced Silver models, a 14 inch alloy wheel on the Gold models, and 15 inch wheels on both the Platinum and Verde models. The 164 arrived in 91, and used either a 15 inch steel (base model), a 15 inch alloy ('L' - Lusso models), or the unusual 15 inch alloy wheels found on the 'S' models. Modern Alfas use various types of alloy and steel wheels, with sizes between 14 and 18 inches.