I have owned this car since 1986. The 635 was an awe inspiring design when it first came out as a 630 in 1976, and the clean, svelte lines still look good today. Mine has suspension and other improvements made by Dinan Engineering. The wheels now are BMW 5 series sport wheels-in order to get away from the special TRX wheels (in this photo) that came on this 635 requiring special TRX tires made by Michelin and Avon-now technologically outdated. A number of other car manufacturers at the time, including Ferrari, chose to use TRX wheels and tires because it was advanced compared to then tire technology, and was actually the first of today's low profile tires.