BMW 507 ROADSTER
The BMW 507 is a roadster that was produced from 1956 to 1959. It was intended to be exported to the United States at a rate of thousands per year, but the expense resulted in only 252 cars being produced and heavy losses for the manufacturer.
The body was mostly hand-formed aluminum so no two models were quite the same. Eleven were sold with an optional hand-fabricated removable hardtop but due to differences from car to car, each hardtop fits only the car for which it was made.
The BMW 507 Roadster had Alfin aluminum drums at 11.2 (284.5 mm).