The Buick Roadster was built from 1936-1958. They were built on Buick's longest non-limousine wheelbase, sharing their basic structure with the entry level Cadillac. It weighed in at 4,098 pounds, 88 pounds heavier than Cadillac's Series 60.
1957 Roadmaster was the first full size Buick that had 12" 45-fin aluminum drums with cast iron liner, in 1958 thru 1965 all Buicks came with 12" 45-fin aluminum drums. From 1965-1970 Buick came out with a 12"
90-fin aluminum drum on full-size models.