Thought it may be wise to post a couple of pictures of Rader with the 905 racer that he drove to a number of records at Sheepshead in 1917. It may be appropriate since this car had a 905 cubic inch Liberty and you can see the tires he relied on. In setting the track records at Sheepshead in August 1917 he reached speeds of 129 mph (later in February 1919 this same engine set an American record on the Florida beaches of 149+, albeit in a one man car). His riding mechanic I believe is Frank Farber who had some nerve as well to ride along at these speeds as a passenger. I believe these pictures from the Old Motor (my pictures are in some file I cannot locate as easily) were taken on August 2 1917 in some of the back area of the Sheepshead complex; an old horse track converted to use as a 2 mile board track. Early August dates must have been good for Packard since a year earlier on August 3, 1916 they set a track record at Indy (with Rader and Farber as the combination on that day as well). The track record was with the smaller Liberty race car, the 299 and it was the first AAA sanctioned (then it was the 300 inch class) to lap the Motor Speedway at over 100mph. The Christie had set a 100mph record a bit earlier but it was an exhibition car and not sanctioned to run in the top tier AAA racing. Rader and Packard's chief engineer (in the bow tie) took turns for some record runs around the bricks. Vincent was used to high speeds as big time boat racing was his hobby. Here is a pic of the 299 at Indy.