Quote:
Originally Posted by LMH
It doesn't appear to be the same tires when it was a Moons shop though. Tread looks different.
Larry
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The tire shown at AC is one of the versions of Sports Car Special by Goodyear. The optional street and race front tire for early CSX20xx cars was a 6.00/6.40 GYSCS. When "race" tires were chosen they were used with "race inner tubes" also by Goodyear. The old original inner tubes are rarer than the tires. Most of the race inner tubes also had high pressure metal stem caps, which could also have been made in either England or America. I have the 6.00/6.40 Sports Car Special spare race tire, tube, and cap from a very early Cobra.
One topic often over looked is outer tire diameter for rear wheels. Street Cobras were fitted with large diameter tires early on all four corners. A works drawing shows a 27 inch rolling diameter and 3.54:1 final drive gears. The 6.50/6.70 GYSCS tires were down to 26.0 inches in OD and the 7.35 GYPC tires most Cobras were fitted with were only 25.5 inches in OD and the cars came with a 3.77:1 final drive gear. That is just a sampling. SAI used all kinds of diameters and all kinds of gear ratios in racing.