The photo of Carroll Shelby's Aston Martin DBR4 on the grid at the 1959 British Grand Prix at Aintree, which is posted on Terry's Facebook page (but not that easy to find), clearly shows the tyres with the central groove and zig-zag tread pattern.
https://www.facebook...JaguarArchives/
There is another photo on the internet showing the DBR1 pit fire at Goodwood in 1959 which clearly shows (when enlarged) a spare tyre with the same pattern.
https://www.google.c...497194456967032
One could speculate that the same tyres were used in the victory at Le Mans.
Edited by Rob Miller, 10 June 2017 - 15:34.