Quote:
Originally Posted by Mike Bell
The disc thickness isn’t mentioned on the extension referring to the large diameter discs, which as stated above, were able to be used with 15” wheels from July 1974. As I have 304mm diameter on my car I know they are 25mm..... 
I’d just be a little concerned that if 260 x 25mm wasn’t used in period, it would prohibit it’s use now- BUT as the Monte Carlo caliper is commonly used with small discs and 13” wheels, I guess it must be acceptable!  |
Well , actually Mike , the 300mm dia discs are quoted as 31.75mm thick in the Homologation .
But as the measurements are quoted as maximum,s , then I think it is allowed to machine smaller . As in the 280mm x 25mm discs being cut down to 260mm x 25mm .