I have seen 12mm thick pads at a Honda dealer but we still used 10mm as 100% and 2mm as 0%. Same with tires. There are 12/32" but 10/32" is good for new and 2/32" is 0% in Ohio. No one cared that i knew. So i just say 75% when the 1st number is 8 (either mm or... Login to read more.