Originally Posted by WoodWorks
My first K60 rear (140/80-17) was right about ~12mm when it was new. I didn't measure the 2nd one to see if it was any different.
My rear K60 also measured 12mm (actually 11.5mm) when new.
Too bad I damaged the bead when installing it and now I'm stuck with only a K60 front and the stock rear.
What an idiot I am.