If you search:
Rear stand spools
There will be a wealth of information
Rear stand spools
There will be a wealth of information
Really ? I bought the 8mm Pitbull spools for my `14. did they change the thread size? Haven't had clearance problems either, which some seem to report.5 Color 10mm Carbon Fiber Swingarm Sliders Spools for zx6r ZX6RR 636 1998 2012 | eBay
These worked for me.
10mm will fit your 2013.
Tony, that's interesting that those worked for you. I had the same exact set left over from my gsxr and mounted them on the 14 ninja. Both sides with the oem exhausts scratched a bit from the top of the rings rubbing on them so I took them off.5 Color 10mm Carbon Fiber Swingarm Sliders Spools for zx6r ZX6RR 636 1998 2012 | eBay
These worked for me.
10mm will fit your 2013.