These are brand new tyres that a tech asked me to have made for him
It seems they are common in many of the more consumer brands
For now I have these Sizes and they are sold as a pair
16mm OD x 6mm IDx 2.1mm Thick S1767
20.5mm OD x 10.5mm x 2.1mm Thick S1768
PLEASE IF YOU KNOW WHAT MODELS THESE ARE FOR LET ME KNOW AND
I WILL ADD THE MODELS HERE.
Photo just for illustration