My tires have percentages cast into the rubber that slowly appear the more miles you drive so you know how much tread depth is remaining. : r/mildlyinteresting
3D Printed OpenRC Tire Mold for castable Rubber Tires by dan steele | Pinshape
How To 3D Print a Mold To Cast Your Own R/C Tires At Home - Make:
Liquid Silicone Rubber for Tire Mold, Tire Mold Making Silicone Rubber, Silicone Rubber for Tire Mold Making
How to make a tire mold? - Model Building Questions and Answers - Model Cars Magazine Forum
Solid Tips For Casting Colored Silicone Tires | Hackaday
Grippy, Hollow, Silicone Tires for Robots and RC : 5 Steps (with Pictures) - Instructables