octane 
 
 1/24 and 1/18 resin wheel and tire, 3D printing
 Available in different rims.
 
 18" - Single diameter of 18"inch. 24.1mm tire / 20.5mm wheel diameter X 11.3mm width
 18"/21" - Combination of 18" and 21"inch diameter.
 21" - Single diameter of 21"inch. 25.8mm tire / 22mm wheel diameter X 13mm width
 
 One size 1/18 - 34.2mm tire / 29mm wheel diameter X 15mm width