Bogie tire

thingiverse

This should be printed with flexible filament, preferably black. Print the "bogie HALF" otherwise you'll probably not fit the tire without cutting something. I was able to print one half at a time without a raft and the filament stuck to the bed very well. If you print out Popzultan's tracks use this so the tire extends to the guide horn on each side. These won't work with stock tracks as they are center guide design and these tires cover the middle tire slot. You'll have to disassemble the bogie to get these on. Print one and try fitting it onto a tire, you might need to scale slightly. After running them outside they will weather and not be so shiny.