http://www.slot.it/INGLESE/KitPart/Technique/TecTires.html
Here Colin is the suggested use by Slot it
When you true the tire, if the tire dosent sand well it is likley silicone, if it sands with a black dust , then rubber, and if it is a grayish dust
then urethane is the likely material.
The dust or remnants from a rubber tire such as Allslot or NSR rubber will be black, and chunky whereas the urethane leaves a finer grayish dust, unless a different color pigment is mixed, then it will be slightly hued to, that mix. Of course we all know how hard it is to sand
silicone.
Bob
Here Colin is the suggested use by Slot it
When you true the tire, if the tire dosent sand well it is likley silicone, if it sands with a black dust , then rubber, and if it is a grayish dust
then urethane is the likely material.
The dust or remnants from a rubber tire such as Allslot or NSR rubber will be black, and chunky whereas the urethane leaves a finer grayish dust, unless a different color pigment is mixed, then it will be slightly hued to, that mix. Of course we all know how hard it is to sand
silicone.
Bob