Quote:
Originally Posted by FrankHudson
Reminds me of slot car racing days. The important rear tires used were a foam rubber stuff, but the word was the using black dye made the rubber less stiff or reduced their traction, so instead of black tires that looked like real car tires, the little doughnuts were usually a light color.
The mystery of the translucent raised grip vs opaque smooth face Primetone picks continues....
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Just a guess, but to mold ultem plastic, I wonder if it needed to be thinned to fill the mold properly. May be some additive to facilitate molding the fine details of the grip.