[Nonfractal]

Something I've always noticed about Urethane (ortmanns) is that the tyres are always single sided. 
One tyre wall is a perfect representation including the formula and manufacturer (of the original) on the outer sidewall , but very roughly cut on the inner sidewall which is a bit annoying for open wheel racers where the inner wall is on display, 

How do the major rubber tyre manufacturers create those perfect sidewalls on the outer and inner face ? 
Could that same process work for Urethane ? 

AlanW