If you think that THOSE are ridiculous...Just take a looksee at Soyo's CR $500 road racing tire.
Exerpt from Soyo's Brochure-
The road race version of the seamless tire is finally coming out from SOYO, the "Japanese only-one brand" for keirin tires.
The highest Japanese craftsmanship crystallized in the skills making this tire totally seamless.
It realized incomparable light weight for smooth acceleration.
The round section gives better attachment to the rim and the supple finish enhances the grip.
It secures the stable cornering at high speed to lead the racers to the best ride for the decisive battle.
I love how the Japanese language is so descriptive. Thanks Kay!