The KidBlock is a micro-knurled tire with two rows of blocks as upper-sidewalls for some bite. We made a large 2.30 like the Kranium and gave the same construction, with a 100psi rating and a 4-ply casing to reduce flats. Knurled block-shapped non-directional design benefits both acceleration and traction Knurled centerline in tread pattern allows for continuing, non-interrupted rolling with allows for less rolling resistance Lightweight casing with folding bead technology for less rotational weight TIRE TECHNOLOGY
STANDARD RUBBER COMPOUND (SRC) Standard Rubber Compound combines the best attributes of low rolling resistance, high durability and tread longevity into one universal package that benefits riders from daily commuting to weekend touring.
just what I was looking for... 
