Best sell it quick
Very basic physics.
the foam of the ball
Gravity
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No, it would bounce better on warm days because heat makes things exspand and cold makes thing shrink
cement
Probably bad shocks.
its all inside the ball
It's suspension in the forks and or rear of the bike.
Because, you see, the basketball is filled with AIR. Which makes it bounce.
turf grass
It sorta makes it fly and bounce around