Question

why do soles of shoes have grooves and wheels on skates do not have
grooves?

Answer 1

Answer:

Most wheels on non-speed skates don't have these because it's easier to make them without grooves. Wheels with grooves are much faster at the expense of durability. The primary reason for the lack of grooves on most wheels is the extra expense in production and the shortened life span.

Explanation:

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