A wheel like that in 99 f4 would obviously be grippier than classics. That fact about friction does not work with skate wheels. We are grinding the wheels down, wider contact patch means more material to wear down, which means more grip.
Why not? What makes skateboard wheels special that basic physics do not apply to them? Wider contact patch means more material to wear down and better roll over uneven ground but how would it mean more grip?
https://www.physlink.com/education/askexperts/ae140.cfm"Although a larger area of contact between two surfaces would create a larger source of frictional forces, it also reduces the pressure between the two surfaces for a given force holding them together. Since pressure equals force divided by the area of contact, it works out that the increase in friction generating area is exactly offset by the reduction in pressure; the resulting frictional forces, then, are dependent only on the frictional coefficient of the materials and the FORCE holding them together.
If you were to increase the force as you increased the area to keep PRESSURE the same, then increasing the area WOULD increase the frictional force between the two surfaces.
Answered by: Paul Walorski, B.A. Physics, Part-time Physics Instructor"