Tried this on a fireblade evo with minispikes on grass a few years back.
Gave less forward traction but better side bite.
Main problem was that the car would roll over very easily if the car caught the slightest bump.
A small tyre will fit into ruts and hollows where a big wide tyre will roll over the top.
Also when a wide tyre reaches a certain camber angle it lifts most of the tread off the ground, loses traction and the car slides instead of rolling. With a narrow tyre - particularly one with a rounded profile such as a minispike the tyre can reach a much more extreme camber angle before it starts sliding.
Might be worth trying in the wet, if you have a layer of mud / standing water , as the tyre will cut through the surface better.
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