TYCO HO Scale Slot Cars what happened to slot cars?

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what is the 5 slot machine strategy_ SLOT CARS & RACING! 132 143 & HO scales! This spot is for our slot cars & racing, Me and my Sister do battle and race 132 143 & HO scale, From what I gather HO slot cars are 164 but all the HO train stuff and figures seem to be 187 for HO Are HO cars really S scale? Do true HO