Slip indicator light when going about 60mph

I have this issue too and all my tires are the same size. Is the wheel speed sensor the same as the abs sensor

 

Same brand and model too, not just nominal tire size?

Even with the same marked tire size, different models can have surprisingly different revolutions-per-mile specs.

 

I stand corrected one is a 195 65 r15

 

Is the speed sensor the same as abs sensor?

 

So the car senses that it is not spinning at the same rate as the others, so thinks that it is slipping.

 

What's the size of the other 3 tires?

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