the tyres could blow and you may lose controle of your car
Those tires aren't save for winter driving in Wisconsin because the tread is warn.
Bald tires can effect anything concerning braking. You will not stop as quickly with bald tires as with tires with tread period. No matter if you have ABS or not.
Your vehicle owner's manual has tire inspection or replacement recommendations but your tires should be replaced if they are over 5 years old or the remaining tread is 5/32" for driving in snow, 4/32" for driving on wet roads and 2/32" for driving on dry roads.
More than narrow tread tires.
Price, quality, type of tread for the type of environment you're driving in, warranty offered on said tires.
Minimum tread depth for all 4 tires is 2/32"
I doubt that very much.
Slow down and avoid driving into deep water covering the road. Replace worn tires that have less than 4/32" of tread wear left.
60% tread wear.
Many tires have tread wear indicator bars molded into the tread. When the tread is worn down to where you can see a solid bar of rubber across the width of the tread, it is time to replace the tire.
I assume you are referring to the tread. High grip will have a more aggressive tread design used in off-road conditions or in deep snow. They are called off-road tires or snow tires. The difference is in the tread design.
While it is good to use tires with the same tread and sizes, it is possible to use tires with different tread patterns, though you should be careful as the performance of the two tires may be different, causing your car to be unbalanced, endangering your passengers.