There are steel cords inside the rubber. If one of these cords frays or breaks, it makes a bubble, or bump or all kinds of different stuff. REPLACE YOUR TIRE IMMEDIATELY. It's going to blow soon and you don't want to be stuck on the side of the road.
Occasionally these knots develop because of a manufacturing defect, in this case it will be covered under warranty.
car tires
Why would you? They're your tires, you bought them.
The best tires for a small car would be the ones that the car manufacturer recommends you use on the car. If you keep good tires on your car and check them every now and then you will get better gas mileage.
To replace all the tires on a car with 27-inch rims, you would need four tires.
When you are looking for car tires, l would recommend the comparison sites like ebay and amazon. Many tire companies have accounts there, and customer feedback is useful in helping you to decide which of the car tires is right for you.
Yes it would. Snow tires are no guarantee of traction on any car.
It would also depend on the road conditions and tread pattern (if any) on tires.
No they wouldn't. You need deep groove tires for mud
Those are wheel sizes not tire sizes.
Conduct and experiment to rest the trip of different tires
Conduct and experiment to rest the trip of different tires
because they would be flat and you would be screwed