Spare tires are a lifesaver when one of your regular tires pop in the middle of a highway or you may just find the car with a deflated tire. But, how long can you drive on a spare tire? The most common advice would be to check the owner’s manual that usually suggests not more than 70 miles at a maximum 50m/h (for a donut tire) as the rule of thumb There is no definite answer to this question because it depends on several factors. It happens mainly because the modern vehicles come with a donut tire, which is smaller than a full-size tire. The logic behind it is that people need it on rare occasions and don’t even use it for a long time. Also, a smaller tire saves space in the trunk 1. A Full-Size Spare If the spare is a full-size tire, given that it is the same size and type as the ones in your vehicle, you can drive it like a regular tire and use it until it wears out. You may think that the spare tire will be like a new one if you don’t use it. This is not true. If it is ...