gone completely flat and could not be refilled with air . So , had to get out the small donut tire for 1st time . That too was down to 12 p.s.i. and set to 60 that's on side of it . Question is , how long can this be left on ? Don't plan to drive until we get appointment to remove the 3 other snow tires . Had checked the tires a few days before . Hope the donut doesn't lose air . Plan to check it everyday until replaced .
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