When doing a tire check on my 3610 Bighorn prior to departing noticed the tire stem valve was bad on one of the tires and replaced it with my spare. Spare is the exact same tire. Was able to get the tire fixed. Can I now leave the tire that was the spare on and finish our trip. Spare has never been used before and the tire it replaced has about 12000 miles on or will the different tread depth be an issue.