Tires: Spare Tire Size Difference, 4wd truck, drive axle

Question
I drive a 4wd truck with 285/60/18 tires on it now. The spare is a 275/65/18. To my calculations the height difference is approximately 31.46 to 32.00 between the spare and the other tires. Can I run the spare on the non-drive axle without damage? In other words, can I drive it on the front with the truck in 2wd?

Answer
Yes it should work fine.
Remember that a spare should only be used, driven on, from the time it is put on and driven right to a tire shop for repair/ replacement.  About a few miles drive time on a spare.

However, I keep all tires, even the spare, the same sizes.
You sound worried.  If it bothers you, replace it.
John