bshpilot wrote:
next time you see a tractor trailer look for the spare....very few have one.
This is not true at all,most all Tractors on OTR trucks will have an un-mounted spare tire somewhere. I can tell you from 40 years of experiance that not having one is pure insanity. To keep going you have to have tires and all roadside tire services for trucks have the equiptment to mount them.
We always had spares for the Tractor and the Trailer. We could not leave the plant without them. I don't know if the laws have changed or not but in some states when you were pulled in for inspection you had to have a spare or you were not going back out on their roads.