UPS was the carrier. Commercial address. The idiot thing is they decided to re-bill me a additional surcharge on 3 tires and not 4....duh
But, it's outlined in their policy that if tires are not in a full corrugated cardboard, there will be a special handling charge per each tire.
I never knew this or just have been lucky. Had I know this though, I would def. incorporate this into the shipping fee so I would not have to absorb on the costs. Lessons learned.