Buy a tubeless tire plug kit. Very inexpensive. Consists of a tool which resembles an awl with a slot in the pointy end, a couple of cylinder shaped rubber plugs, and a tube of cement. Tread the plug through the slot in the tool and coat it with cement. Yank out the nail you ran over, and quickly shove the plug into the hole. The tool is designed so that once the plug is inserted, you can work the tool free and pull it out, leaving the plug in place. It's not a permanent repair either. You will still need to go to a repair shop and have a patch applied on the inside. The problems with plugs is that sometimes they can work their way out, and sometimes they get cut in half by the wire mesh used in layers of the tire tread.
rusty redcloud