I picked up 5/16" x 3" lag bolt in my back tire yesterday ...not your average sized intrusion. I was able to use a standard tire plug kit and get home from work. This morning the plug came out on the way to work, I then used my BMW plug kit and CO2's to get it home. I'm concerned that because of the size of hole that a plug just wont stay. Will a patch from inside last the life of the tire or am I looking for a new tire ?