GERRY, NIC - If your running in areas with thorns, well, short of a vehicle with steel wheels or tracks, like Dan H's CC 100 Crawler, there's not much defense against thorns puncturing tires. Bush-Hog rotary mowers use a "laminated rubber tire", the tire is made from squares of old tire casings and attaches to a bolt-together rim/wheel. No air in them so they can't go flat. Running over the short stumps left after bush-hogging can puncture tires REAL easy too. Farmers are finding the new GMO corn stalks are like small sharp tree trunks also and will puncture 8,10, even 12 PR tires. For combines, etc they'll end up using log skidder tires which have a band of steel mesh vulcanized between the tread & tire casing. Still tears the tread up but reduces the chances of a flat. My Buddy took a short-cut across the corn field from his Dad's place 30+ yrs ago in his brand new Jeep CJ-5 and stuck a corn stalk through the sidewall of a GY Wrangler tire. He should have drove the 100 feet out to the road!
I used to have tire/rim/wheel inventory sheets I made up that showed average daily useage of all the tires/rims/wheels and a brief description. Bottom line, was just on those three items, I needed at least SEVEN-TEEN semi-truck loads of stuff to keep the line running a DAY. I was also responsible for a small stamping house in Dubuque, IA., o-rings from two sources, National Seal in Downey, CA, and a minority supplier in Indy, batteries from either Delco on Olatha, KS, or Presto-lite in Toledo, OH, which since they were two per tractor, A full semi-truck weight wise lasted about 4-1/2 DAYS. Then in the early/mid 1980's ILL went to 80,000# gross up from 73,280 so a full to legal weight truck would have lasted a week. I also released paint, mostly from Moline Paint Mfg, little from Valspar, then Sherwin Williams took over on the new red for the e-coat system, the big paint tank at the end of the finish assembly line. But the old 2150 red was still used on all the cast parts. And I also ordered clutch disks & pressure plates from Rockford CLutch, Div. of Borg-Warner in Rockford, IL. Then there were the other special little projects, like chasing difficult service parts for others. Special order tractors that needed special tires/wheels, outside contracted stuff. I was a tough guy to keep busy.