I probably shouldn't say this but.... When I worked in factory maintenance, the two slant 6 fork trucks we had were both equipped with a very narrow 8 3/4.. Sure Grip time? LOL! Bet that would be fun with about 4,000 load on an 8,000 lift, trying to make a turn.

For those that don't know fork trucks, the one Joel has uses solid steel wheels with pressed on tread less tires vulcanized on to a steel sleeve. New tires with tread on the outer edges are available, but won't help much because one of the drive tires was usually off the ground. 40 years ago new solid rubber with the steel sleeve, drive wheel, fork lift tires were just over $500 each, the steering tires with the steel sleeves were about 1/2 the price). Wouldn't try to guess what they would cost now.

I did just see that Joel's fork lift already has the treaded drive tires. That is as good as they get as far as traction, which pretty much sucks on anything other then a dry, hard surface.