- Joined
- Aug 7, 2007
- Messages
- 2,384
- City
- Michigan
- Vehicle Year
- 1984, 1997
- Transmission
- Manual
- My credo
- If you're not making mistakes, you're not learning.
but I note that wherever they're used routinely (heavy passenger aircraft, tractor-trailers), they are deployed in PAIRS, for redundancy, i.e. what's the chance of both tires blowing out/separating at the same time?
Thus while 16 of the 18 wheels on a "semi" might be re-treads, the critical front 2 tires NEVER are.
Actually thats basically for weight distribution (planes at least). I forget what the plane was but it was one of the larger (or largest?) planes at the end or immediately after WWII. They tried the single 2 wheel thing like all the other aircraft had at the time but when they rolled it onto the test runway all that pressure on 2 points actually crushed the runway concrete. Thus the 4+ tires that are spread out on basically any larger aircraft today. What good is a bomber that can only take off and land on a select few state side runways?
And semi's are running single tires in the rear called (creatively I might add) "Super Singles". Which given they pass the rigorous inspection process, I'm sure are retreaded as well.