1. Because of the quality of tires being manufactured today, unless you own a Porsche 911 or a like vehicle it for the most part isn't needed on most vehicles.
....this has been my experience; of our four Michelin AT2s, 2 tires needed absolutely no weights whatsoever; the other 2 tires each had a weight so small, I wondered why they were
ever put on.
Thanks for some very interesting discourse.
NO ONE on this Forum has ever even mentioned or addressed the term "unsprung weight" as far as I know; this alone is impressive. Keeping
Unsprung weight as low as possible (for reasons of performance/fuel mileage) is the reason why we keep with the lightest tires (OEM 245s) we can find in LR E range, and have not gone with massive and heavy 285s or 19.5 monsters. However, will transgress just slightly, and move to a 265 size tire 6 LBS heavier. That's about as far as I will go.
S-