It took me a while but I found it: https://news.ycombinator.com/item?id=30501072 https://news.ycombinator.com/item?id=30501072 Check all the subthreads and lin

It took me a while but I found it: https://news.ycombinator.com/item?id=30501072 https://news.ycombinator.com/item?id=30501072 Check all the subthreads and links, they're not that many. The formula was actually for road damage, but my bet is on road damage being strongly correlated with tire wear.