Interesting data:
https://www.pinkbike.com/news/tire-s...-les-gets.html
1) surprised so many ride mullets. I guess they are tired of getting their butt buzzed on such steep tracks...
2) I guess the extra rotational weight of inserts vs. only having to get down 1 run without a flat vs. whatever casing they are using... inserts aren't that popular in this format.
3) Some of the psis run are a little lower than I would have assumed with no insert and the ability of some of these guys to rip a tire off a rim.