I second that. The kumohdo dragon 2s grip a tiny bit more on looser dirt then the crime fighters. Hyper701 how much of its hardpack and how much of its loose sand? You gotta be fairly specific on track condition because they make tires for anything basically and only one set can be ideal for certain conditions. Mainly if its mostly hardpack (meanin somewhere between full out blue groove or a little bit of loose dirt ontop) or if its mostly just loose dirt or sand thats about and inch deep.

Hardpack: crime fighters, kumohdo dragon 2s, moabs, knuckles
Loose: badlands, dirt harrys
Crime fighters and the dragons are pretty good in both unless the hardpack is straight blue groove then you need knuckles. Theres a lot more tires out there so look around yourself and I told you how each tire works in an earilier post so just try something that looks like it will work on the track.