Once again we need a good scientific test... Let's see different: tubes, tires, air pressure, load, speed, temperature, rubber types, talc powder, corn starch, grease, etc. Sounds like a university engineering proposal. Now just need a sponsor.
KTM 400 XCRW with Thumper Racing 450 kit and 450 cam 2007
KTM 450 XCRW with Christini AWD and Plated 2008
KTM 990 Adventure 2008