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 now has 520 Thumper Racing kit
KTM 990 Adventure 2008