I ride tight woods on mostly packed sand with some loose rocks, some mud and a fair amount of slipery roots. My current tire was a Kenda trackmaster, it's now missing several nobs, I know... but I bought it because it was cheap. KDX 220 Rev pipe with dual stage reeds and 13/49 gearing. I screem it like a 125 on and off the gas constantly which is probably why I'm missing nobs. Any Recomendations ? Thanks