I do alot of woods riding in wv, nc. pa & sc. I found a 12 tooth front sprocket gives me alot more low end and quick Accleration. I have raced in Hare scrabbles with this setup and found I would more fully use my top gears 4th & 5th. I also found the range of 3rd gear ratio to be well suited for tight turns to hill climbs. Since then, :eek: I have changed to FMF fatty pipe, removed lid, power reeds, moose spacer rings, etc. to increase low end, have tried going back to 13tooth and still find 12 tooth to be much better. With my riding style, I rarely need the extra top speed of 13 tooth.