Im running stock 14 41 sprockets. Went to a taller tire. Guys at Cascade said instead of going to a 13 in the front go to a 43 in the back. If I understand right they said the less teeth the less it has on the chain??? I strickly only ride dunes. Im running fatty's, reeds, Pods, 4" extended swingarm, Big bore, carbs etc. I went from a 9 paddle hauler to a 9 paddle extreme.thanks