Well, this arrived a while back from Dacs and I pick it up, put it down, and stare at my 40 toother which is a really nice balance between speed and torque. What I need is input from those who installed it . How many of your favorite hills do you now avoid with your 36 toother installed ? I really like the idea of speed at lower engine revs , it just seems to me that over time this has got to be cumulatively better for the engine. On the other hand, a lot of my ability to leave my local area and get out farther with the bike is dependent on a few hills that can't be avoided if I want to get to the countryside areas.