i also have set and they seems to work well. except for the tendency to over shift when climbing a big pull rifgt at the last 50 ft or so. the R's just drop around 3-400 then when you crest the hill and get on top back to where you were before. Just like nothing happened on the climb. Tried all sorts of weight combos still they still do there thing, but I am not done yet Just my 2 cents other than that the pull hard, belt dust is way way down.