Excepting a sprocket on a fixie which was nicked within days of getting said new sprocket, chain and chainring, this is the only piece of dura ace (or equivalent) kit I've owned. Really rather nice they are too! It's a shame Kona have gone all conventional for the 2010 Honky Tonk. I've put mine on a bit of a diet, the wheels probably accounting for most of the reduction in weight. (They were quite bargainous too from Decathlon) Decent rear mech and cassette for very positive shifting with those d/t shifters And that's all I'll bore you with for now.