Would you expect this to last more than 2000 miles ? I have just changed the cassette on my CB Dalesman after only 2000 miles. I am also now on my 3rd chain. Sprocket teeth are worn down on the pressure face....... replacement cost at my LBS is £51. Not cheap. Would you expect this item to last longer ? I don't ride hard, but do weigh 18 stone, and have carried some big luggage. But still ????? Have replaced it with a SRAM 11-34 and new SRAM chain. Bargain, got both from ChainReaction for less than half the price of my LBS. Hope it lasts longer than the Shimano.