Forgive me if this has been asked before. I have just had to replace my whole drivetrain for the third time in less than three years. Cheap it aint! I have a Marin Mount Vision. I ride a lot but religously clean and maintain all of the bike. Surely the wear of these items is too quick? I used to have a set of Pace chain rings on my old bike which lasted for absolutely years, my wife rides that now and they are still good. What other rings could i try which are compatable with Shimano changers etc. I only want to hear of very durable ones though as i,m fed up spending out often. Your help is appreciated. Bob.