Looking to run a 14/50 combo. Can't find anything larger than stock in a steel 525 sprocket. Surprising too, can find lower and can find a 16 and even a 17T front, you would think there would be something lower than the regular "one down in the front". Don't want to run an aluminum rear or go down to a 520 out of longevity concerns. Wouldn't mile converting to a 530 if I could get the gearing I wanted but I have been told that a 530 chain is too wide to clear the frame.