Does a 48 tooth replacement exist for the Shimano FCM341-L w/ Replaceable Rings, 22/32/42t that came with my bicycle? The bicycle's tech page can be found at http://www.diamondback.com/bikes/mtn...l/response-08/.
I was originally hoping to just replace the top-ring but the LBS said that would result in significant performance differences due to the whole crank-set being "specially designed" or whatnot. So, I'm starting to think replacing the whole crankset would be the best route but is it possible? If so, would a Shimano Ultrega 48 tooth crankset work fine? I'm not sure how compatible my particular bicycle is with other components but I'd like a 48 tooth front for maintaining 30 mph without pedaling as if I were a madman(30 mph on the flat).