I am building a set of 27.5 inch wheels for a spec levo. The brakes are the standard sram guide RE which use 200 mm rotors. Are there any recommendations for new rotors? are the shimano icetech better? or should i get the 'floating rotor'-i don't know why you'd want a two piece rotor-just more points of failure. Assuming I go for the regular centerline rotor-should i get the 200 mm rounded edge or the 203 mm?
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