The record rear derailleur is the symbol of the record groupset and communicates an unarrestable competitive charge thanks to the dominant presence of carbon fibre every particular has been designed down to the smallest detail to obtain the maximum effectiveness the record rear derailleur ensures rapidity and precision in every situation available with a short or medium cage44 to interface perfectly with classic and compact cranksetsupper to lower pulley axle 55mmshort44 725mmmedi